/* ============================================================
   Quiz App BD — Landing Site
   Theme: White · Emerald (#10B981) · Blue (#2563EB)
   Material-3 inspired, premium, responsive, animated.
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  /* Brand */
  --emerald-50:  #ECFDF5;
  --emerald-100: #D1FAE5;
  --emerald-200: #A7F3D0;
  --emerald-300: #6EE7B7;
  --emerald-400: #34D399;
  --emerald-500: #10B981;
  --emerald-600: #059669;
  --emerald-700: #047857;

  --blue-50:  #EFF6FF;
  --blue-100: #DBEAFE;
  --blue-200: #BFDBFE;
  --blue-400: #60A5FA;
  --blue-500: #3B82F6;
  --blue-600: #2563EB;
  --blue-700: #1D4ED8;

  --amber-500: #F59E0B;

  --red-500: #EF4444;
  --red-600: #DC2626;

  --slate-50:  #F8FAFC;
  --slate-100: #F1F5F9;
  --slate-200: #E2E8F0;
  --slate-300: #CBD5E1;
  --slate-400: #94A3B8;
  --slate-500: #64748B;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1E293B;
  --slate-900: #0F172A;

  /* Semantic */
  --bg:        #FFFFFF;
  --bg-alt:    #F8FAFC;
  --bg-card:   #FFFFFF;
  --bg-deep:   #0F172A;
  --text:      #0F172A;
  --text-muted: #475569;
  --text-soft:  #64748B;
  --border:    #E2E8F0;
  --border-strong: #CBD5E1;

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #10B981 0%, #2563EB 100%);
  --grad-soft:    linear-gradient(135deg, #ECFDF5 0%, #EFF6FF 100%);
  --grad-card:    linear-gradient(140deg, #FFFFFF 0%, #F8FAFC 100%);
  --grad-hero-bg: radial-gradient(1200px 600px at 80% -10%, rgba(16,185,129,0.18), transparent 60%),
                  radial-gradient(900px 500px at -5% 30%, rgba(37,99,235,0.18), transparent 60%);

  --shadow-xs: 0 1px 2px rgba(15,23,42,0.04);
  --shadow-sm: 0 2px 8px rgba(15,23,42,0.06);
  --shadow-md: 0 8px 24px rgba(15,23,42,0.08);
  --shadow-lg: 0 20px 48px rgba(15,23,42,0.12);
  --shadow-emerald: 0 10px 30px rgba(16,185,129,0.25);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 999px;

  --container: 1200px;
  --header-h: 72px;

  --easing: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 160ms;
  --t-med:  280ms;
  --t-slow: 520ms;
}

@media (prefers-color-scheme: dark) {
  /* The site intentionally stays light — the brand reads better on
     white. If you ever ship a dark mode, you would re-map semantic
     tokens here. */
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, h5, h6 { margin: 0; line-height: 1.18; letter-spacing: -0.02em; }
p { margin: 0; }

.container {
  width: min(100% - 40px, var(--container));
  margin-inline: auto;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 14.5px;
  letter-spacing: -0.01em;
  transition: transform var(--t-fast) var(--easing),
              box-shadow var(--t-med) var(--easing),
              background var(--t-fast) var(--easing),
              color var(--t-fast) var(--easing);
  white-space: nowrap;
  user-select: none;
  border: 1.5px solid transparent;
}
.btn:focus-visible {
  outline: 3px solid var(--emerald-300);
  outline-offset: 2px;
}
.btn-sm  { padding: 9px 16px; font-size: 13.5px; }
.btn-lg  { padding: 15px 28px; font-size: 16px; }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: var(--shadow-emerald);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 34px rgba(16,185,129,0.35);
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: #fff;
  color: var(--text);
  border-color: var(--border);
  box-shadow: var(--shadow-xs);
}
.btn-ghost:hover {
  border-color: var(--emerald-500);
  color: var(--emerald-700);
  background: var(--emerald-50);
}

