/* ═══════════════════════════════════════════════
   Archive YouTube Backlink — Light/Dark Theme
   ═══════════════════════════════════════════════ */

/* ── LIGHT THEME (default) ── */
:root {
  --bg: #f5f7fa;
  --bg-subtle: #ffffff;
  --surface: #ffffff;
  --card: rgba(255, 255, 255, 0.85);
  --card-hover: rgba(255, 255, 255, 0.95);
  --card-border: rgba(0, 0, 0, 0.06);
  --card-border-hover: rgba(59, 130, 246, 0.2);
  --glass-blur: 20px;

  --ink: #1e293b;
  --ink-bright: #0f172a;
  --ink-muted: #475569;
  --ink-dim: #94a3b8;

  --primary: #3b82f6;
  --primary-light: #2563eb;
  --accent: #0891b2;
  --purple: #7c3aed;
  --gradient: linear-gradient(135deg, #3b82f6, #0891b2, #7c3aed);
  --gradient-hover: linear-gradient(135deg, #60a5fa, #06b6d4, #a78bfa);
  --gradient-text: linear-gradient(135deg, #2563eb, #0891b2);

  --ok: #16a34a;
  --bad: #dc2626;
  --warn: #d97706;

  --border: rgba(0, 0, 0, 0.08);
  --ring: rgba(59, 130, 246, 0.25);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.08);

  --particle-opacity: 0.04;

  --radius: 20px;
  --radius-sm: 14px;
  --radius-xs: 10px;

  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Outfit', 'Inter', system-ui, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── DARK THEME ── */
body.dark {
  --bg: #06080f;
  --bg-subtle: #0c1120;
  --surface: #111827;
  --card: rgba(17, 24, 39, 0.7);
  --card-hover: rgba(22, 31, 52, 0.85);
  --card-border: rgba(99, 140, 255, 0.1);
  --card-border-hover: rgba(99, 140, 255, 0.25);

  --ink: #e2e8f0;
  --ink-bright: #f8fafc;
  --ink-muted: #94a3b8;
  --ink-dim: #64748b;

  --primary: #3b82f6;
  --primary-light: #60a5fa;
  --accent: #06b6d4;
  --purple: #8b5cf6;
  --gradient: linear-gradient(135deg, #3b82f6, #06b6d4, #8b5cf6);
  --gradient-hover: linear-gradient(135deg, #60a5fa, #22d3ee, #a78bfa);
  --gradient-text: linear-gradient(135deg, #60a5fa, #22d3ee);

  --ok: #22c55e;
  --bad: #ef4444;
  --warn: #f59e0b;

  --border: rgba(148, 163, 184, 0.08);
  --ring: rgba(59, 130, 246, 0.35);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 60px rgba(59, 130, 246, 0.12);

  --particle-opacity: 0.08;
}

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

::selection {
  background: rgba(59, 130, 246, 0.2);
  color: var(--ink-bright);
}

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

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

/* ── Floating Particles ── */
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  opacity: var(--particle-opacity);
  animation: floatParticle 20s infinite ease-in-out;
}

.p1 { width: 500px; height: 500px; background: var(--primary); top: -10%; left: -5%; animation-delay: 0s; }
.p2 { width: 400px; height: 400px; background: var(--accent); top: 30%; right: -8%; animation-delay: -5s; }
.p3 { width: 350px; height: 350px; background: var(--purple); bottom: 10%; left: 20%; animation-delay: -10s; }
.p4 { width: 250px; height: 250px; background: var(--primary-light); top: 60%; left: -5%; animation-delay: -15s; }
.p5 { width: 300px; height: 300px; background: var(--accent); top: -5%; right: 30%; animation-delay: -7s; }

@keyframes floatParticle {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -40px) scale(1.05); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(15px, 30px) scale(1.02); }
}

/* ── Layout ── */
.wrap {
  position: relative;
  z-index: 1;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ═══════════════════════════════════════
   NAVBAR
   ═══════════════════════════════════════ */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(245, 247, 250, 0.8);
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
  transition: background 0.4s ease;
}

body.dark .navbar {
  background: rgba(6, 8, 15, 0.8);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 1.1rem;
}

