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

:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-hover: #334155;
  --border: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.25);
  --success: #34d399;
  --success-glow: rgba(52, 211, 153, 0.25);
  --danger: #f87171;
  --danger-glow: rgba(248, 113, 113, 0.25);
  --warn: #fbbf24;
  --accent-hover: #7dd3fc;
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Light Mode ===== */
[data-theme="light"] {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --accent: #0284c7;
  --accent-glow: rgba(2, 132, 199, 0.2);
  --accent-hover: #38bdf8;
  --success: #059669;
  --success-glow: rgba(5, 150, 105, 0.2);
  --danger: #dc2626;
  --danger-glow: rgba(220, 38, 38, 0.2);
  --warn: #d97706;
}

html, body { 
  height: 100%; 
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

/* ===== Layout ===== */
.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.side-rail {
  display: none;
}

/* ===== Header ===== */
.header {
  text-align: center;
  padding: 28px 0 20px;
  position: relative;
}
.theme-toggle {
  position: absolute;
  top: 28px;
  right: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
}
.theme-toggle input {
  display: none;
}
.toggle-track {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 64px;
  height: 32px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 999px;
  padding: 0 6px;
  transition: all var(--transition);
  box-sizing: border-box;
}
.toggle-icon {
  font-size: 0.9rem;
  line-height: 1;
  z-index: 1;
  transition: opacity 0.25s ease;
}
.toggle-sun { opacity: 1; }
.toggle-moon { opacity: 0.35; }
.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 4px;
  width: 22px;
  height: 22px;
  background: var(--accent);
  border-radius: 50%;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}
/* Dark mode: thumb slides right, moon brightens */
.theme-toggle input:checked ~ .toggle-track .toggle-thumb {
  transform: translateX(30px);
}
.theme-toggle input:checked ~ .toggle-track .toggle-sun {
  opacity: 0.35;
}
.theme-toggle input:checked ~ .toggle-track .toggle-moon {
  opacity: 1;
}
.theme-toggle:hover .toggle-track {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}
.header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.header .subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== Progress Bar ===== */
.progress-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}
.progress-bar {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: 3px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.progress-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 70px;
  text-align: right;
}

/* ===== Card ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  animation: cardIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.card.correct { 
  border-color: var(--success); 
  box-shadow: 0 0 32px var(--success-glow);
}
.card.wrong { 
  border-color: var(--danger); 
  box-shadow: 0 0 32px var(--danger-glow);
  animation: shake 0.5s ease;
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(24px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(5px); }
}

/* ===== Question ===== */
.question-number {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 10px;
}
.question-text {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.55;
  margin-bottom: 24px;
  color: var(--text);
}

/* ===== Sign Image ===== */
.sign-image-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}
.sign-image {
  max-width: 140px;
  max-height: 140px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  background: var(--surface);
  padding: 8px;
  object-fit: contain;
}

/* ===== Options ===== */
.options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: transparent;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.45;
  position: relative;
}
.option:hover {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.06);
  transform: translateX(4px);
}
.option:active { transform: scale(0.985); }

.option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--border);
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
  transition: all var(--transition);
}
.option:hover .option-letter {
  background: var(--accent);
  color: var(--bg);
}

.option.correct-choice {
  border-color: var(--success);
  background: rgba(52, 211, 153, 0.1);
  animation: pulse 0.6s ease;
}
.option.correct-choice .option-letter {
  background: var(--success);
  color: var(--bg);
}
.option.wrong-choice {
  border-color: var(--danger);
  background: rgba(248, 113, 113, 0.1);
}
.option.wrong-choice .option-letter {
  background: var(--danger);
  color: #fff;
}
.option.selected {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.1);
}
.option.selected .option-letter {
  background: var(--accent);
  color: var(--bg);
}
.option.disabled {
  pointer-events: none;
  opacity: 0.55;
}
.option.disabled.correct-choice,
.option.disabled.wrong-choice {
  opacity: 1;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

/* ===== Feedback Strip ===== */
.feedback {
  margin-top: 20px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  display: none;
  animation: cardIn 0.3s ease;
}
.feedback.show { display: block; }
.feedback.correct-fb { 
  background: rgba(52, 211, 153, 0.12); 
  color: var(--success);
  border: 1px solid rgba(52, 211, 153, 0.25);
}
.feedback.wrong-fb { 
  background: rgba(248, 113, 113, 0.12); 
  color: var(--danger);
  border: 1px solid rgba(248, 113, 113, 0.25);
}

