/* ============================================================
   Theme system for the Chainsync CMS.
   「白底 × logo 深蓝」—— 白底 / 深蓝主调 / 天蓝点缀
   ============================================================ */

/* ---------- Semantic surface variables (light defaults) ---------- */
:root {
  --bg-page:   #FFFFFF;   /* white */
  --bg-alt:    #F8FAFC;   /* slate 50 */
  --bg-tint:   #F1F5F9;   /* slate 100 */
  --bg-card:   #FFFFFF;   /* card surfaces */
  --bg-footer: #0E449A;   /* logo deep blue */
  --color-primary: #0E449A;
  --color-primary-dark: #0A377F;
  --color-primary-light: #0797D4;
  --color-accent: #0E449A;
  --color-accent-light: #0797D4;
  --color-ink: #0F172A;
  --color-text-primary: #1E293B;
  --color-text-secondary: #64748B;
  --color-text-light: #94A3B8;
  --color-border: #E2E8F0;
  --color-surface-white: #FFFFFF;
  --color-surface-lightgray: #F8FAFC;
  --color-surface-lightblue: #F1F5F9;
  --color-surface-dark: #0E449A;
  --color-text-white: #FFFFFF;
  --color-cream: #FFFFFF;
  --color-warm-gray: #F8FAFC;
}

/* ---------- Dark palette ---------- */
[data-theme="dark"] {
  --color-surface-white:   #0F172A;
  --color-text-primary:    #E2E8F0;
  --color-text-secondary:  #94A3B8;
  --color-border:          #1E293B;

  --bg-page:   #0F172A;
  --bg-alt:    #1E293B;
  --bg-tint:   #1E293B;
  --bg-card:   #1E293B;
  --bg-footer: #0A377F;
}

/* ---------- Helper surface classes ---------- */
.bg-page   { background: var(--bg-page); }
.bg-alt    { background: var(--bg-alt); }
.bg-tint   { background: var(--bg-tint); }
.bg-footer { background: var(--bg-footer); }

/* ---------- Public-site component dark overrides ---------- */
[data-theme="dark"] .biz-card,
[data-theme="dark"] .case-card,
[data-theme="dark"] .news-card,
[data-theme="dark"] .client-logo {
  background: var(--bg-card);
  border-color: var(--color-border);
}
[data-theme="dark"] .biz-card-title,
[data-theme="dark"] .case-img-title,
[data-theme="dark"] .news-title,
[data-theme="dark"] .about-title {
  color: var(--color-text-primary);
}
[data-theme="dark"] .biz-card-desc,
[data-theme="dark"] .case-desc,
[data-theme="dark"] .news-desc,
[data-theme="dark"] .about-desc,
[data-theme="dark"] .stat-label,
[data-theme="dark"] .client-logo-text {
  color: var(--color-text-secondary);
}
[data-theme="dark"] .biz-card-tag,
[data-theme="dark"] .news-tag,
[data-theme="dark"] .about-tag {
  color: var(--color-primary-light);
  background: rgba(14,68,154,0.12);
  border-color: rgba(14,68,154,0.2);
}
[data-theme="dark"] .footer-link { color: #94A3B8; }
[data-theme="dark"] .btn-ghost { background: #1E293B; color: var(--text); }
[data-theme="dark"] table.tbl th { background: #1E293B; }

/* ---------- Admin UEditor dark overrides ---------- */
[data-theme="dark"] .ue-host .edui-editor {
  border-color: var(--color-border);
  background: var(--bg-card);
}
[data-theme="dark"] .ue-host .edui-editor .edui-editor-toolbarboxouter {
  background: #1E293B;
  border-bottom-color: var(--color-border);
}
[data-theme="dark"] .ue-host .edui-editor .edui-editor-body { background: var(--bg-card); }
[data-theme="dark"] .ue-host .edui-editor .edui-editor-bottombar { background: #1E293B; }
[data-theme="dark"] .ue-host .edui-editor .edui-editor-bottomContainer td {
  border-top-color: var(--color-border);
  color: var(--color-text-light);
}

/* ============================================================
   Search button
   ============================================================ */
.search-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all 0.25s ease;
  flex-shrink: 0;
  padding: 0;
}
.search-btn:hover {
  background: var(--bg-alt);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.search-btn svg { width: 17px; height: 17px; }

/* ============================================================
   Site-wide search overlay
   ============================================================ */
/* BUG FIX: The `hidden` attribute on .search-overlay was being
   overridden by `display:flex`, causing the invisible overlay
   to block all clicks on the admin panel. Fix: use visibility
   + pointer-events instead. */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.22s ease, visibility 0.22s ease;
}
.search-overlay.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.search-overlay[hidden] {
  display: flex;
  visibility: hidden;
  pointer-events: none;
}
.search-overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(24,24,27,0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.search-modal {
  position: relative;
  width: min(520px, 92vw);
  background: var(--bg-card, #ffffff);
  border: 1px solid var(--color-border, #E2E8F0);
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 24px 60px rgba(24,24,27,0.15);
}
.search-modal form {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 2px solid var(--color-primary, #0E449A);
  padding-bottom: 12px;
  margin-right: 36px;
}
.search-modal-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-text-light, #94A3B8);
}
.search-modal input[data-search-input] {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  font-size: 1.05rem;
  font-family: inherit;
  color: var(--color-text-primary, #0F172A);
  background: transparent;
}
.search-modal input[data-search-input]::placeholder {
  color: var(--color-text-light, #94A3B8);
  opacity: 0.8;
}
.search-modal-go {
  flex-shrink: 0;
  padding: 8px 20px;
  border-radius: 8px;
  border: none;
  background: var(--color-primary, #0E449A);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s ease;
}
.search-modal-go:hover { background: var(--color-accent-light, #0797D4); }
.search-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--color-text-light, #94A3B8);
  font-size: 1.05rem;
  cursor: pointer;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, color 0.2s ease;
}
.search-close:hover {
  background: var(--bg-alt, #F8FAFC);
  color: var(--color-ink, #0F172A);
}
[data-theme="dark"] .search-modal {
  background: var(--bg-card);
  border-color: var(--color-border);
}
[data-theme="dark"] .search-modal input[data-search-input] { color: var(--color-text-primary); }

/* ============================================================
   Smooth theme transition
   ============================================================ */
body,
.navbar,
.biz-card,
.case-card,
.news-card,
.client-logo,
.xt-table,
.footer,
.detail-section-white,
.detail-section-tint,
.related-card,
.meta-pill,
.detail-lead,
.back-btn {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* ---------- Login screen ---------- */
[data-theme="dark"] .login-card {
  background: #1E293B;
  border: 1px solid #1E293B;
}
[data-theme="dark"] .login-card h1 { color: #E2E8F0; }
[data-theme="dark"] .login-card p.sub { color: #94A3B8; }
[data-theme="dark"] .login-card label { color: #E2E8F0; }
[data-theme="dark"] .login-card input {
  background: #0F172A;
  color: #E2E8F0;
  border-color: #1E293B;
}

/* ---------- Search modal hint ---------- */
.search-modal-hint {
  margin: 12px 2px 2px;
  font-size: 0.78rem;
  color: var(--color-text-secondary, #64748B);
}