/* ==================== Reset & Variables ==================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:               #faf8f5;
  --surface:          #ffffff;
  --border:           #e8e4db;
  --text:             #1c1917;
  --text-muted:       #787570;
  --text-subtle:      #a8a39a;
  --primary:          #7c3aed;
  --primary-hover:    #6d28d9;
  --primary-light:    #ede9fe;
  --primary-subtle:   #f5f3ff;
  --danger:           #dc2626;
  --danger-hover:     #b91c1c;
  --danger-light:     #fef2f2;
  --success:          #059669;
  --success-light:    #ecfdf5;
  --warning:          #d97706;
  --warning-light:    #fffbeb;
  --pin:              #d97706;
  --essence:          #dc2626;
  --admin-accent:     #0f766e;
  --admin-accent-bg:  #f0fdfa;
  --radius:           12px;
  --radius-sm:        8px;
  --radius-xs:        4px;
  --radius-lg:        16px;
  --radius-xl:        24px;
  --shadow-sm:        0 1px 2px rgba(0,0,0,.04);
  --shadow:           0 1px 3px rgba(0,0,0,.05), 0 1px 2px rgba(0,0,0,.03);
  --shadow-md:        0 4px 12px rgba(0,0,0,.06);
  --shadow-lg:        0 8px 28px rgba(0,0,0,.09);
  --shadow-xl:        0 12px 40px rgba(0,0,0,.12);
  --max-w:            960px;
  --cat-accent-0:     #6366f1;
  --cat-accent-1:     #8b5cf6;
  --cat-accent-2:     #ec4899;
  --cat-accent-3:     #f97316;
  --cat-accent-4:     #06b6d4;
  --cat-accent-5:     #10b981;
  --transition:       200ms cubic-bezier(.4,0,.2,1);
  --transition-slow:  350ms cubic-bezier(.4,0,.2,1);
}

html { overflow-x: hidden; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  overflow-y: auto;
  position: relative;
  padding-top: 50px;
  padding-bottom: 48px;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-hover); text-decoration: none; }
img { max-width: 100%; height: auto; }

/* ==================== Keyframes ==================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes fadeInScale {
  from { opacity: 0; transform: scale(.94); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes likeBounce {
  0%   { transform: scale(1); }
  30%  { transform: scale(1.35); }
  55%  { transform: scale(.88); }
  75%  { transform: scale(1.06); }
  100% { transform: scale(1); }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(124,58,237,.3); }
  50%      { box-shadow: 0 0 0 8px rgba(124,58,237,0); }
}
@keyframes heroShimmer {
  0%   { transform: translateX(-100%) skewX(-12deg); }
  100% { transform: translateX(200%) skewX(-12deg); }
}
@keyframes homeFloatA {
  0%, 100% { transform: translate(0,0) scale(1); }
  50%      { transform: translate(-18px,-14px) scale(1.08); }
}
@keyframes homeFloatB {
  0%, 100% { transform: translate(0,0) scale(1); }
  50%      { transform: translate(16px,12px) scale(1.05); }
}

/* Stagger fade-in for lists */
.stagger-in {
  opacity: 0;
  animation: fadeInUp .5s cubic-bezier(.4,0,.2,1) forwards;
}
.stagger-in:nth-child(1)  { animation-delay: .00s; }
.stagger-in:nth-child(2)  { animation-delay: .05s; }
.stagger-in:nth-child(3)  { animation-delay: .10s; }
.stagger-in:nth-child(4)  { animation-delay: .15s; }
.stagger-in:nth-child(5)  { animation-delay: .20s; }
.stagger-in:nth-child(6)  { animation-delay: .25s; }
.stagger-in:nth-child(7)  { animation-delay: .30s; }
.stagger-in:nth-child(8)  { animation-delay: .35s; }
.stagger-in:nth-child(9)  { animation-delay: .40s; }
.stagger-in:nth-child(10) { animation-delay: .45s; }
.stagger-in:nth-child(11) { animation-delay: .50s; }
.stagger-in:nth-child(12) { animation-delay: .55s; }
.stagger-in:nth-child(13) { animation-delay: .60s; }
.stagger-in:nth-child(14) { animation-delay: .65s; }
.stagger-in:nth-child(15) { animation-delay: .70s; }
.stagger-in:nth-child(16) { animation-delay: .75s; }
.stagger-in:nth-child(17) { animation-delay: .80s; }
.stagger-in:nth-child(18) { animation-delay: .85s; }
.stagger-in:nth-child(19) { animation-delay: .90s; }
.stagger-in:nth-child(20) { animation-delay: .95s; }

/* Like count bounce */
.like-bounce {
  animation: likeBounce .4s cubic-bezier(.4,0,.2,1);
}

/* ==================== Header ==================== */
.site-header {
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  box-shadow: 0 1px 6px rgba(0,0,0,.04);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  height: 50px;
  justify-content: space-between;
}
.site-logo {
  font-size: 17px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -.4px;
  transition: all var(--transition);
}
.site-logo:hover {
  color: var(--primary);
  text-decoration: none;
  transform: translateY(-.5px);
}
.site-nav { display: flex; gap: 2px; margin-left: auto; }
.nav-link {
  padding: 5px 12px;
  border-radius: 16px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
}
.nav-link:hover { background: var(--primary-subtle); color: var(--primary); text-decoration: none; }
.search-btn { font-size: 18px; padding: 5px 10px; }
.header-login-btn { margin-left: 4px; }

/* ==================== Main layout ==================== */
.main-content {
  flex: 1;
  padding: 20px 16px 0;
  min-height: 0;
  overflow-x: hidden;
}
.main-content--no-tab {
  padding-bottom: 20px;
}
.container { max-width: var(--max-w); margin: 0 auto; }
.container-sm { max-width: 460px; }

/* ==================== Hero Banner ==================== */
.hero {
  position: relative;
  overflow: hidden;
  margin: -20px -16px 0;
  padding: 34px 20px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(160deg, #2e1065 0%, #4c1d95 30%, #6d28d9 60%, #7c3aed 100%);
  min-height: 170px;
}
/* shimmer overlay */
.hero-shimmer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-shimmer::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 60%;
  height: 100%;
  background: linear-gradient(105deg, transparent 30%, rgba(255,255,255,.06) 50%, transparent 70%);
  animation: heroShimmer 6s ease-in-out infinite;
}
/* floating orbs via pseudo-elements */
.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}
.hero::before {
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(167,139,250,.16) 0%, transparent 70%);
  top: -40px;
  right: -30px;
  animation: homeFloatA 10s ease-in-out infinite;
}
.hero::after {
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(196,181,253,.12) 0%, transparent 65%);
  bottom: -20px;
  left: -20px;
  animation: homeFloatB 8s ease-in-out infinite;
}
.hero-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .5px;
  text-transform: uppercase;
  color: rgba(255,255,255,.7);
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 20px;
  padding: 4px 14px;
  margin-bottom: 4px;
  position: relative;
  z-index: 1;
  animation: fadeInScale .45s .05s ease both;
}
.hero-title {
  font-size: 28px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -.6px;
  line-height: 1.2;
  text-shadow: 0 2px 12px rgba(0,0,0,.18);
  position: relative;
  z-index: 1;
  text-align: center;
  animation: fadeInUp .5s .12s ease both;
}
.hero-sub {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  font-weight: 400;
  line-height: 1.5;
  position: relative;
  z-index: 1;
  text-align: center;
  animation: fadeInUp .5s .2s ease both;
}