.nav-logo {
  font-size: 1.4rem;
}

.nav-title {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.nav-subtitle {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--ink-dim);
  -webkit-text-fill-color: var(--ink-dim);
}

.nav-subtitle a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
}

.nav-subtitle a:hover {
  text-decoration: underline;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-links a {
  color: var(--ink-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 6px 14px;
  border-radius: 999px;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--ink-bright);
  background: rgba(0, 0, 0, 0.04);
}

body.dark .nav-links a:hover {
  background: rgba(255, 255, 255, 0.06);
}

/* ── Language Toggle & Theme Switch ── */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  cursor: pointer;
  font-family: var(--font);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--ink);
  transition: var(--transition);
}

.lang-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

body.dark .lang-toggle {
  background: #1e293b;
  border-color: rgba(148, 163, 184, 0.15);
}

/* Hide Google Translate Top Bar & Tooltips */
.goog-te-banner-frame.skiptranslate, .goog-te-gadget-icon, #goog-gt-tt, .goog-tooltip { display: none !important; }
body { top: 0px !important; }
.goog-text-highlight { background-color: transparent !important; border: none !important; box-shadow: none !important; }

/* ── Theme Switch (pill toggle) ── */
.theme-switch {
  position: relative;
  display: flex;
  align-items: center;
  width: 64px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #e8ecf2;
  cursor: pointer;
  margin-left: 10px;
  padding: 0;
  transition: var(--transition);
  overflow: hidden;
}

body.dark .theme-switch {
  background: #1e293b;
  border-color: rgba(148, 163, 184, 0.15);
}

.theme-switch:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--ring);
}

.switch-icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.85rem;
  z-index: 1;
  transition: opacity 0.3s ease;
  line-height: 1;
}

.switch-sun {
  left: 6px;
  opacity: 1;
}

.switch-moon {
  right: 6px;
  opacity: 0.4;
}

body.dark .switch-sun {
  opacity: 0.4;
}

body.dark .switch-moon {
  opacity: 1;
}

.switch-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2;
}

body.dark .switch-thumb {
  transform: translateX(32px);
  background: #334155;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}

/* ═══════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════ */
.hero {
  position: relative;
  text-align: center;
  padding: 60px 20px 40px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.05), transparent 70%);
  pointer-events: none;
  animation: pulseGlow 4s ease-in-out infinite alternate;
}

body.dark .hero-glow {
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.08), transparent 70%);
}

@keyframes pulseGlow {
  0% { opacity: 0.7; transform: translateX(-50%) scale(1); }
  100% { opacity: 1; transform: translateX(-50%) scale(1.1); }
}

.hero-content {
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-line1 {
  display: block;
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--ink-bright);
}

.hero-line2 {
  display: block;
  font-size: clamp(2rem, 5vw, 3.5rem);
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-line3 {
  display: block;
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--ink-bright);
}

.hero-subtitle {
  font-size: clamp(0.95rem, 1.8vw, 1.15rem);
  color: var(--ink-muted);
  max-width: 640px;
  margin: 0 auto 28px;
  line-height: 1.65;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-subtitle strong {
  color: var(--ink-bright);
}

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.3s both;
}

/* ── Stats Bar ── */
.stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 48px;
  padding: 20px 28px;
  background: var(--card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  animation: fadeInUp 0.6s ease 0.4s both;
}

.stat-item {
  flex: 1;
  text-align: center;
  padding: 4px 16px;
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-dim);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
  flex-shrink: 0;
}

/* ═══════════════════════════════════════
   FEATURES GRID
   ═══════════════════════════════════════ */
.features-section {
  padding: 60px 0 40px;
}

.section-title {
  text-align: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 8px;
  color: var(--ink-bright);
}

.section-desc {
  text-align: center;
  color: var(--ink-dim);
  font-size: 1rem;
  margin-bottom: 36px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  background: var(--card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px 22px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.04), transparent 60%);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--card-border-hover);
  box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 14px;
  display: inline-block;
}

.feature-card h3 {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--ink-bright);
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--ink-muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

/* ═══════════════════════════════════════
   HOW IT WORKS
   ═══════════════════════════════════════ */
.how-section {
  padding: 40px 0 60px;
}