/* ===== Next Button ===== */
.btn-next {
  display: none;
  margin-top: 18px;
  padding: 12px 32px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  align-self: flex-start;
}
.btn-next:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.btn-next.show { display: inline-flex; align-items: center; gap: 6px; }

/* ===== Summary Overlay ===== */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.3s ease;
}
.overlay.hidden { display: none; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.summary-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  max-width: 480px;
  width: 90%;
  text-align: center;
  animation: cardIn 0.4s ease;
}
.summary-card h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}
.summary-card .emoji { font-size: 3rem; margin-bottom: 12px; }
.summary-stat {
  font-size: 1.1rem;
  margin: 6px 0;
  color: var(--text-muted);
}
.summary-stat strong { color: var(--text); }
.summary-bar-wrap {
  height: 12px;
  background: var(--border);
  border-radius: 6px;
  margin: 20px 0;
  overflow: hidden;
}
.summary-bar-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 0.8s ease;
}

.btn-restart {
  margin-top: 16px;
  padding: 12px 40px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-restart:hover { background: var(--accent-hover); transform: translateY(-2px); }

/* ===== Streak Counter ===== */
.streak-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(56, 189, 248, 0.12);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-left: 8px;
  transition: all var(--transition);
}
.streak-badge.hot { 
  background: rgba(251, 191, 36, 0.2); 
  color: var(--warn);
}

/* ===== Ad Containers ===== */
.ad-unit {
  margin-bottom: 20px;
}

.ad-unit-label {
  margin-bottom: 8px;
  text-align: center;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}

.ad-unit-modal {
  margin-bottom: 20px;
}

.ad-slot {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 90px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  overflow: hidden;
  position: relative;
}
.ad-slot::before {
  content: 'Ad';
  position: absolute;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  opacity: 0;
  transition: opacity 0.3s;
}
.ad-slot:empty::before { opacity: 0.5; }
.ad-slot ins { display: block; }
.ad-top { min-height: 90px; max-height: 100px; margin-bottom: 0; }
.ad-incontent { min-height: 250px; max-height: 280px; margin-top: 20px; }
.ad-bottom { min-height: 90px; max-height: 100px; margin-top: 20px; margin-bottom: 0; }

.ad-banner-placeholder {
  min-height: 110px;
  padding: 18px;
  border-style: solid;
  background:
    linear-gradient(180deg, rgba(56, 189, 248, 0.06), rgba(56, 189, 248, 0.02)),
    var(--surface);
  flex-direction: column;
  gap: 6px;
}

.ad-banner-placeholder::before {
  content: none;
}

.ad-placeholder-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight: 700;
}

.ad-placeholder-copy {
  color: var(--text-muted);
  font-size: 0.88rem;
  text-align: center;
}

.ad-side-placeholder {
  min-height: 600px;
  width: 160px;
  padding: 22px 14px;
  border-color: rgba(56, 189, 248, 0.22);
  box-shadow: 0 18px 40px rgba(2, 6, 23, 0.18);
}

/* ===== Welcome / Start Modal ===== */
.welcome-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  animation: fadeIn 0.3s ease;
  padding: 20px;
}
.welcome-overlay.hidden { display: none; }

.welcome-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px 28px;
  max-width: 440px;
  width: 100%;
  text-align: center;
  animation: cardIn 0.4s ease;
  position: relative;
}
.welcome-card .welcome-emoji {
  font-size: 3.5rem;
  margin-bottom: 10px;
  display: block;
}
.welcome-card h2 {
  font-size: 1.4rem;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.welcome-card .welcome-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.5;
}
.welcome-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 16px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.welcome-stats span {
  display: flex;
  align-items: center;
  gap: 5px;
}
.welcome-stats strong { color: var(--text); }

/* Category Tabs */
.category-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 18px 0 10px;
}
.cat-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 14px 10px 12px;
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.25s;
  font-family: inherit;
  color: var(--text-muted);
  text-align: center;
  position: relative;
}
.cat-tab:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: translateY(-1px);
}
.cat-tab.active {
  border-color: var(--accent);
  background: rgba(59,130,246,0.08);
  color: var(--text);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.cat-tab-icon {
  font-size: 1.4rem;
  line-height: 1;
}
.cat-tab-label {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--text);
}
.cat-tab-count {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.cat-tab-badge {
  display: inline-block;
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--surface-hover);
  color: var(--accent);
  font-weight: 600;
  margin-top: 2px;
}
.cat-tab.active .cat-tab-badge {
  background: rgba(59,130,246,0.15);
  color: var(--accent);
}