/* ==================== Page title ==================== */
.page-title {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 22px;
  letter-spacing: -.5px;
  color: var(--text);
  animation: slideDown .4s ease both;
}
/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.4;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.03);
  opacity: 0;
  transition: opacity var(--transition);
}
.btn:hover::after { opacity: 1; }
.btn:hover {
  background: var(--bg);
  border-color: var(--text-muted);
  text-decoration: none;
  transform: translateY(-1px);
}
.btn:active { transform: scale(.97); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(124,58,237,.25);
}
.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: #fff;
  box-shadow: 0 4px 16px rgba(124,58,237,.35);
  transform: translateY(-2px);
}
.btn-primary:active { transform: scale(.96); box-shadow: 0 1px 4px rgba(124,58,237,.2); }

.btn-danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
  box-shadow: 0 2px 8px rgba(220,38,38,.2);
}
.btn-danger:hover {
  background: var(--danger-hover);
  border-color: var(--danger-hover);
  color: #fff;
  box-shadow: 0 4px 16px rgba(220,38,38,.3);
  transform: translateY(-1px);
}
.btn-outline { background: transparent; }
.btn-block { display: flex; width: 100%; }
.btn-sm { padding: 5px 12px; font-size: 12px; border-radius: var(--radius-lg); }
.btn-xs { padding: 4px 10px; font-size: 11px; border-radius: var(--radius); }
.btn-lg { padding: 12px 24px; font-size: 15px; font-weight: 700; }
.btn-success {
  background: #10b981;
  color: #fff;
  border-color: #10b981;
  box-shadow: 0 2px 8px rgba(16,185,129,.25);
}
.btn-success:hover { background: #059669; border-color: #059669; box-shadow: 0 4px 16px rgba(16,185,129,.35); }

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
  box-shadow: none;
}
.btn-ghost:hover {
  background: rgba(0,0,0,.04);
  color: var(--text);
  border-color: var(--border);
  box-shadow: none;
}
.btn-ghost-danger { color: var(--danger); }
.btn-ghost-danger:hover {
  background: var(--danger-light);
  color: var(--danger-hover);
  border-color: var(--danger);
}

/* Like button active state */
.btn-liked {
  background: var(--danger-light);
  color: var(--danger);
  border-color: var(--danger);
  font-weight: 700;
}
.btn-liked:hover {
  background: #fecaca;
  border-color: var(--danger-hover);
}

/* ==================== Forms ==================== */
.form {
  margin-bottom: 20px;
  background: var(--surface);
  padding: 26px;
  border-radius: var(--radius-lg);
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.02);
  border: 1px solid rgba(0,0,0,.04);
  animation: fadeInScale .35s ease both;
}
.form-card {
  box-shadow: 0 4px 16px rgba(0,0,0,.06);
  border-color: transparent;
}
.form-reply {
  margin-top: 28px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.02);
  border: 1px solid rgba(0,0,0,.04);
  border-radius: var(--radius-lg);
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.2px;
}
.form-group small { display: block; font-size: 12px; color: var(--text-subtle); margin-top: 4px; }
.checkbox-label {
  display: flex !important;
  align-items: center;
  gap: 8px;
  font-size: 14px !important;
  font-weight: 600 !important;
  cursor: pointer;
  user-select: none;
}
.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
}
.input {
  display: block;
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 15px;
  color: var(--text);
  background: var(--surface);
  outline: none;
  transition: all var(--transition);
  font-family: inherit;
}
.input::placeholder { color: var(--text-subtle); }
.input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(124,58,237,.1), 0 0 0 1px rgba(124,58,237,.15);
}
.input.input-error {
  border-color: var(--danger);
  background: var(--danger-light);
}
.input.input-error:focus {
  box-shadow: 0 0 0 4px rgba(220,38,38,.08);
}
.textarea {
  resize: vertical;
  min-height: 120px;
  font-family: inherit;
  line-height: 1.8;
}
select.input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23787570' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.form-error {
  padding: 11px 16px;
  border-radius: var(--radius-lg);
  background: var(--danger-light);
  color: var(--danger);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  border: 1px solid #fecaca;
  animation: fadeIn .25s ease;
}
.notification-banner {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  background: #fef3c7;
  color: #92400e;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
  border: 1px solid #fcd34d;
  animation: fadeIn .25s ease;
  text-align: center;
}
.form-footer { text-align: center; margin-top: 18px; font-size: 13px; color: var(--text-muted); }
.login-tip {
  margin-top: 22px;
  padding: 14px 18px;
  background: var(--primary-subtle);
  border-radius: var(--radius-lg);
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
  border: 1px solid rgba(124,58,237,.1);
}
.restricted-tip {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--surface-alt);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.search-form { margin-bottom: 24px; }

/* Word count */
.word-count { font-size: 12px; color: var(--text-subtle); font-weight: 500; }
.textarea-lg { min-height: 260px; }

/* ==================== Category chip selector (new-topic) ==================== */
.cat-chip-selector { display: flex; flex-wrap: wrap; gap: 10px; }
.cat-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px 10px 12px;
  border-radius: 28px;
  border: 1.5px solid var(--border);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}
.cat-chip:hover {
  border-color: var(--primary-light);
  background: var(--primary-subtle);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(124,58,237,.1);
}
.cat-chip.selected {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(124,58,237,.35);
  transform: translateY(-2px);
}
.cat-chip-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--chip-color);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  flex-shrink: 0;
}

/* ==================== Compact category display (new-topic pre-selected) ==================== */
.cat-compact {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
}
.cat-compact-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px 8px 10px;
  border-radius: 28px;
  border: 1.5px solid var(--primary);
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(124,58,237,.35);
}
.cat-compact-chip .cat-chip-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--chip-color);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  flex-shrink: 0;
}
.cat-compact-change {
  padding: 6px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}
.cat-compact-change:hover {
  border-color: var(--primary);
  background: var(--primary-subtle);
}

/* ==================== Category Picker Overlay ==================== */
.cat-picker-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 250;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn .25s ease;
}
.cat-picker-dialog {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 24px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-xl);
  animation: fadeInScale .3s cubic-bezier(.4,0,.2,1);
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}
.cat-picker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.cat-picker-title {
  font-size: 17px;
  font-weight: 800;
}
.cat-picker-close {
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  font-size: 22px;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.cat-picker-close:hover {
  background: var(--bg);
  color: var(--text);
}
.cat-picker-body {
  overflow-y: auto;
}
.cat-picker-loading {
  padding: 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* ==================== Input header (label + count) ==================== */
.input-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.input-header label { margin-bottom: 0; }

/* ==================== Back link ==================== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 12px;
  transition: all var(--transition);
  padding: 6px 0;
}
.back-link:hover { color: var(--primary); text-decoration: none; }

/* Topic detail card wrapper */
.topic-card-detail {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.02);
  border: 1px solid rgba(0,0,0,.04);
  padding: 22px 24px;
  margin-bottom: 24px;
}

/* ==================== Meta inline helpers ==================== */
.meta-cat {
  color: var(--text-muted);
  font-size: 12px;
  text-decoration: none;
  font-weight: 500;
}
.meta-cat:hover { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.meta-time { color: var(--text-subtle); font-size: 12px; }