.steps-container {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 680px;
  margin: 0 auto;
}

.step-connector {
  position: absolute;
  left: 28px;
  top: 28px;
  bottom: 28px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--accent), var(--purple));
  border-radius: 2px;
  opacity: 0.25;
}

.step-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}

.step-card:hover {
  transform: translateX(6px);
  border-color: var(--card-border-hover);
  box-shadow: var(--shadow-lg);
}

.step-number {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.2rem;
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.25);
}

.step-body h3 {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--ink-bright);
  margin-bottom: 4px;
}

.step-body p {
  color: var(--ink-muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

/* ═══════════════════════════════════════
   MAIN TOOL CARD
   ═══════════════════════════════════════ */
.card.glass {
  background: var(--card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 0;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.tool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.tool-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.3rem;
  color: var(--ink-bright);
}

.tool-badge {
  padding: 4px 14px;
  background: rgba(22, 163, 74, 0.08);
  border: 1px solid rgba(22, 163, 74, 0.15);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ok);
}

/* ── Toolbar ── */
.toolbar {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px;
}

#videoInput {
  width: 100%;
  padding: 13px 16px;
  font-size: 15px;
  font-family: var(--font);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--bg-subtle);
  color: var(--ink);
  transition: var(--transition);
}

#videoInput::placeholder {
  color: var(--ink-dim);
}

#videoInput:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--ring);
}

/* ── Buttons ── */
.btn {
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius-xs);
  cursor: pointer;
  font-family: var(--font);
  font-weight: 800;
  font-size: 0.9rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  text-decoration: none;
}

.btn:active {
  transform: translateY(1px) scale(0.98);
}

.btn:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

.btn-primary {
  color: #fff;
  background: var(--gradient);
  background-size: 200% 200%;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.2);
}

.btn-primary:hover {
  background-position: 100% 0;
  box-shadow: 0 8px 32px rgba(59, 130, 246, 0.3);
  transform: translateY(-1px);
}

.btn-glow {
  color: #fff;
  background: var(--gradient);
  background-size: 200% 200%;
  padding: 14px 28px;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 6px 30px rgba(59, 130, 246, 0.2);
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.btn-glow:hover {
  box-shadow: 0 8px 40px rgba(59, 130, 246, 0.35);
  transform: translateY(-2px);
}

.btn-outline {
  color: var(--ink-muted);
  background: transparent;
  border: 1px solid var(--border);
  padding: 14px 28px;
  font-size: 1rem;
  border-radius: var(--radius-sm);
}

.btn-outline:hover {
  color: var(--ink-bright);
  border-color: var(--card-border-hover);
  background: var(--card);
}

.btn-dark {
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--border);
}

.btn-dark:hover {
  border-color: var(--card-border-hover);
  box-shadow: var(--shadow);
}

.btn-icon {
  font-size: 0.85rem;
}

/* ── Advanced Panel ── */
.advanced-panel {
  display: none;
  margin-top: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.advanced-grid {
  display: grid;
  gap: 10px;
}

.advanced-grid > label {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 10px;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 10px 14px;
  color: var(--ink);
}

.label-text {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--ink-muted);
}

select {
  padding: 8px 12px;
  font-family: var(--font);
  font-size: 0.88rem;
  background: var(--bg-subtle);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: var(--transition);
}

select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--ring);
}

select:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.range-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

#concurrencyRange {
  flex: 1;
  accent-color: var(--primary);
  height: 6px;
}

.inline-num {
  font-weight: 900;
  color: var(--primary);
  font-size: 1.05rem;
  min-width: 20px;
  text-align: center;
}

/* Targets & Options */
.targets-group,
.options-group {
  margin-top: 10px;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
}

.targets-group > .label-text {
  display: block;
  margin-bottom: 8px;
}

.checkbox-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.check-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--ink);
  transition: var(--transition);
}

.check-label:hover {
  color: var(--ink-bright);
}

.check-label input[type="checkbox"] {
  accent-color: var(--primary);
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.options-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ── Share ── */
.share {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-top: 14px;
}

