/* ============================================================
   global.css — 2048 Games Online
   Light mode default · Dark mode via [data-theme="dark"]
   Design tokens · Layout shell · Header · Footer · Cards · Buttons
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ─── Tokens — Light mode (DEFAULT) ─────────────────────────── */
:root {
  /* Colors */
  --color-bg:           #f2f2f7;
  --color-surface:      #ffffff;
  --color-surface-2:    #f7f7fa;
  --color-surface-3:    #efeff4;
  --color-border:       #e4e4eb;
  --color-border-2:     #d0d0da;
  --color-accent:       #f97316;
  --color-accent-dark:  #ea6a0a;
  --color-accent-light: #fff4ee;
  --color-accent-2:     #f59e0b;
  --color-text:         #1c1c1e;
  --color-text-muted:   #6b6b78;
  --color-text-dim:     #aeaeb2;
  --color-success:      #16a34a;
  --color-danger:       #dc2626;

  /* Shadows */
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.07), 0 0 0 1px rgba(0,0,0,0.04);
  --shadow-md:    0 4px 16px rgba(0,0,0,0.09), 0 1px 4px rgba(0,0,0,0.05);
  --shadow-lg:    0 8px 32px rgba(0,0,0,0.12), 0 2px 8px rgba(0,0,0,0.06);
  --shadow-accent: 0 4px 20px rgba(249,115,22,0.35);

  /* Header */
  --color-header-bg:     rgba(255,255,255,0.92);
  --color-header-border: rgba(0,0,0,0.10);
  --color-header-shadow: 0 1px 0 rgba(0,0,0,0.06), 0 2px 12px rgba(0,0,0,0.05);

  /* Typography */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Sizing */
  --radius-sm:   8px;
  --radius-md:   12px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 140ms;
  --dur-base: 220ms;
  --dur-slow: 360ms;

  /* Layout */
  --header-h:      72px;
  --container-max: 1200px;
  --container-pad: clamp(16px, 4vw, 48px);
}

/* ─── Dark mode override ─────────────────────────────────────── */
[data-theme="dark"] {
  --color-bg:           #090d16;
  --color-surface:      #111827;
  --color-surface-2:    #1a2236;
  --color-surface-3:    #1e2b40;
  --color-border:       rgba(255,255,255,0.08);
  --color-border-2:     rgba(255,255,255,0.14);
  --color-accent:       #f97316;
  --color-accent-dark:  #ea6a0a;
  --color-accent-light: rgba(249,115,22,0.12);
  --color-accent-2:     #f6c90e;
  --color-text:         #e8edf5;
  --color-text-muted:   #8b95a8;
  --color-text-dim:     #3d4a60;

  --shadow-sm:    0 1px 4px rgba(0,0,0,0.5);
  --shadow-md:    0 4px 20px rgba(0,0,0,0.55);
  --shadow-lg:    0 8px 48px rgba(0,0,0,0.65);
  --shadow-accent: 0 4px 24px rgba(249,115,22,0.4);

  --color-header-bg:     rgba(9,13,22,0.94);
  --color-header-border: rgba(255,255,255,0.09);
  --color-header-shadow: 0 1px 0 rgba(255,255,255,0.05), 0 2px 16px rgba(0,0,0,0.4);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--dur-base), color var(--dur-base);
}

img, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }

/* ─── Page Wrapper ───────────────────────────────────────────── */
.page-wrap { display: flex; flex-direction: column; min-height: 100vh; }
main { flex: 1; }

/* ─── Container ──────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* ─── Header ─────────────────────────────────────────────────── */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--color-header-bg);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  border-bottom: 1px solid var(--color-header-border);
  box-shadow: var(--color-header-shadow);
  transition: background var(--dur-base), border-color var(--dur-base), box-shadow var(--dur-base);
}

/* Dark-mode gaming accent line at the bottom */
[data-theme="dark"] #site-header {
  background: linear-gradient(90deg, #0c0f1a 0%, #141829 40%, #1a1530 70%, #0c0f1a 100%);
  border-bottom: 1px solid rgba(249,115,22,0.12);
  box-shadow: 0 1px 0 rgba(249,115,22,0.08), 0 4px 24px rgba(0,0,0,0.4);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