/* ==================== Category cards (categories.ejs) ==================== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}
.category-card {
  display: flex;
  flex-direction: row;
  align-items: center;
  padding: 12px 16px;
  border: 1px solid rgba(0,0,0,.04);
  border-radius: var(--radius-lg);
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.02);
  transition: transform 280ms cubic-bezier(.33,1,.68,1),
              box-shadow 280ms cubic-bezier(.33,1,.68,1),
              border-color 280ms ease;
}
.category-card:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.04);
  transform: translateY(-2px);
  border-color: rgba(124,58,237,.15);
}
.category-card:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}
.cat-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  font-weight: 900;
  color: #fff;
  flex-shrink: 0;
  margin-right: 12px;
}
.category-card:nth-child(6n+1) .cat-icon { background: var(--cat-accent-0); }
.category-card:nth-child(6n+2) .cat-icon { background: var(--cat-accent-1); }
.category-card:nth-child(6n+3) .cat-icon { background: var(--cat-accent-2); }
.category-card:nth-child(6n+4) .cat-icon { background: var(--cat-accent-3); }
.category-card:nth-child(6n+5) .cat-icon { background: var(--cat-accent-4); }
.category-card:nth-child(6n+6) .cat-icon { background: var(--cat-accent-5); }

.cat-info { flex: 1; min-width: 0; }
.cat-name-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
  min-width: 0;
}
.cat-name {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -.3px;
  white-space: nowrap;
  flex-shrink: 0;
}
.cat-desc-inline {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}

/* Category page description */
.cat-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.cat-page-header .page-title { margin-bottom: 6px; }
.cat-page-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  margin: 4px 0 20px;
  line-height: 1.55;
}
.cat-post-btn {
  flex-shrink: 0;
  white-space: nowrap;
}
.cat-meta-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.cat-count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-subtle);
  flex-shrink: 0;
}
.cat-latest {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* Topic list */
.topic-item {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
  border-radius: var(--radius-lg);
  margin: 0 -8px;
}
.topic-item:hover {
  background: rgba(124,58,237,.025);
  transform: translateX(4px);
}
.topic-item:last-child { border-bottom: none; }

.topic-link {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  transition: color var(--transition);
  display: block;
  margin-bottom: 6px;
  line-height: 1.45;
}
.topic-link:hover { color: var(--primary); text-decoration: none; }
.topic-item-title { display: inline; }
.topic-item-meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 12px;
  font-weight: 500;
}

/* ==================== Homepage feed ==================== */
.section-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--text-subtle);
  margin-bottom: 14px;
  padding-left: 2px;
  animation: fadeIn .4s .15s ease both;
}

/* Card-style post row */
.post-row {
  display: flex;
  align-items: stretch;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.02);
  border: 1px solid rgba(0,0,0,.04);
  overflow: hidden;
  margin-bottom: 10px;
  transition: transform 280ms cubic-bezier(.33,1,.68,1),
              box-shadow 280ms cubic-bezier(.33,1,.68,1),
              border-color 280ms ease;
}
.post-row:last-child { margin-bottom: 0; }
.post-row:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.04);
  border-color: rgba(124,58,237,.15);
}
.post-row:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}

/* Left accent bar */
.post-accent {
  width: 3px;
  flex-shrink: 0;
  background: var(--primary);
  transition: width 260ms cubic-bezier(.33,1,.68,1);
}
.post-row:hover .post-accent { width: 5px; }
.post-row:nth-child(5n+2) .post-accent { background: #8b5cf6; }
.post-row:nth-child(5n+3) .post-accent { background: #ec4899; }
.post-row:nth-child(5n+4) .post-accent { background: #f97316; }
.post-row:nth-child(5n+5) .post-accent { background: #06b6d4; }

/* Card body */
.post-body {
  flex: 1;
  padding: 18px 20px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  justify-content: center;
}
.post-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px;
}
.post-title {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
  transition: color 220ms ease;
  word-break: break-word;
  text-decoration: none;
}
.post-title:hover { color: var(--primary); text-decoration: none; }

/* Metadata line */
.post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 500;
  gap: 0;
}
.post-meta a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 180ms ease;
}
.post-meta a:hover { color: var(--primary); }
.post-meta time {
  font-variant-numeric: tabular-nums;
}
.post-cat {
  font-weight: 600;
}
.post-dot {
  display: inline-block;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-subtle);
  margin: 0 8px;
  flex-shrink: 0;
}

/* Empty card */
.empty-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 48px 20px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
  text-align: center;
}
.empty-card-icon { color: var(--text-subtle); opacity: .45; }
.empty-card p {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}
.empty-card span {
  font-size: 13px;
  color: var(--text-muted);
}
.empty-card strong { color: var(--primary); font-weight: 700; }
.empty-card a { color: var(--primary); text-decoration: none; font-weight: 600; }
.empty-card a:hover { text-decoration: underline; }

/* ==================== Topic detail ==================== */
.topic-title {
  font-size: 26px;
  font-weight: 900;
  margin-bottom: 12px;
  line-height: 1.35;
  letter-spacing: -.6px;
  color: var(--text);
}
.topic-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1.5px solid var(--border);
  gap: 0;
}
.topic-meta .author-link { font-weight: 700; }
.topic-meta .post-dot { margin: 0 8px; }
.topic-meta .meta-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-subtle);
}

.topic-body {
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text);
  margin-bottom: 28px;
  word-break: break-word;
}
.topic-body p { margin-bottom: 16px; }
.topic-body h1, .topic-body h2, .topic-body h3, .topic-body h4 { margin: 24px 0 12px; font-weight: 800; line-height: 1.3; }
.topic-body h1 { font-size: 24px; }
.topic-body h2 { font-size: 21px; }
.topic-body h3 { font-size: 18px; }
.topic-body ul, .topic-body ol { padding-left: 28px; margin-bottom: 16px; }
.topic-body li { margin-bottom: 6px; }
.topic-body pre {
  background: #1e1b2e;
  color: #e2e0e9;
  padding: 18px 24px;
  border-radius: var(--radius-lg);
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.7;
  margin: 16px 0;
}
.topic-body code {
  background: var(--primary-subtle);
  color: var(--primary-hover);
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  font-size: 13px;
  font-weight: 600;
}
.topic-body pre code { background: none; color: inherit; padding: 0; font-weight: 400; }
.topic-body blockquote {
  border-left: 4px solid var(--primary);
  padding: 12px 20px;
  color: var(--text-muted);
  background: var(--primary-subtle);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 18px 0;
}
.topic-body blockquote p:last-child { margin-bottom: 0; }
.topic-body img { max-width: 100%; border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.topic-body table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14px; }
.topic-body th, .topic-body td { padding: 10px 16px; border: 1px solid var(--border); text-align: left; }
.topic-body th { background: var(--bg); font-weight: 700; }

.topic-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 0;
  padding: 16px 20px;
  background: var(--primary-subtle);
  border-radius: var(--radius);
  align-items: center;
  border: 1px solid rgba(124,58,237,.08);
}
.topic-actions-group {
  display: flex;
  gap: 8px;
  align-items: center;
}
.topic-actions-group + .topic-actions-group {
  padding-left: 14px;
  border-left: 1.5px solid var(--primary-light);
}

/* Action button — distinct from global .btn */
.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px 18px;
  border: 1.5px solid var(--border);
  border-radius: 22px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  color: var(--text-muted);
  background: var(--surface);
  transition: all 240ms cubic-bezier(.33,1,.68,1);
  white-space: nowrap;
  line-height: 1.4;
}
.btn-action:hover {
  background: #fff;
  color: var(--text);
  border-color: var(--primary-light);
  box-shadow: 0 4px 12px rgba(124,58,237,.1);
  transform: translateY(-1px);
}
.btn-action:active { transform: scale(.96); }