.btn-danger {
  background: var(--red-500);
  color: #fff;
  box-shadow: 0 8px 22px rgba(239,68,68,0.30);
}
.btn-danger:hover { background: var(--red-600); transform: translateY(-1px); }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.78);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background var(--t-fast) var(--easing),
              border-color var(--t-fast) var(--easing),
              box-shadow var(--t-med) var(--easing);
}
.site-header.is-scrolled {
  background: rgba(255,255,255,0.92);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.02em;
}
.brand img {
  border-radius: 10px;
  box-shadow: var(--shadow-xs);
}
.brand-text { color: var(--slate-900); }
.brand-accent {
  background: var(--grad-primary);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  gap: 6px;
}
.nav-links a {
  padding: 8px 14px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--slate-700);
  border-radius: var(--radius-full);
  transition: color var(--t-fast), background var(--t-fast);
}
.nav-links a:hover {
  color: var(--emerald-700);
  background: var(--emerald-50);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  align-items: center; justify-content: center;
  flex-direction: column;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--slate-800);
  border-radius: 2px;
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Mobile nav */
@media (max-width: 920px) {
  .nav-links {
    position: absolute;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    gap: 4px;
    padding: 18px 20px 28px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--t-med) var(--easing), opacity var(--t-med) var(--easing);
  }
  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a {
    padding: 12px 14px;
    font-size: 16px;
  }
  .nav-cta .btn-ghost { display: none; }
  .nav-toggle { display: inline-flex; }
}
@media (max-width: 520px) {
  .nav-cta .btn-sm:not(#downloadBtn) { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: clamp(60px, 9vw, 120px) 0 clamp(60px, 8vw, 100px);
  overflow: hidden;
  background:
    var(--grad-hero-bg),
    var(--bg);
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.hero-bg .blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.6;
  animation: float 16s ease-in-out infinite;
}
.blob-emerald {
  width: 480px; height: 480px;
  background: radial-gradient(circle, var(--emerald-300), transparent 60%);
  top: -120px; left: -120px;
}
.blob-blue {
  width: 540px; height: 540px;
  background: radial-gradient(circle, var(--blue-200), transparent 60%);
  top: 80px; right: -180px;
  animation-delay: -6s;
}
.blob-soft {
  width: 320px; height: 320px;
  background: radial-gradient(circle, #FBCFE8, transparent 60%);
  bottom: -100px; left: 35%;
  animation-delay: -10s;
}
@keyframes float {
  0%, 100% { transform: translate(0,0) scale(1); }
  50%      { transform: translate(20px, -30px) scale(1.06); }
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: var(--slate-700);
  box-shadow: var(--shadow-xs);
}
.hero-title {
  margin: 18px 0 14px;
  font-size: clamp(34px, 5.4vw, 60px);
  font-weight: 800;
  letter-spacing: -0.035em;
}
.text-gradient {
  background: var(--grad-primary);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: clamp(15.5px, 1.6vw, 18px);
  color: var(--text-muted);
  max-width: 60ch;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 24px;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 22px;
  font-size: 13.5px;
  color: var(--slate-700);
}
.hero-trust li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--emerald-500);
  box-shadow: 0 0 0 4px rgba(16,185,129,0.15);
}

/* Hero visual: phone + floating cards */
.hero-visual { position: relative; height: 100%; }
.phone-frame {
  position: relative;
  width: min(360px, 90%);
  margin-inline: auto;
  aspect-ratio: 9 / 19;
  background: var(--bg-deep);
  border-radius: 44px;
  padding: 12px;
  box-shadow:
    0 50px 100px -20px rgba(2,6,23,0.35),
    0 30px 60px -10px rgba(2,6,23,0.20),
    inset 0 0 0 2px rgba(255,255,255,0.04);
}
.phone-frame::before {
  content: '';
  position: absolute;
  top: 14px; left: 50%;
  transform: translateX(-50%);
  width: 80px; height: 14px;
  background: #000;
  border-radius: 20px;
  z-index: 2;
}
.phone-screen {
  position: relative;
  width: 100%; height: 100%;
  border-radius: 32px;
  overflow: hidden;
  background: #000;
}
.phone-screen img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
}
.float-card {
  position: absolute;
  background: #fff;
  border-radius: 16px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-lg);
  animation: bob 6s ease-in-out infinite;
}
.float-card-1 {
  top: 22%; left: -16px;
  animation-delay: -2s;
}
.float-card-2 {
  bottom: 14%; right: -22px;
}
.float-icon {
  width: 36px; height: 36px;
  border-radius: 12px;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 19px;
  color: #fff;
}
.float-card strong {
  display: block;
  font-size: 14px;
  font-weight: 800;
  color: var(--slate-900);
}
.float-card span {
  display: block;
  font-size: 12px;
  color: var(--text-soft);
}
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-visual { order: -1; max-width: 340px; margin-inline: auto; }
}