/* Subtle inner wash — light mode: neutral, dark mode: orange tint */
#site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(0,0,0,0.01) 30%,
    rgba(0,0,0,0.02) 50%,
    rgba(0,0,0,0.01) 70%,
    transparent 100%);
  pointer-events: none;
}
[data-theme="dark"] #site-header::before {
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(249,115,22,0.03) 30%,
    rgba(249,115,22,0.06) 50%,
    rgba(249,115,22,0.03) 70%,
    transparent 100%);
}

/* Thin accent line at the bottom of header */
#site-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(249,115,22,0.08) 15%,
    rgba(249,115,22,0.20) 50%,
    rgba(249,115,22,0.08) 85%,
    transparent 100%);
}
[data-theme="dark"] #site-header::after {
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(249,115,22,0.15) 15%,
    rgba(249,115,22,0.5) 50%,
    rgba(249,115,22,0.15) 85%,
    transparent 100%);
}

/* Flexbox layout — logo on left, nav + actions grouped on right */
#site-header .container { height: 100%; }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}

/* ── Logo (left column) ── */
.site-logo {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--color-text);
  flex-shrink: 0;
  justify-self: start;
  transition: transform var(--dur-fast);
}
.site-logo:hover { transform: scale(1.03); }
[data-theme="dark"] #site-header .site-logo { color: #e8edf5; }

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 11px;
  min-width: 56px;
  background: linear-gradient(135deg, #fb923c 0%, #ea580c 100%);
  border-radius: 10px;
  font-size: 0.82rem;
  font-weight: 900;
  color: #fff;
  flex-shrink: 0;
  letter-spacing: -0.03em;
  text-shadow: 0 1px 3px rgba(0,0,0,0.25);
  box-shadow: 0 2px 8px rgba(249,115,22,0.3), inset 0 1px 0 rgba(255,255,255,0.18);
  transition: box-shadow var(--dur-base);
}
[data-theme="dark"] .logo-badge {
  box-shadow: 0 0 12px rgba(249,115,22,0.45), 0 0 4px rgba(249,115,22,0.3), inset 0 1px 0 rgba(255,255,255,0.2);
  animation: logo-glow 3s ease-in-out infinite;
}

@keyframes logo-glow {
  0%, 100% { box-shadow: 0 0 12px rgba(249,115,22,0.45), 0 0 4px rgba(249,115,22,0.3), inset 0 1px 0 rgba(255,255,255,0.2); }
  50%      { box-shadow: 0 0 20px rgba(249,115,22,0.6), 0 0 8px rgba(249,115,22,0.4), inset 0 1px 0 rgba(255,255,255,0.2); }
}

/* Footer logo — no glow animation */
#site-footer .logo-badge { animation: none; }

.logo-text { color: var(--color-text); line-height: 1; }
.logo-text .accent { color: var(--color-accent); }
[data-theme="dark"] #site-header .logo-text { color: #e8edf5; }
[data-theme="dark"] #site-header .logo-text .accent { color: #f97316; text-shadow: 0 0 8px rgba(249,115,22,0.3); }

/* ── Nav (grouped on the right) ── */
.site-nav {
  display: flex;
  align-items: center;
  margin-left: auto; /* Push to right, grouping with actions */
  margin-right: 12px; /* Space between nav and buttons */
  gap: 4px;
}

.site-nav a {
  position: relative;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--dur-base), background var(--dur-base);
  overflow: hidden;
}
[data-theme="dark"] .site-nav a { color: rgba(232,237,245,0.55); }

/* Hover sweep highlight */
.site-nav a::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(249,115,22,0.04), transparent);
  opacity: 0;
  transition: opacity var(--dur-base);
}
[data-theme="dark"] .site-nav a::before {
  background: linear-gradient(90deg, transparent, rgba(249,115,22,0.06), transparent);
}
.site-nav a:hover::before { opacity: 1; }

.site-nav a:hover { color: var(--color-text); }
[data-theme="dark"] .site-nav a:hover { color: #e8edf5; }

/* Active nav link */
.site-nav a.active {
  color: var(--color-accent);
  font-weight: 600;
  background: var(--color-accent-light);
}
[data-theme="dark"] .site-nav a.active {
  color: #f97316;
  background: transparent;
}
.site-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
[data-theme="dark"] .site-nav a.active::after {
  box-shadow: 0 0 8px rgba(249,115,22,0.6), 0 0 16px rgba(249,115,22,0.3);
}