#shareUrl {
  width: 100%;
  padding: 12px 16px;
  background: rgba(59, 130, 246, 0.04);
  color: var(--ink);
  border: 1px dashed rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-xs);
  font-family: var(--font);
  font-size: 0.9rem;
}

#shareUrl:focus {
  outline: none;
  border-color: var(--primary);
}

/* ── Progress ── */
.progress {
  margin: 16px 0 12px;
}

.bar-wrap {
  background: var(--bg);
  height: 24px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}

#progressBar {
  height: 100%;
  width: 0%;
  background: var(--gradient);
  background-size: 200% 200%;
  animation: shimmer 3s ease infinite;
  border-radius: 12px;
  transition: width 0.4s ease;
}

#progressText {
  margin-top: 6px;
  font-size: 0.88rem;
  color: var(--ink-dim);
  font-weight: 600;
}

/* ── IFrame Grid ── */
#iframeGrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.slot {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.slot:hover {
  border-color: var(--card-border-hover);
}

.slot header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg);
  color: var(--ink);
  border-bottom: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 0;
  box-shadow: none;
}

.slot .tag {
  font-size: 0.8rem;
  color: var(--ink-muted);
  font-weight: 700;
}

.slot iframe {
  width: 100%;
  height: 260px;
  border: 0;
  display: block;
  background: var(--bg-subtle);
}

/* ── Results List ── */
#results {
  list-style: none;
  padding: 0;
  margin: 14px 0 0;
}

#results li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 8px;
  transition: var(--transition);
}

#results li:hover {
  border-color: var(--card-border-hover);
}

#results a {
  color: var(--ink);
  text-decoration: none;
  word-break: break-all;
  font-size: 0.88rem;
  transition: var(--transition);
}

#results a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.status {
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 0.8rem;
  white-space: nowrap;
}

.loading {
  background: rgba(217, 119, 6, 0.08);
  color: var(--warn);
  border: 1px solid rgba(217, 119, 6, 0.15);
}

.success {
  background: rgba(22, 163, 74, 0.08);
  color: var(--ok);
  border: 1px solid rgba(22, 163, 74, 0.15);
}

.failure {
  background: rgba(220, 38, 38, 0.08);
  color: var(--bad);
  border: 1px solid rgba(220, 38, 38, 0.15);
}

/* ── Actions ── */
.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

/* ── Hint ── */
.hint {
  color: var(--ink-dim);
  font-size: 0.85rem;
  margin-top: 8px;
  line-height: 1.5;
}

.hint strong {
  color: var(--ink-muted);
}

/* ═══════════════════════════════════════
   TESTIMONIALS
   ═══════════════════════════════════════ */
.testimonials-section {
  padding: 40px 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.testimonial-card {
  background: var(--card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px 22px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--card-border-hover);
  box-shadow: var(--shadow-lg);
}

.testimonial-stars {
  color: #f59e0b;
  font-size: 0.9rem;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.testimonial-text {
  color: var(--ink-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  flex: 1;
  margin-bottom: 16px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: auto;
}

.author-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  font-weight: 800;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  letter-spacing: 0.5px;
}

.author-name {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--ink-bright);
}

.author-role {
  font-size: 0.78rem;
  color: var(--ink-dim);
  margin-top: 1px;
}

/* ═══════════════════════════════════════
   FAQ
   ═══════════════════════════════════════ */
.faq-section {
  padding: 40px 0 60px;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0;
  box-shadow: var(--shadow);
  transition: var(--transition);
  overflow: hidden;
}

.faq-item:hover {
  border-color: var(--card-border-hover);
}

.faq-item summary {
  padding: 16px 20px;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--ink-bright);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: var(--transition);
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--ink-dim);
  flex-shrink: 0;
  transition: var(--transition);
}

.faq-item[open] summary::after {
  content: '−';
  color: var(--primary);
}

.faq-item summary:hover {
  color: var(--primary);
}

.faq-item > p {
  padding: 0 20px 16px;
  color: var(--ink-muted);
  font-size: 0.88rem;
  line-height: 1.6;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ═══════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════ */
.site-footer {
  padding: 40px 0 32px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 600px;
  margin: 0 auto;
}