/* ---------- Sections ---------- */
.section { padding: clamp(64px, 8vw, 110px) 0; }
.section-alt {
  background:
    linear-gradient(180deg, #fff 0%, var(--bg-alt) 50%, #fff 100%);
  border-block: 1px solid var(--border);
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-eyebrow {
  display: inline-block;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--emerald-700);
  background: var(--emerald-50);
  border: 1px solid var(--emerald-100);
}
.section-title {
  margin: 14px 0 12px;
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 800;
  letter-spacing: -0.03em;
}
.section-lead {
  font-size: clamp(15px, 1.5vw, 17px);
  color: var(--text-muted);
}
.section-lead.center { margin-inline: auto; }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.about-copy .section-eyebrow { margin-bottom: 14px; }
.about-copy .section-title { margin-bottom: 18px; }
.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 30px;
}
.stat-card {
  padding: 18px 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--grad-card);
  text-align: left;
  box-shadow: var(--shadow-xs);
  transition: transform var(--t-med), box-shadow var(--t-med);
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.stat-num {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--grad-primary);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.stat-label {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-soft);
  font-weight: 600;
}
.about-visual img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 920px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Features ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.feature-card {
  position: relative;
  padding: 26px 22px 22px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
  transition: transform var(--t-med), box-shadow var(--t-med),
              border-color var(--t-med);
}
.feature-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--grad-primary);
  opacity: 0;
  transition: opacity var(--t-med);
  z-index: -1;
}
.feature-card:hover {
  transform: translateY(-6px);
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  color: #fff;
}
.feature-card:hover .feature-icon { background: rgba(255,255,255,0.18); color: #fff; }
.feature-icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  background: var(--emerald-50);
  color: var(--emerald-700);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  transition: background var(--t-med), color var(--t-med);
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-card h3 {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 6px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
}
.feature-card:hover p { color: rgba(255,255,255,0.92); }

@media (max-width: 1080px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px)  { .features-grid { grid-template-columns: 1fr; } }

/* ---------- Categories ---------- */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.category-card {
  position: relative;
  display: block;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-med), box-shadow var(--t-med);
  isolation: isolate;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.category-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow) var(--easing);
}
.category-card:hover img { transform: scale(1.08); }
.cat-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 16px;
  color: #fff;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.05) 40%, rgba(0,0,0,0.85) 100%);
  background-color: color-mix(in srgb, var(--card-color, #0F172A) 18%, transparent);
}
.cat-overlay h3 {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.cat-overlay p {
  margin-top: 2px;
  font-size: 12.5px;
  opacity: 0.85;
  font-weight: 600;
}

@media (max-width: 1080px) { .categories-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 760px)  { .categories-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 480px)  { .categories-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Screenshots ---------- */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: end;
}
.screenshots-grid figure { margin: 0; text-align: center; }
.screenshots-grid figcaption {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--slate-700);
}
.phone-frame.phone-sm {
  width: min(260px, 100%);
  border-radius: 34px;
  padding: 8px;
}
.phone-frame.phone-sm .phone-screen { border-radius: 26px; }
.phone-frame.phone-sm::before {
  width: 60px; height: 12px;
  top: 12px;
}
.screenshots-grid figure:nth-child(2) .phone-frame {
  transform: translateY(-12px);
}

/* Phone-mockup glow halos + glassmorphism */
.screenshot-figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  perspective: 1000px;
}
.phone-frame.glow-emerald,
.phone-frame.glow-blue,
.phone-frame.glow-amber {
  position: relative;
  background: linear-gradient(160deg, #0F172A 0%, #1E293B 100%);
  box-shadow:
    0 30px 60px -10px rgba(2,6,23,0.45),
    0 18px 36px -12px rgba(2,6,23,0.30),
    inset 0 0 0 2px rgba(255,255,255,0.06);
}
.phone-frame.glow-emerald {
  background:
    radial-gradient(140% 80% at 50% 0%, rgba(16,185,129,0.25), transparent 55%),
    linear-gradient(160deg, #0F172A 0%, #1E293B 100%);
  box-shadow:
    0 30px 60px -10px rgba(16,185,129,0.45),
    0 18px 36px -12px rgba(2,6,23,0.30),
    inset 0 0 0 2px rgba(110,231,183,0.20);
}
.phone-frame.glow-blue {
  background:
    radial-gradient(140% 80% at 50% 0%, rgba(37,99,235,0.30), transparent 55%),
    linear-gradient(160deg, #0F172A 0%, #1E293B 100%);
  box-shadow:
    0 30px 60px -10px rgba(37,99,235,0.45),
    0 18px 36px -12px rgba(2,6,23,0.30),
    inset 0 0 0 2px rgba(147,197,253,0.20);
}
.phone-frame.glow-amber {
  background:
    radial-gradient(140% 80% at 50% 0%, rgba(245,158,11,0.25), transparent 55%),
    linear-gradient(160deg, #0F172A 0%, #1E293B 100%);
  box-shadow:
    0 30px 60px -10px rgba(245,158,11,0.40),
    0 18px 36px -12px rgba(2,6,23,0.30),
    inset 0 0 0 2px rgba(252,211,77,0.20);
}
.screenshot-figure figcaption {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--slate-600);
}
.screenshot-figure:nth-child(1) .phone-frame { animation: floatY 6s ease-in-out infinite; }
.screenshot-figure:nth-child(2) .phone-frame { animation: floatY 6s ease-in-out infinite -2s; }
.screenshot-figure:nth-child(3) .phone-frame { animation: floatY 6s ease-in-out infinite -4s; }
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}
.screenshot-figure:nth-child(2) .phone-frame {
  /* Layered transforms need to compose with the float animation. */
  animation: floatYMid 6s ease-in-out infinite -2s;
}
@keyframes floatYMid {
  0%, 100% { transform: translateY(-12px); }
  50%      { transform: translateY(-22px); }
}