/* Like button */
.btn-action-like {
  color: var(--text);
  font-weight: 700;
  gap: 4px;
  border-color: #fecaca;
}
.btn-action-like:hover {
  border-color: var(--danger);
  color: var(--danger);
  box-shadow: 0 2px 8px rgba(220,38,38,.15);
}
.btn-action-like.btn-liked {
  background: var(--danger-light);
  color: var(--danger);
  border-color: var(--danger);
  font-weight: 700;
}
.btn-action-like.btn-liked:hover {
  background: #fecaca;
  border-color: var(--danger-hover);
}

/* Active state (pinned/essenced) */
.btn-action-active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(124,58,237,.25);
}
.btn-action-active:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: #fff;
  box-shadow: 0 4px 12px rgba(124,58,237,.35);
}

/* Danger action */
.btn-action-danger {
  color: var(--danger);
  border-color: #fecaca;
}
.btn-action-danger:hover {
  background: var(--danger-light);
  color: var(--danger-hover);
  border-color: var(--danger);
  box-shadow: 0 2px 8px rgba(220,38,38,.15);
}

/* ==================== Badges ==================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .3px;
  vertical-align: middle;
}
.badge-pin, .badge-pinned { background: #fef3c7; color: #b45309; }
.badge-essence { background: #ede9fe; color: #6d28d9; }
.badge-admin { background: #fce7f3; color: #be185d; font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 6px; margin-left: 6px; vertical-align: middle; }

/* Author name link (public user profile) */
.author-link {
  color: var(--text-muted);
  font-weight: 600;
  text-decoration: none;
  transition: color .15s;
}
.author-link:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* ==================== Replies ==================== */
.reply-section { margin-top: 28px; }
.reply-section .section-label { margin-bottom: 16px; }
.reply-list { }

.reply-item {
  padding: 14px 20px;
  border: 1px solid rgba(0,0,0,.04);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.02);
  transition: box-shadow 280ms cubic-bezier(.33,1,.68,1),
              border-color 280ms ease,
              transform 280ms cubic-bezier(.33,1,.68,1);
  animation: fadeInUp .45s ease both;
}
.reply-item + .reply-item { margin-top: 10px; }
.reply-item:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.04);
  border-color: rgba(124,58,237,.12);
  transform: translateY(-1px);
}

.reply-header {
  display: flex;
  align-items: center;
  gap: 0;
  font-size: 13px;
  margin-bottom: 10px;
}
.reply-header .post-dot { margin: 0 7px; }
.reply-header .author-link {
  font-weight: 700;
  font-size: 13.5px;
}
.reply-time { color: var(--text-subtle); font-size: 12.5px; }
.reply-edited { color: var(--text-subtle); font-size: 11px; font-style: italic; }
.reply-floor {
  margin-left: auto;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-subtle);
  background: var(--bg);
  padding: 3px 10px;
  border-radius: 10px;
  border: 1px solid rgba(0,0,0,.06);
  flex-shrink: 0;
}
/* ==================== Avatar ==================== */
.text-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-right: 8px;
}
.reply-avatar-img {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  margin-right: 8px;
}
.reply-avatar-fallback {
  display: none;
  margin-right: 8px;
}


.reply-body {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
  word-break: break-word;
}
.reply-body p { margin-bottom: 12px; }
.reply-body p:last-child { margin-bottom: 0; }
.reply-body code { background: var(--primary-subtle); padding: 2px 7px; border-radius: 4px; font-size: 12px; color: var(--primary-hover); font-weight: 600; }
.reply-body pre {
  background: #1e1b2e;
  color: #e2e0e9;
  padding: 14px 18px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 12px;
  margin: 12px 0;
}
.reply-body pre code { background: none; color: inherit; padding: 0; font-weight: 400; }
.reply-body blockquote {
  border-left: 3px solid var(--primary);
  padding: 8px 16px;
  color: var(--text-muted);
  background: var(--primary-subtle);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 12px 0;
}
.reply-body img { max-width: 100%; border-radius: var(--radius-sm); }

.reply-actions {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(0,0,0,.04);
  display: flex;
  gap: 8px;
}
.reply-actions .btn-xs { font-size: 12px; padding: 4px 12px; }

/* ==================== Author ==================== */
.deleted-user { color: var(--text-subtle); font-style: italic; font-weight: 400; }

/* ==================== Pagination ==================== */
.pagination {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  justify-content: center;
  flex-wrap: wrap;
}
.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  background: var(--surface);
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.page-btn:hover {
  background: var(--primary-subtle);
  color: var(--primary);
  border-color: var(--primary);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.page-btn.disabled { color: var(--text-subtle); cursor: default; opacity: .4; pointer-events: none; }
.page-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(124,58,237,.3);
}
.page-info { font-size: 13px; color: var(--text-muted); font-weight: 500; }

/* ==================== Admin ==================== */
/* Admin top bar — "返回前台" link in admin pages */
.admin-top-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.admin-back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  padding: 5px 12px;
  border-radius: var(--radius-lg);
  background: var(--primary-subtle);
  transition: all .15s;
}
.admin-back-link:hover {
  background: #ede9fe;
  text-decoration: none;
}
.admin-top-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-muted);
}
.admin-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  margin-bottom: 24px;
  padding: 5px;
  background: var(--bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}
.admin-nav-link {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
  text-align: center;
}
.admin-nav-link:hover { background: var(--surface); color: var(--text); text-decoration: none; }
.admin-nav-link.active {
  background: var(--surface);
  color: var(--admin-accent);
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

/* ==================== Admin Log Filters ==================== */
.log-filters {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 20px 22px;
  margin-bottom: 20px;
  box-shadow: 0 4px 20px rgba(0,0,0,.07);
  animation: fadeInScale .35s ease both;
}
.log-filter-row {
  display: flex;
  gap: 10px;
  align-items: center;
}
.log-filter-row + .log-filter-row {
  margin-top: 12px;
}
.log-filter-row .input {
  font-size: 14px;
  padding: 9px 14px;
}
.log-filter-row select.input {
  appearance: auto;
  cursor: pointer;
}

@media (max-width: 768px) {
  .log-filters { padding: 14px 16px; border-radius: var(--radius-lg); }
  .log-filter-row { flex-wrap: wrap; gap: 8px; }
  .log-filter-row .input { font-size: 14px; padding: 8px 12px; min-width: 0 !important; }
  .log-filter-row .btn { font-size: 13px; padding: 8px 14px; }
}

/* ==================== Stats cards (admin dashboard) ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}
.stat-card {
  padding: 28px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--surface);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-slow);
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  transition: all var(--transition-slow);
}
.stat-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}
.stat-card:hover::before { width: 6px; }
.stat-card:nth-child(4n+1)::before { background: #6366f1; }
.stat-card:nth-child(4n+2)::before { background: #ec4899; }
.stat-card:nth-child(4n+3)::before { background: #f97316; }
.stat-card:nth-child(4n+4)::before { background: #10b981; }

.stat-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: .6px;
  margin-bottom: 10px;
}
.stat-value {
  font-size: 40px;
  font-weight: 900;
  color: var(--text);
  letter-spacing: -1.5px;
  line-height: 1;
}