.welcome-ad {
  margin: 0 -8px 0;
  min-height: 100px;
  background: rgba(51, 65, 85, 0.5);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.welcome-ad::after {
  content: 'Ad';
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  opacity: 0.5;
}
.welcome-ad ins { display: block; width: 100%; }

/* Resume banner in welcome modal */
.resume-banner {
  background: var(--surface-hover);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 18px 0 0;
  text-align: center;
}
.resume-text {
  margin: 0 0 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.btn-resume {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 32px;
  background: var(--success);
  color: var(--bg);
  border: none;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-resume:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--success-glow);
}

.btn-start {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 44px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  transition: all var(--transition);
  margin-top: 4px;
}
.btn-start:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-glow);
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
  .app { padding: 12px 12px 30px; }
  .card { padding: 22px 16px; }
  .question-text { font-size: 1rem; }
  .option { padding: 12px 14px; font-size: 0.9rem; }
  .theme-toggle { top: 24px; }
  .toggle-track { width: 56px; height: 28px; }
  .toggle-thumb { width: 18px; height: 18px; top: 3px; left: 3px; }
  .theme-toggle input:checked ~ .toggle-track .toggle-thumb { transform: translateX(28px); }
}

@media (min-width: 1180px) {
  .side-rail {
    position: fixed;
    top: 108px;
    display: flex;
    z-index: 10;
  }

  .side-rail-left {
    left: max(8px, calc(50% - 560px));
  }

  .side-rail-right {
    right: max(8px, calc(50% - 560px));
  }
}

/* ===== SEO Content — visually hidden, crawlable ===== */
.seo-content {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}
.seo-content h2 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}
.seo-content .seo-qa {
  margin-bottom: 10px;
}
.seo-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
}
.seo-content p {
  font-size: 0.9rem;
  margin-bottom: 8px;
}

/* ===== Site Footer ===== */
.site-footer {
  text-align: center;
  padding: 16px 0 24px;
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.6;
}
.donate-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s;
}
.donate-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* ===== Affiliate Resources Section ===== */
.affiliate-section {
  margin-top: 24px;
  padding: 24px 0 8px;
  border-top: 1px solid var(--border);
}
.section-heading {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  text-align: center;
}
.affiliate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}
.affiliate-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 18px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition);
  text-align: center;
}
.affiliate-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.aff-card-icon {
  font-size: 2rem;
  line-height: 1;
}
.aff-card-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
}
.aff-card-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}
.affiliate-disclosure {
  text-align: center;
  font-size: 0.65rem;
  color: var(--text-muted);
  opacity: 0.6;
  margin-top: 4px;
}

/* ===== Extra Network Ad Container (for Media.net/Carbon alongside AdSense) ===== */
.extra-ad {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 90px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  margin: 20px 0;
  overflow: hidden;
}

/* ===== Summary Actions ===== */
.summary-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 16px;
  flex-wrap: wrap;
}
.summary-actions .btn-restart {
  margin-top: 0;
}

/* ===== Review Mistakes Mode ===== */
.review-header {
  text-align: center;
  margin-bottom: 16px;
}
.review-emoji {
  font-size: 2.2rem;
  display: block;
  margin-bottom: 6px;
}
.review-progress {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.review-question-wrap {
  margin-bottom: 16px;
}
.review-question {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 18px;
  line-height: 1.5;
}
.review-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.review-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  background: var(--surface);
  transition: none;
}
.review-option .option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--border);
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}
.review-option.review-correct {
  border-color: var(--success);
  background: rgba(52, 211, 153, 0.08);
}
.review-option.review-correct .option-letter {
  background: var(--success);
  color: #fff;
}
[data-theme="light"] .review-option.review-correct {
  background: rgba(5, 150, 105, 0.06);
}
.review-actions {
  gap: 8px;
}
.review-actions .btn-restart:disabled {
  opacity: 0.35;
  cursor: default;
  transform: none;
  box-shadow: none;
}

/* ===== Review Mistakes Button ===== */
.btn-review {
  padding: 12px 32px;
  background: var(--warn);
  color: var(--bg);
  border: none;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-review:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(251, 191, 36, 0.3);
}

/* ===== Share Button ===== */
.btn-share {
  padding: 12px 32px;
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-share:hover {
  background: var(--accent);
  color: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

/* ===== Toast Notification ===== */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--success);
  border-radius: 999px;
  padding: 12px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 300;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  white-space: nowrap;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}