/* Glassmorphic panel — used on the dashboard */
.glass-panel {
  position: relative;
  background: rgba(255,255,255,0.78);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255,255,255,0.55);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 760px) {
  .screenshots-grid { grid-template-columns: 1fr; }
  .screenshots-grid figure:nth-child(2) .phone-frame { transform: none; animation: none; }
  .screenshot-figure:nth-child(2) .phone-frame { animation: none; transform: none; }
}

/* ---------- FAQ ---------- */
.faq-wrap { max-width: 820px; margin-inline: auto; }
.faq-list { display: grid; gap: 12px; margin-top: 36px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 4px 18px;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--t-med), border-color var(--t-med);
}
.faq-item[open] {
  border-color: var(--emerald-200);
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 4px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .chev {
  width: 18px; height: 18px;
  color: var(--text-soft);
  transition: transform var(--t-med) var(--easing), color var(--t-med);
  flex-shrink: 0;
}
.faq-item[open] summary .chev {
  transform: rotate(180deg);
  color: var(--emerald-600);
}
.faq-body {
  padding: 0 4px 18px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.65;
}
.faq-body code {
  background: var(--slate-100);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 13.5px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  color: var(--emerald-700);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.contact-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: #fff;
  transition: transform var(--t-fast), box-shadow var(--t-med);
}
.contact-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.contact-icon {
  width: 46px; height: 46px;
  border-radius: 14px;
  background: var(--emerald-50);
  color: var(--emerald-700);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact-icon svg { width: 22px; height: 22px; }
.contact-item small {
  display: block;
  font-size: 12px;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  margin-bottom: 2px;
}
.contact-item a {
  font-size: 16px;
  font-weight: 700;
  color: var(--slate-900);
  transition: color var(--t-fast);
}
.contact-item a:hover { color: var(--emerald-600); }

.contact-cta-card {
  padding: 32px;
  border-radius: var(--radius-xl);
  background: var(--grad-primary);
  color: #fff;
  box-shadow: var(--shadow-lg);
  text-align: center;
}
.contact-cta-card h3 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.contact-cta-card p {
  margin: 6px 0 22px;
  opacity: 0.92;
}
.contact-cta-card .btn-ghost {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border-color: rgba(255,255,255,0.25);
  backdrop-filter: blur(4px);
}
.contact-cta-card .btn-ghost:hover { background: rgba(255,255,255,0.18); color: #fff; }
.contact-cta-card .btn-block + .btn-block { margin-top: 10px; }

@media (max-width: 920px) { .contact-grid { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-deep);
  color: #CBD5E1;
  padding: 60px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.site-footer .brand img { border-radius: 8px; }
.site-footer .brand-text { color: #fff; }
.site-footer h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}
.footer-tag {
  margin-top: 12px;
  font-size: 14px;
  color: #94A3B8;
  max-width: 32ch;
}
.site-footer ul { display: grid; gap: 10px; }
.site-footer ul a {
  font-size: 14.5px;
  color: #CBD5E1;
  transition: color var(--t-fast);
}
.site-footer ul a:hover { color: var(--emerald-300); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 22px;
  font-size: 13.5px;
  color: #94A3B8;
  flex-wrap: wrap;
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translate(-50%, 30px);
  min-width: 240px;
  max-width: min(92vw, 440px);
  padding: 14px 18px;
  border-radius: 14px;
  background: var(--slate-900);
  color: #fff;
  font-size: 14.5px;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--t-med) var(--easing), opacity var(--t-med);
  z-index: 100;
}
.toast.is-show {
  transform: translate(-50%, 0);
  opacity: 1;
  pointer-events: auto;
}
.toast.is-success { background: var(--emerald-600); }
.toast.is-error   { background: var(--red-600); }
.toast.is-info    { background: var(--blue-600); }

/* ---------- Accessibility ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Focus styles ---------- */
:focus-visible {
  outline: 3px solid var(--emerald-300);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- Print ---------- */
@media print {
  .site-header, .site-footer, .hero-bg, .toast, .nav-cta { display: none; }
  .section { padding: 20px 0; }
}