/* ==================== Admin table ==================== */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  background: var(--surface);
}
.table {
  width: 100%;
  min-width: 0;
  border-collapse: collapse;
  font-size: 13px;
}
.table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 700;
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  background: var(--bg);
  border-bottom: 2px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1;
}
.table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.table tbody tr {
  background: var(--surface);
  transition: all var(--transition);
}
.table tbody tr:nth-child(even) { background: #fdfcf9; }
.table tbody tr:hover { background: var(--primary-subtle); }
.table tbody tr:last-child td { border-bottom: none; }

/* ==================== Admin Card List ==================== */
.admin-card-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.admin-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 12px;
}
.admin-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
}
.admin-card-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
}
.admin-card-body {
  flex: 1;
  min-width: 0;
}
.admin-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  word-break: break-word;
}
.admin-card-title a {
  color: var(--text);
  font-weight: 700;
}
.admin-card-title a:hover { color: var(--primary); }
.admin-card-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 3px;
  line-height: 1.5;
}
.admin-card-meta:first-child { margin-top: 0; }
.admin-card-sort {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex-shrink: 0;
}
.admin-card-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
  margin-left: auto;
}

/* Icon buttons (40x40px hit area, accessible on mobile) */
.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
  padding: 0;
  line-height: 1;
  position: relative;
}
.icon-btn:hover {
  background: var(--primary-subtle);
  border-color: var(--primary-light);
  color: var(--primary);
  transform: translateY(-1px);
}
.icon-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(124,58,237,.3);
}
.icon-btn-danger:hover {
  background: var(--danger-light);
  border-color: var(--danger);
  color: var(--danger);
}
.icon-btn:disabled {
  opacity: .3;
  cursor: default;
  transform: none;
  background: var(--surface);
  border-color: var(--border);
  color: var(--text-subtle);
}
.icon-btn-sm {
  width: 32px;
  height: 32px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

/* ==================== Toggle Switch ==================== */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 28px;
  flex-shrink: 0;
}
.toggle-switch input { display: none; }
.toggle-slider {
  position: absolute;
  inset: 0;
  border-radius: 14px;
  background: #d1d5db;
  cursor: pointer;
  transition: background var(--transition);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  left: 3px;
  top: 3px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,.15);
  transition: transform var(--transition);
}
.toggle-switch input:checked + .toggle-slider { background: var(--primary); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(20px); }

/* ==================== Settings Page ==================== */
.settings-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}
.settings-section-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1.5px solid var(--border);
}
.settings-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 0;
}
.settings-row + .settings-row {
  border-top: 1px solid var(--border);
}
.settings-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  min-width: 90px;
  flex-shrink: 0;
}
.settings-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: auto;
}
.settings-actions {
  margin-top: 24px;
  display: flex;
  justify-content: flex-end;
}
.form-success {
  display: none;
  background: var(--success-light);
  color: var(--success);
  padding: 12px 20px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
}
@media (max-width: 640px) {
  .settings-row { flex-wrap: wrap; gap: 10px; }
  .settings-label { min-width: 0; width: 100%; }
  .settings-hint { margin-left: 0; width: 100%; font-size: 11px; }
}

/* ==================== Bottom Tab Bar ==================== */
.tabbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: 56px;
  background: rgba(255,255,255,.92);
  border-top: 1px solid var(--border);
  z-index: 90;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 -1px 16px rgba(0,0,0,.04);
}
.tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  flex: 1;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 600;
  transition: all var(--transition);
  height: 56px;
  position: relative;
}
.tab:hover { color: var(--primary); text-decoration: none; }
.tab-active { color: var(--primary); font-weight: 800; }
.tab-icon { font-size: 20px; line-height: 1; }
.tab-icon svg { transition: transform var(--transition); }
.tab:hover .tab-icon svg { transform: scale(1.08); }
.tab-label { line-height: 1; }
.tab-icon-publish {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 28px;
  font-weight: 400;
  box-shadow: 0 6px 20px rgba(124,58,237,.4);
  transition: all var(--transition-slow);
}
.tab:hover .tab-icon-publish {
  transform: scale(1.12);
  box-shadow: 0 8px 28px rgba(124,58,237,.5);
}
.tab:active .tab-icon-publish { transform: scale(.96); }

/* Tab Badge */
.tab-badge {
  position: absolute;
  top: 6px;
  right: 50%;
  transform: translateX(20px);
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  background: #ef4444;
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 5px;
  line-height: 1;
  box-shadow: 0 2px 6px rgba(239,68,68,.4);
  animation: pulseGlow 2s ease-in-out infinite;
}

/* ==================== Profile ==================== */
.profile-header {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 20px;
  padding: 22px 18px;
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  animation: fadeInScale .4s ease both;
}
.profile-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 900;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(124,58,237,.3);
}
.profile-avatar-img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(124,58,237,.3);
}
.profile-avatar--fallback {
  box-shadow: 0 4px 12px rgba(124,58,237,.3);
}
.profile-info { flex: 1; min-width: 0; }
.profile-name-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 4px; }
.profile-name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.4px;
}
.profile-bio {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
}
.profile-username {
  display: block;
  font-size: 13px;
  color: var(--text-subtle);
  font-weight: 500;
  margin-top: 2px;
}
.profile-meta {
  font-size: 12px;
  color: var(--text-subtle);
  margin-top: 6px;
}

/* Profile section blocks */
.profile-section {
  margin-bottom: 20px;
}
.profile-section-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 8px;
  padding-left: 4px;
}
.profile-section--admin {
  margin-top: 8px;
}

/* Menu icons */
.menu-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--text-muted);
}

/* Disabled menu item */
.profile-menu-item--disabled {
  opacity: .45;
  cursor: not-allowed;
  pointer-events: none;
}
.profile-menu-item--disabled:hover {
  background: transparent;
  padding-left: 22px;
}
.menu-badge--muted {
  background: var(--text-subtle);
  color: #fff;
}
.menu-arrow--muted {
  color: var(--text-subtle);
}

/* Toggle switch placeholder */
.menu-toggle {
  margin-left: auto;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 10px;
  background: var(--success);
  color: #fff;
}
.menu-toggle--off {
  background: var(--text-subtle);
}

.profile-stats {
  display: flex;
  justify-content: space-around;
  padding: 16px 18px;
  margin-bottom: 20px;
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  animation: fadeInScale .4s .1s ease both;
}
.stat-item {
  text-align: center;
  transition: transform var(--transition);
}
.stat-num {
  display: block;
  font-size: 22px;
  font-weight: 900;
  color: var(--text);
  letter-spacing: -.5px;
}
.stat-item .stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  text-transform: none;
  letter-spacing: 0;
}

.profile-menu {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  margin-bottom: 20px;
  overflow: hidden;
}
.profile-menu-item {
  display: flex;
  align-items: center;
  padding: 14px 18px;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}
.profile-menu-item:last-child { border-bottom: none; }
.profile-menu-item:hover {
  background: var(--primary-subtle);
  text-decoration: none;
  padding-left: 26px;
}
.menu-badge {
  margin-left: auto;
  margin-right: 8px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg);
  padding: 3px 12px;
  border-radius: 10px;
  font-weight: 700;
}
.menu-arrow { font-size: 20px; color: var(--text-subtle); }

/* My topics scroll container */
.my-topics-scroll {
  max-height: 420px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 0 16px;
  box-shadow: var(--shadow-sm);
}
.my-topics-scroll .topic-item:first-child { margin-top: 4px; }
.my-topics-scroll .topic-item:last-child { border-bottom: none; }