/* Footer logo */
.footer-logo {
  margin-bottom: 14px;
}

.footer-logo a {
  display: inline-block;
}

.footer-logo img {
  height: 40px;
  width: auto;
  object-fit: contain;
  transition: opacity 0.3s ease;
}

.footer-logo .logo-light { display: inline-block; }
.footer-logo .logo-dark { display: none; }

body.dark .footer-logo .logo-light { display: none; }
body.dark .footer-logo .logo-dark { display: inline-block; }

.footer-desc {
  color: var(--ink-dim);
  font-size: 0.88rem;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.footer-links a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--ink-bright);
  background: rgba(0, 0, 0, 0.04);
}

body.dark .footer-links a:hover {
  background: rgba(255, 255, 255, 0.06);
}

.footer-copy {
  color: var(--ink-dim);
  font-size: 0.78rem;
  opacity: 0.7;
}

/* ── Toast ── */
.toast {
  position: fixed;
  left: 50%;
  top: 24px;
  transform: translateX(-50%) translateY(-12px);
  background: #fef3c7;
  color: #92400e;
  padding: 12px 24px;
  border-radius: 999px;
  border: 1px solid #fbbf24;
  box-shadow: 0 8px 32px rgba(217, 119, 6, 0.2);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 9999;
  font-weight: 700;
  font-size: 0.9rem;
}

body.dark .toast {
  background: rgba(254, 243, 199, 0.95);
  color: #78350f;
  border-color: #f59e0b;
  box-shadow: 0 8px 32px rgba(245, 158, 11, 0.25);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ═══════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.features-section,
.how-section,
.faq-section,
#tool {
  animation: fadeInUp 0.7s ease both;
}

/* ═══════════════════════════════════════
   RESPONSIVE — Tablet (≤ 768px)
   ═══════════════════════════════════════ */
@media (max-width: 768px) {
  .wrap { padding: 0 14px; }
  .navbar { padding: 12px 0; }
  .nav-links { gap: 2px; }
  .nav-links a { font-size: 0.8rem; padding: 5px 10px; }
  .hero { padding: 40px 10px 30px; }
  .hero-line1, .hero-line2, .hero-line3 { font-size: clamp(1.6rem, 5vw, 2.5rem); }

  .stats-bar { flex-wrap: wrap; gap: 4px; padding: 16px 14px; }
  .stat-item { flex: 0 0 48%; padding: 8px 4px; }
  .stat-divider { display: none; }
  .features-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .toolbar { grid-template-columns: 1fr; }
  .share { grid-template-columns: 1fr; }
  .advanced-grid > label { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
  .slot iframe { height: 200px; }
  #iframeGrid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════
   RESPONSIVE — Phone (≤ 480px)
   ═══════════════════════════════════════ */
@media (max-width: 480px) {
  .nav-links { display: none; }
  .hero { padding: 32px 6px 24px; }
  .hero-pill { font-size: 0.75rem; padding: 6px 14px; }
  .hero-line1, .hero-line2, .hero-line3 { font-size: 1.6rem; }
  .hero-subtitle { font-size: 0.88rem; }
  .hero-cta .btn { width: 100%; justify-content: center; }

  .stats-bar { padding: 12px 10px; }
  .stat-item { flex: 0 0 48%; }
  .stat-number { font-size: 1.2rem; }
  .stat-label { font-size: 0.7rem; }
  .features-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 20px 18px; }
  .card.glass { padding: 14px; }
  .btn { padding: 10px 16px; font-size: 0.85rem; }
  .checkbox-row { flex-direction: column; gap: 10px; }
  .options-group { flex-direction: column; gap: 10px; }
  #results li { grid-template-columns: 1fr; gap: 6px; }
  .status { justify-self: start; }
  .step-card { padding: 16px; gap: 14px; }
  .tool-header { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* ── Custom Scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(0, 0, 0, 0.12); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0, 0, 0, 0.2); }

body.dark ::-webkit-scrollbar-thumb { background: rgba(148, 163, 184, 0.15); }
body.dark ::-webkit-scrollbar-thumb:hover { background: rgba(148, 163, 184, 0.3); }