/* Inactive link animated underline on hover */
.site-nav a:not(.active)::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: rgba(249,115,22,0.4);
  border-radius: 2px;
  transition: width var(--dur-base) var(--ease-out), left var(--dur-base) var(--ease-out);
}
[data-theme="dark"] .site-nav a:not(.active)::after {
  background: rgba(249,115,22,0.5);
}
.site-nav a:not(.active):hover::after {
  width: 20px;
  left: calc(50% - 10px);
}

/* ── Header Right (right column) ── */
.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-self: end;
}

/* Dark mode toggle */
#theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 1rem;
  transition: background var(--dur-fast), color var(--dur-fast), border-color var(--dur-fast), box-shadow var(--dur-fast);
  cursor: pointer;
  flex-shrink: 0;
}
#theme-toggle:hover {
  background: var(--color-surface-3);
  color: var(--color-text);
  border-color: var(--color-accent);
  box-shadow: 0 0 8px rgba(249,115,22,0.12);
}
[data-theme="dark"] #theme-toggle {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  color: rgba(232,237,245,0.5);
}
[data-theme="dark"] #theme-toggle:hover {
  background: rgba(255,255,255,0.1);
  color: #e8edf5;
  border-color: rgba(249,115,22,0.25);
  box-shadow: 0 0 12px rgba(249,115,22,0.15);
}

/* Play Now CTA */
.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 22px !important;
  background: linear-gradient(135deg, #f97316, #ea580c) !important;
  color: #fff !important;
  font-weight: 700 !important;
  font-size: 0.85rem !important;
  border-radius: var(--radius-full) !important;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(249,115,22,0.3) !important;
  transition: transform var(--dur-fast), box-shadow var(--dur-fast) !important;
}
.btn-nav-cta:hover {
  transform: translateY(-2px) scale(1.03) !important;
  box-shadow: 0 4px 20px rgba(249,115,22,0.45) !important;
}

/* Shine sweep on CTA */
.btn-nav-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}
.btn-nav-cta:hover::before { left: 120%; }

/* Dark mode: add pulse glow to CTA */
[data-theme="dark"] .btn-nav-cta {
  box-shadow: 0 0 16px rgba(249,115,22,0.4), 0 2px 8px rgba(0,0,0,0.3) !important;
  animation: cta-pulse 2.5s ease-in-out infinite;
}
[data-theme="dark"] .btn-nav-cta:hover {
  box-shadow: 0 0 32px rgba(249,115,22,0.6), 0 4px 12px rgba(0,0,0,0.3) !important;
}

@keyframes cta-pulse {
  0%, 100% { box-shadow: 0 0 16px rgba(249,115,22,0.4), 0 2px 8px rgba(0,0,0,0.3) !important; }
  50%      { box-shadow: 0 0 28px rgba(249,115,22,0.55), 0 2px 8px rgba(0,0,0,0.3) !important; }
}

/* ── Hamburger ── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.hamburger:hover {
  background: var(--color-surface-3);
  border-color: var(--color-accent);
}
[data-theme="dark"] .hamburger {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
}
[data-theme="dark"] .hamburger:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(249,115,22,0.25);
}
.hamburger span {
  width: 18px;
  height: 2px;
  background: var(--color-text-muted);
  border-radius: 2px;
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-fast), background var(--dur-fast);
}
.hamburger:hover span { background: var(--color-accent); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); background: var(--color-accent); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: var(--color-accent); }

/* ── Mobile Nav ── */
.mobile-nav {
  display: none;
  flex-direction: column;
  position: absolute;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 16px var(--container-pad);
  gap: 4px;
  z-index: 99;
  box-shadow: var(--shadow-md);
}
[data-theme="dark"] .mobile-nav {
  background: rgba(12,15,26,0.96);
  backdrop-filter: blur(32px) saturate(180%);
  -webkit-backdrop-filter: blur(32px) saturate(180%);
  border-bottom: 1px solid rgba(249,115,22,0.12);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--dur-fast), background var(--dur-fast);
}
.mobile-nav a:hover  { color: var(--color-text); background: var(--color-surface-2); }
.mobile-nav a.active { color: var(--color-accent); }
[data-theme="dark"] .mobile-nav a { color: rgba(232,237,245,0.6); }
[data-theme="dark"] .mobile-nav a:hover { color: #e8edf5; background: rgba(255,255,255,0.06); }
[data-theme="dark"] .mobile-nav a.active { color: #f97316; }