/* Likes list items */
.likes-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.like-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
  transition: all var(--transition);
}
.like-item:hover {
  background: var(--primary-subtle);
  text-decoration: none;
}
.like-item-type { flex-shrink: 0; padding-top: 2px; }
.like-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
  letter-spacing: .3px;
}
.like-badge--topic { background: #ede9fe; color: #7c3aed; }
.like-badge--reply { background: #d1fae5; color: #059669; }
.like-item-body { flex: 1; min-width: 0; }
.like-item-title {
  display: block;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 4px;
}
.like-item-meta {
  font-size: 12px;
  color: var(--text-muted);
}

/* Logout section — separated from main content */
.profile-logout-section {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 2px solid var(--border);
}
.btn-logout {
  color: var(--danger);
  font-weight: 600;
  max-width: 320px;
  margin: 0 auto;
}
.btn-logout:hover {
  background: var(--danger-light);
  color: var(--danger-hover);
  border-color: var(--danger);
  box-shadow: 0 4px 16px rgba(220,38,38,.15);
}

/* Settings page — inline field editing */
.settings-field {
  padding: 14px 18px;
}
.settings-field-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 6px;
}
.settings-field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.settings-field-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
}
.settings-field-edit {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.settings-field-edit .input {
  width: 100%;
  max-width: 360px;
}
.settings-field-actions {
  display: flex;
  gap: 8px;
}

/* ==================== Avatar Mode Tabs (profile编辑) ==================== */
.avatar-mode-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 10px;
}
.avatar-mode-tab {
  flex: 1;
  padding: 6px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  text-align: center;
}
.avatar-mode-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.avatar-panel {
  margin-bottom: 8px;
}
.avatar-upload-row,
.avatar-qq-row {
  display: flex;
  gap: 8px;
  align-items: center;
}
.avatar-upload-row .file-input,
.avatar-qq-row .input {
  flex: 1;
}
.file-input {
  font-size: 13px;
  color: var(--text-muted);
}
.file-input::file-selector-button {
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 12px;
  cursor: pointer;
  margin-right: 8px;
}
.avatar-qq-row .input {
  flex: 1;
}
.avatar-qq-helper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  padding: 6px 10px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-muted);
}
.avatar-status {
  font-size: 12px;
  color: var(--danger);
  margin-top: 4px;
}
.avatar-preview-container {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
  min-height: 52px;
}
.avatar-preview-wrap {
  position: relative;
  display: inline-flex;
}
.avatar-preview-wrap img {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary-light, rgba(124,58,237,.3));
}
.avatar-preview-clear {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: none;
  background: var(--danger);
  color: #fff;
  font-size: 12px;
  line-height: 18px;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.avatar-current-tag {
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-subtle);
  color: #fff;
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 10px;
  line-height: 1.4;
}

/* ==================== Static Pages ==================== */
.static-page-content {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 28px 24px;
  box-shadow: var(--shadow-lg);
  line-height: 1.7;
}
.static-page-content h3 {
  font-size: 16px;
  font-weight: 700;
  margin-top: 20px;
  margin-bottom: 6px;
}
.static-page-content p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.static-page-content ul {
  margin: 8px 0 16px 20px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
.static-page-content ul li {
  margin-bottom: 4px;
}

/* ==================== Modal ==================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn .25s ease;
}
.modal-content {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 24px;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow-xl);
  animation: fadeInScale .3s cubic-bezier(.4,0,.2,1);
}
.modal-title { font-size: 17px; font-weight: 800; margin-bottom: 16px; }
.modal-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 20px; }
.modal-body-text { font-size: 14.5px; color: var(--text-muted); line-height: 1.7; margin-bottom: 4px; }
.modal-confirm-danger .modal-title { color: var(--danger); }

/* ==================== Toast ==================== */
.toast-container {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  width: calc(100% - 32px);
  max-width: 380px;
}
.toast-item {
  padding: 12px 22px;
  border-radius: var(--radius-lg);
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  box-shadow: 0 4px 20px rgba(0,0,0,.18);
  text-align: center;
  line-height: 1.5;
  pointer-events: auto;
  cursor: default;
  animation: toastSlideIn .35s cubic-bezier(.4,0,.2,1);
}
.toast-success { background: var(--admin-accent); }
.toast-error { background: var(--danger); }
.toast-out {
  animation: toastSlideOut .3s cubic-bezier(.4,0,1,1) forwards;
}

@keyframes toastSlideIn {
  from { opacity: 0; transform: translateY(-18px) scale(.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes toastSlideOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(-18px) scale(.95); }
}

/* ==================== Notification / Message List ==================== */
.notif-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.notif-header .section-label { margin-bottom: 0; }

/* Message card — unified card system */
.notif-msg-card {
  display: block;
  padding: 14px 20px;
  border-radius: var(--radius-lg);
  margin-bottom: 8px;
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
  transition: transform 280ms cubic-bezier(.33,1,.68,1),
              box-shadow 280ms cubic-bezier(.33,1,.68,1),
              border-color 280ms ease;
  position: relative;
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.02);
  border: 1px solid rgba(0,0,0,.04);
  animation: fadeInUp .4s ease both;
  cursor: pointer;
}
.notif-msg-card:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.04);
  border-color: rgba(124,58,237,.12);
  transform: translateY(-2px);
}
.notif-msg-card:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}

/* Unread indicator — subtle left dot */
.notif-msg-card.notif-unread::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}
.notif-msg-card.notif-unread { padding-left: 28px; }

/* Type color bar — 3px left accent */
.notif-msg-type-system { border-left: 3px solid var(--primary); }
.notif-msg-type-reply  { border-left: 3px solid #2563eb; }
.notif-msg-type-like   { border-left: 3px solid #dc2626; }
.notif-msg-card:hover { border-left-width: 5px; }

/* System message — subtle tint only for quick scanning */
.notif-msg-system {
  background: rgba(124,58,237,.03);
}
.notif-msg-system:hover {
  background: rgba(124,58,237,.05);
}

/* Message card row */
.notif-msg-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Message icon */
.notif-msg-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--text-muted);
}

/* Colored icon variants */
.notif-msg-icon--reply { color: #2563eb; }
.notif-msg-icon--like { color: #dc2626; }
.notif-msg-icon--bell { color: var(--primary); }

/* Main content area */
.notif-msg-main {
  flex: 1;
  min-width: 0;
}
.notif-msg-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}
.notif-msg-actor { font-weight: 700; color: var(--primary); }
.notif-msg-action { color: var(--text); }
.notif-msg-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 3px;
}
.notif-msg-time {
  font-size: 11.5px;
  color: var(--text-subtle);
  flex-shrink: 0;
  font-weight: 500;
  margin-left: auto;
}
.notif-msg-expand {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 280ms cubic-bezier(.33,1,.68,1);
}

/* System message body — expand/collapse */
.notif-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s cubic-bezier(.4,0,.2,1);
  font-size: 13.5px;
  color: var(--text);
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}
.notif-body--open {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(0,0,0,.04);
}

/* Scope filter pills + delete button + time group — see Notifications Enhancement section below */

/* ==================== Placeholder ==================== */
.placeholder-card {
  text-align: center;
  padding: 64px 20px;
}
.placeholder-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.placeholder-hint {
  font-size: 14px;
  color: var(--text-subtle);
}

/* ==================== Footer ==================== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 16px 16px;
  text-align: center;
  font-size: 12px;
  color: var(--text-subtle);
  background: var(--surface);
}

/* ==================== System message form (admin) ==================== */
.form-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  animation: fadeInScale .35s ease both;
}
.radio-group { display: flex; gap: 24px; }
.radio-label { display: flex; align-items: center; gap: 7px; cursor: pointer; font-size: 14px; font-weight: 600; }
.radio-label input[type="radio"] { accent-color: var(--primary); width: 18px; height: 18px; }
.search-row { display: flex; gap: 10px; }
.search-row .input { flex: 1; }
.user-search-results { margin-top: 8px; }
.user-search-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 14px;
}
.user-search-item:hover { background: var(--primary-subtle); }
.user-list-scroll {
  margin-top: 10px;
  max-height: 280px;
  overflow-y: auto;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.user-list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}
.user-list-item:last-child { border-bottom: none; }
.user-list-item:hover { background: var(--primary-subtle); }
.user-list-item.selected {
  background: var(--primary);
  color: #fff;
  font-weight: 700;
}
.user-list-item.selected .text-muted { color: rgba(255,255,255,.6); }
.user-list-item.selected .user-avatar-mini {
  background: rgba(255,255,255,.25);
  color: #fff;
}
.user-avatar-mini {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.selected-user {
  margin-top: 10px;
  padding: 10px 14px;
  background: var(--primary-subtle);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--primary);
  font-weight: 700;
}
.form-actions { margin-top: 24px; text-align: right; }

/* ==================== Message history ==================== */
.history-list { margin-top: 14px; }
.history-item {
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  margin-bottom: 10px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.history-item:hover {
  box-shadow: var(--shadow);
  border-color: var(--primary-light);
}
.history-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.history-meta {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==================== Admin filter row ==================== */
.admin-filter-row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

/* ==================== Utilities ==================== */
.loading {
  text-align: center;
  padding: 48px 0;
  color: var(--text-subtle);
  font-size: 14px;
}
.empty-tip {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-subtle);
  font-size: 14px;
}

/* Admin role badge */
.admin-role-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--primary-subtle);
  color: var(--primary);
  vertical-align: middle;
  margin-left: 6px;
}
.admin-role-badge--admin {
  background: var(--admin-accent-bg);
  color: var(--admin-accent);
}
.text-muted { color: var(--text-muted); }
hr { border: none; border-top: 2px solid var(--border); margin: 32px 0; }

/* ==================== Filter Tabs (home category filter) ==================== */
.filter-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 4px;
}
.filter-tabs::-webkit-scrollbar { display: none; }
.filter-tab {
  flex-shrink: 0;
  padding: 10px 24px;
  border-radius: 24px;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-subtle);
  border: 1.5px solid var(--primary-light);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}
.filter-tab:hover {
  background: var(--primary-light);
  color: var(--primary-hover);
  text-decoration: none;
  transform: translateY(-1px);
}
.filter-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  font-weight: 700;
  box-shadow: 0 6px 20px rgba(124,58,237,.35);
}

/* ==================== Responsive ==================== */
@media (max-width: 640px) {
  .site-header { padding: 0 12px; }
  .header-inner { height: 50px; gap: 10px; }
  body { padding-top: 50px; }
  .main-content { padding: 18px 14px 0; }
  .hero { margin: -18px -14px 0; }
  .site-logo { font-size: 16px; }
  .nav-link { padding: 4px 8px; font-size: 13px; }
  .hero { padding: 34px 14px 30px; min-height: 170px; }
  .hero-title { font-size: 24px; }
  .hero-sub { font-size: 13px; }
  .hero-badge { font-size: 10px; padding: 3px 12px; }
  .hero::before { width: 140px; height: 140px; top: -30px; right: -30px; }
  .hero::after { width: 90px; height: 90px; bottom: -15px; left: -15px; }
  .section-label { margin-bottom: 14px; font-size: 12px; }
  .post-body { padding: 14px 16px; }
  .post-title { font-size: 14.5px; }
  .post-meta { font-size: 11.5px; }
  .post-dot { margin: 0 6px; }
  .category-grid { grid-template-columns: 1fr; gap: 10px; }
  .category-card { padding: 12px 14px; }
  .cat-icon { width: 38px; height: 38px; font-size: 17px; }
  .cat-name { font-size: 15px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat-card { padding: 20px; }
  .stat-value { font-size: 32px; }
  .topic-title { font-size: 22px; }
  .page-title { font-size: 22px; }
  .topic-body { font-size: 14.5px; }
  .topic-meta { font-size: 12px; }
  .topic-item { padding: 14px 16px; }
  .topic-card-detail { padding: 20px 16px; }
  .reply-header { flex-wrap: wrap; gap: 6px; }
  .table td, .table th { padding: 10px 14px; }
  .btn { padding: 8px 16px; font-size: 13px; }
  .input { padding: 10px 14px; }
  .form { padding: 24px; }
  .profile-header { padding: 22px 18px; }
  .profile-avatar { width: 56px; height: 56px; font-size: 26px; }
  .profile-avatar-img { width: 56px; height: 56px; }
  .profile-name { font-size: 18px; }
  .admin-nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    padding: 4px;
    overflow-x: visible;
  }
  .admin-nav-link { padding: 8px 4px; font-size: 12px; white-space: normal; flex-shrink: initial; }
  .main-content { padding: 20px 14px 56px; }
  .main-content--no-tab { padding-bottom: 20px; }
}

@media (min-width: 1200px) {
  :root { --max-w: 1100px; }
  .category-grid { grid-template-columns: repeat(3, 1fr); }
  .hero { min-height: 240px; }
  .hero-title { font-size: 36px; }
  .hero-sub { font-size: 16px; }
  .post-title { font-size: 17px; }
  .topic-body { font-size: 16px; line-height: 1.95; }
}

/* ==================== Search ==================== */
.search-box {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.02);
  border: 1px solid rgba(0,0,0,.04);
  margin-bottom: 24px;
}

.search-input-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-icon {
  color: var(--text-subtle);
  flex-shrink: 0;
}

.search-field {
  flex: 1;
  border: none;
  outline: none;
  font-size: 16px;
  color: var(--text);
  background: transparent;
  font-family: inherit;
  min-width: 0;
}

.search-field::placeholder {
  color: var(--text-subtle);
}

.search-submit-btn {
  flex-shrink: 0;
}

.search-scope {
  display: flex;
  gap: 6px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(0,0,0,.04);
  flex-wrap: wrap;
}

.scope-item {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid rgba(0,0,0,.08);
  cursor: pointer;
  transition: all 240ms cubic-bezier(.33,1,.68,1);
  font-family: inherit;
  white-space: nowrap;
}

.scope-item:hover {
  color: var(--primary);
  border-color: rgba(124,58,237,.25);
  background: var(--primary-subtle);
}

.scope-item.active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

.search-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  margin-top: 14px;
  border-top: 1px solid rgba(0,0,0,.04);
  flex-wrap: wrap;
  gap: 10px;
}

.search-sort-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.sort-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-right: 2px;
}

.sort-item {
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 240ms cubic-bezier(.33,1,.68,1);
  font-family: inherit;
}

.sort-item:hover {
  color: var(--primary);
  background: var(--primary-subtle);
}

.sort-item.active {
  color: var(--primary);
  background: var(--primary-subtle);
  font-weight: 600;
}

.search-count {
  font-size: 13px;
  color: var(--text-subtle);
  white-space: nowrap;
}

/* Search result card — unified card system + accent bar */
.search-result-card {
  display: block;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 14px 20px;
  margin-bottom: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.02);
  border: 1px solid rgba(0,0,0,.04);
  border-left: 3px solid var(--primary);
  text-decoration: none;
  color: inherit;
  transition: transform 280ms cubic-bezier(.33,1,.68,1),
              box-shadow 280ms cubic-bezier(.33,1,.68,1),
              border-color 280ms ease,
              border-left-width 260ms cubic-bezier(.33,1,.68,1);
}