@media (max-width: 768px) {
  .site-nav  { display: none; }
  .hamburger { display: flex; }
  /* Fallback to simple space-between on mobile */
}

/* ─── Footer ──────────────────────────────────────────────────── */
#site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 52px 0 28px;
  margin-top: 72px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand .site-logo { margin-bottom: 14px; font-size: 1rem; }
.footer-brand p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-dim);
  margin-bottom: 14px;
}
.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding: 4px 0;
  transition: color var(--dur-fast);
}
.footer-col a:hover { color: var(--color-accent); }

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p    { font-size: 0.8rem; color: var(--color-text-dim); }
.footer-bottom span { color: var(--color-accent); }

.footer-legal { display: flex; gap: 20px; }
.footer-legal a {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  transition: color var(--dur-fast);
}
.footer-legal a:hover { color: var(--color-text-muted); }

@media (max-width: 768px) {
  .footer-grid   { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ─── Card Component ──────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    transform var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base),
    border-color var(--dur-base);
  text-decoration: none;
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-2);
}

/* Icon-style card (reference design) */
.card-icon-area {
  padding: 20px 20px 12px;
  position: relative;
}
.card-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  flex-shrink: 0;
}
.card-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  padding: 3px 8px;
  background: var(--color-danger);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 800;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.card-badge.badge-new  { background: #2563eb; }
.card-badge.badge-hot  { background: #dc2626; }

.card-body     { padding: 4px 20px 20px; display: flex; flex-direction: column; gap: 5px; flex: 1; }
.card-title    { font-size: 0.95rem; font-weight: 700; color: var(--color-text); }
.card-desc     {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-tags     { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 4px; }
.card-meta     {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  color: var(--color-text-dim);
  margin-top: 6px;
}

/* Tag pill */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.66rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: border-color var(--dur-fast), color var(--dur-fast);
}
.tag:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ─── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1;
  transition:
    transform var(--dur-fast) var(--ease-out),
    background var(--dur-fast),
    box-shadow var(--dur-fast),
    opacity var(--dur-fast);
  cursor: pointer;
  border: none;
  font-family: var(--font-main);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  box-shadow: var(--shadow-accent);
}

.btn-secondary {
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-surface-3); border-color: var(--color-border-2); }

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover { color: var(--color-text); border-color: var(--color-border-2); }

.btn-lg   { padding: 14px 32px; font-size: 1rem; border-radius: var(--radius-lg); }
.btn-sm   { padding: 7px 16px; font-size: 0.8rem; }
.btn-icon { width: 40px; height: 40px; padding: 0; border-radius: var(--radius-md); }

/* ─── Section helpers ─────────────────────────────────────────── */
.section { padding: clamp(48px, 9vw, 88px) 0; }

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}
.section-title {
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  font-weight: 800;
  letter-spacing: -0.025em;
}
.section-title span { color: var(--color-accent); }

/* ─── Ad Slots ────────────────────────────────────────────────── */
.ad-slot { width: 100%; overflow: hidden; }
.ad-slot:not(:empty) { margin: 20px 0; }
.ad-slot-rect { max-width: 336px; margin: 0 auto; }

/* ─── Scroll-to-top ───────────────────────────────────────────── */
#scroll-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 42px;
  height: 42px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-accent);
  z-index: 50;
  transition: transform var(--dur-fast), background var(--dur-fast);
  font-size: 1.1rem;
}
#scroll-top.visible { display: flex; }
#scroll-top:hover   { transform: translateY(-2px); background: var(--color-accent-dark); }

/* ─── Toast ───────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 84px;
  right: 28px;
  padding: 12px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--color-text);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  transform: translateY(16px);
  opacity: 0;
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base);
  pointer-events: none;
}
.toast.show { transform: translateY(0); opacity: 1; }

/* ─── Skeleton ────────────────────────────────────────────────── */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}
.skeleton {
  background: linear-gradient(90deg,
    var(--color-surface) 25%,
    var(--color-surface-2) 50%,
    var(--color-surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* ─── Utilities ───────────────────────────────────────────────── */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}
.text-accent  { color: var(--color-accent); }
.text-muted   { color: var(--color-text-muted); }
.text-center  { text-align: center; }
.w-full       { width: 100%; }