.search-result-card:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.04);
  border-color: rgba(124,58,237,.15);
  border-left-width: 5px;
  color: inherit;
  transform: translateY(-2px);
}
.search-result-card:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}

/* Accent color cycling */
.search-result-card:nth-child(5n+2) { border-left-color: #8b5cf6; }
.search-result-card:nth-child(5n+3) { border-left-color: #ec4899; }
.search-result-card:nth-child(5n+4) { border-left-color: #f97316; }
.search-result-card:nth-child(5n+5) { border-left-color: #06b6d4; }

.search-result-header {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 8px;
}

.search-result-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
  flex: 1;
}

.search-result-badges {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
  margin-top: 1px;
}

.search-result-preview {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-result-meta {
  display: flex;
  align-items: center;
  gap: 0;
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 500;
}
.search-result-meta a { color: var(--text-muted); text-decoration: none; }
.search-result-meta a:hover { color: var(--primary); }

.search-result-cat {
  font-weight: 600;
  color: var(--primary);
}

.search-result-author {
  color: var(--text-muted);
}

.sr-stat {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  color: var(--text-subtle);
}
.sr-stat svg { opacity: .45;   flex-shrink: 0;
}
.cat-chip-disabled {
  opacity: .45;
  cursor: not-allowed;
}
.cat-chip-disabled:hover {
  border-color: var(--border);
  background: var(--surface);
  transform: none;
  box-shadow: none;
}
.cat-chip-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--warning-soft, #fef3c7);
  color: var(--warning, #b45309);
  font-weight: 600;
  margin-left: 4px;
  white-space: nowrap;
}

.search-result-time {
  color: var(--text-subtle);
}

.search-highlight {
  background: #fef08a;
  color: var(--text);
  border-radius: 2px;
  padding: 0 1px;
}

@media (max-width: 768px) {
  .search-box { padding: 16px; border-radius: var(--radius); }
  .search-field { font-size: 15px; }
  .search-scope { gap: 6px; padding-top: 12px; margin-top: 12px; }
  .scope-item { padding: 5px 12px; font-size: 12px; }
  .search-result-card { padding: 14px 16px; }
  .search-result-title { font-size: 15px; }
  .search-result-preview { font-size: 13px; }
  .search-result-meta { font-size: 12px; flex-wrap: wrap; }
  .search-toolbar { flex-direction: column; align-items: flex-start; }
  .search-sort-group { gap: 4px; }
  .sort-item { padding: 3px 10px; font-size: 12px; }
}

/* ==================== Notifications Enhancement ==================== */

.notif-delete-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-subtle);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 200ms ease, background 200ms ease, color 200ms ease;
  padding: 0;
  z-index: 2;
}
.notif-msg-card:hover .notif-delete-btn,
.notif-delete-btn:focus {
  opacity: 1;
}
.notif-delete-btn:hover {
  background: var(--danger-light);
  color: var(--danger);
}

/* Time group header */
.time-group-header {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: .6px;
  padding: 8px 4px 6px;
  margin-top: 4px;
}
.time-group-header:first-child {
  margin-top: 0;
  padding-top: 0;
}

@media (max-width: 768px) {
  .notif-msg-card { padding: 14px 16px; }
  .notif-msg-card.notif-unread { padding-left: 24px; }
  .notif-msg-type-system,
  .notif-msg-type-reply,
  .notif-msg-type-like { border-left-width: 3px; }
  .notif-msg-row { gap: 10px; }
  .notif-body--open { margin-top: 10px; padding-top: 10px; }
}

/* ==================== Admin Dashboard Charts ==================== */
.dash-refresh-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  margin-bottom: 16px;
  padding: 6px 0;
}

.dash-refresh-text {
  font-size: 12px;
  color: var(--text-subtle);
}

.chart-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.chart-row-wide {
  grid-template-columns: 1fr;
}

.chart-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  min-width: 0;
}

.chart-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 12px;
  letter-spacing: .3px;
}

.chart-wrap {
  position: relative;
  width: 100%;
}

.chart-row-wide .chart-wrap {
  height: 280px;
}

.chart-row:not(.chart-row-wide) .chart-wrap {
  height: 200px;
}

/* ─── 设置页标签页 ─── */
.settings-tabs {
  display: flex; gap: 0; margin-bottom: 24px; border-bottom: 2px solid var(--border);
}
.settings-tab {
  padding: 10px 24px; font-size: 14px; font-weight: 600; color: var(--text-muted);
  background: none; border: none; border-bottom: 2px solid transparent;
  margin-bottom: -2px; cursor: pointer; transition: .2s;
}
.settings-tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.settings-tab:hover { color: var(--text-primary); }
.settings-panel { display: none; }
.settings-panel.active { display: block; }

/* ─── Logo 双模式 ─── */
.logo-field { }
.logo-mode-tabs { display: flex; gap: 0; margin-bottom: 8px; }
.logo-mode-btn {
  padding: 6px 16px; font-size: 12px; font-weight: 600; color: var(--text-muted);
  background: var(--bg-secondary); border: 1px solid var(--border); cursor: pointer;
  transition: .2s;
}
.logo-mode-btn:first-child { border-radius: var(--radius) 0 0 var(--radius); }
.logo-mode-btn:last-child { border-radius: 0 var(--radius) var(--radius) 0; }
.logo-mode-btn.active {
  color: #fff; background: var(--primary); border-color: var(--primary);
}
.logo-mode-btn:hover:not(.active) { border-color: var(--primary); color: var(--primary); }
.logo-input { margin-top: 6px; }

/* ─── 邮件管理 ─── */
.email-account-card {
  padding: 14px 18px; border-radius: var(--radius-lg); margin-bottom: 12px;
  border: 1px solid var(--border); background: var(--bg-secondary);
}
.email-account-ok { border-left: 3px solid var(--admin-accent); }
.email-account-warn { border-left: 3px solid var(--danger); }
.email-account-idle { border-left: 3px solid var(--text-muted); }
.email-account-header {
  display: flex; align-items: center; gap: 12px; margin-bottom: 6px;
}
.email-account-label {
  font-size: 12px; font-weight: 700; color: #fff; background: var(--primary);
  padding: 2px 8px; border-radius: 4px;
}
.email-account-user { font-weight: 600; font-size: 14px; }
.email-account-host { font-size: 12px; color: var(--text-muted); }
.email-account-stats {
  display: flex; gap: 20px; font-size: 13px; color: var(--text-muted);
  margin: 4px 0;
}
.email-account-error {
  font-size: 12px; color: var(--danger); margin-top: 4px;
  padding: 6px 10px; background: #fef2f2; border-radius: 4px;
  word-break: break-all;
}
.email-history {
  margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--border);
}
.email-history-item {
  font-size: 12px; color: var(--text-muted); padding: 2px 0;
}

@media (max-width: 768px) {
  .chart-row { grid-template-columns: 1fr; gap: 12px; }
  .chart-row-wide .chart-wrap { height: 240px; }
  .chart-row:not(.chart-row-wide) .chart-wrap { height: 180px; }
  .chart-card { padding: 14px 16px; }
  .chart-title { font-size: 12px; margin-bottom: 10px; }
  .dash-refresh-bar { margin-bottom: 12px; }
}