/* ============================================================
   Bookcheck Landing Page — Design System
   ============================================================ */

/* ---- CSS Variables ---- */
:root {
  /* Colors */
  --bg-primary: #06060c;
  --bg-secondary: #0d0d16;
  --bg-tertiary: #13131f;
  --accent: #CC0099;
  --accent-light: #FF4DCD;
  --accent-dark: #990073;
  --accent-glow: rgba(204, 0, 153, 0.25);
  --accent-glow-strong: rgba(204, 0, 153, 0.5);
  --text-primary: #eeeef5;
  --text-secondary: #9090aa;
  --text-muted: #55556a;
  --white-5: rgba(255, 255, 255, 0.05);
  --white-8: rgba(255, 255, 255, 0.08);
  --white-12: rgba(255, 255, 255, 0.12);
  --white-20: rgba(255, 255, 255, 0.20);

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-blur: 24px;

  /* Typography */
  --font-heading: 'Outfit', 'Noto Sans Thai', system-ui, sans-serif;
  --font-body: 'Inter', 'Noto Sans Thai', system-ui, sans-serif;

  /* Spacing */
  --section-py: clamp(80px, 10vw, 140px);
  --container-max: 1200px;
  --container-px: clamp(20px, 5vw, 40px);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration: 0.4s;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

button {
  border: none;
  cursor: pointer;
  font-family: inherit;
  background: transparent;
}

/* ---- Language Toggle Display ---- */
html[data-lang="en"] .lang-th { display: none !important; }
html[data-lang="th"] .lang-en { display: none !important; }

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 600;
}

.text-gradient {
  background: linear-gradient(135deg, var(--accent-light), var(--accent), #9900CC);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  max-width: 600px;
  margin: 0 auto;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-light);
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* ---- Layout ---- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-px);
  padding-right: var(--container-px);
}

section {
  padding: var(--section-py) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: clamp(48px, 6vw, 80px);
}

.section-header h2 {
  margin-bottom: 16px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--duration) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
  box-shadow: 0 4px 24px var(--accent-glow), 0 0 0 0 var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px var(--accent-glow-strong), 0 0 0 4px rgba(204, 0, 153, 0.1);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-ghost {
  border: 1px solid var(--white-12);
  color: var(--text-primary);
  backdrop-filter: blur(8px);
  background: var(--glass-bg);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  background: rgba(204, 0, 153, 0.05);
  transform: translateY(-2px);
}

.btn-icon {
  flex-shrink: 0;
  line-height: 1;
}

/* ---- Glass Card ---- */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: all var(--duration) var(--ease-out);
}

.glass-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--white-12);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all 0.3s ease;
}

.nav.scrolled {
  background: rgba(6, 6, 12, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 12px 0;
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--text-primary);
  z-index: 1001;
}

.nav-logo img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.25s ease;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--white-5);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 1001;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--white-5);
  border-radius: var(--radius-full);
  padding: 3px;
  border: 1px solid var(--glass-border);
}

.lang-btn {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all 0.25s ease;
}

.lang-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.nav-cta {
  padding: 10px 24px;
  font-size: 0.9rem;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 100px;
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* Gradient orbs behind hero */
.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(204, 0, 153, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  animation: heroOrb1 12s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(153, 0, 204, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  animation: heroOrb2 15s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

@keyframes heroOrb1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-40px, 30px) scale(1.1); }
  66% { transform: translate(20px, -20px) scale(0.95); }
}

@keyframes heroOrb2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -40px) scale(1.15); }
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: rgba(204, 0, 153, 0.1);
  border: 1px solid rgba(204, 0, 153, 0.2);
  color: var(--accent-light);
  font-size: 0.85rem;
  font-weight: 600;
  width: fit-content;
  animation: fadeInUp 0.8s var(--ease-out) 0.2s both;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-light);
  animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
  animation: fadeInUp 0.8s var(--ease-out) 0.4s both;
}

.hero-description {
  color: var(--text-secondary);
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  max-width: 520px;
  animation: fadeInUp 0.8s var(--ease-out) 0.6s both;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  animation: fadeInUp 0.8s var(--ease-out) 0.8s both;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 16px;
  animation: fadeInUp 0.8s var(--ease-out) 1s both;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat-value {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInUp 1s var(--ease-out) 0.6s both;
}

.hero-mockup {
  width: 100%;
  max-width: 480px;
  border-radius: var(--radius-xl);
  box-shadow:
    0 40px 80px rgba(0, 0, 0, 0.5),
    0 0 80px rgba(204, 0, 153, 0.1);
  animation: mockupFloat 6s ease-in-out infinite;
}

@keyframes mockupFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* Glow ring behind mockup */
.hero-visual::before {
  content: '';
  position: absolute;
  width: 90%;
  height: 90%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(204, 0, 153, 0.15), transparent 65%);
  filter: blur(40px);
  z-index: -1;
}

/* ============================================================
   FEATURES
   ============================================================ */
#features {
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-card {
  padding: clamp(28px, 3vw, 40px);
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--duration) ease;
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(204, 0, 153, 0.15), rgba(204, 0, 153, 0.05));
  border: 1px solid rgba(204, 0, 153, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
}

.feature-icon svg {
  flex-shrink: 0;
}

.feature-card h3 {
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

/* Connection line */
.steps-grid::before {
  content: '';
  position: absolute;
  top: 50px;
  left: calc(16.666% + 16px);
  right: calc(16.666% + 16px);
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light), var(--accent));
  opacity: 0.3;
}

.step-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 32px 24px;
}

.step-number {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  position: relative;
  z-index: 1;
  box-shadow: 0 8px 32px var(--accent-glow);
}

.step-icon {
  color: var(--accent-light);
  margin-bottom: -8px;
  line-height: 1;
}

.step-icon svg {
  flex-shrink: 0;
}

.step-card h3 {
  color: var(--text-primary);
}

.step-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ============================================================
   APP PREVIEW
   ============================================================ */
#preview {
  background: var(--bg-secondary);
}

.preview-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  box-shadow:
    0 40px 100px rgba(0, 0, 0, 0.4),
    0 0 80px rgba(204, 0, 153, 0.06);
}

.preview-wrapper img {
  width: 100%;
  display: block;
}

/* Gradient overlay on edges */
.preview-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(13, 13, 22, 0.1) 0%,
    transparent 15%,
    transparent 85%,
    rgba(13, 13, 22, 0.4) 100%
  );
  pointer-events: none;
}

/* Glow behind preview */
.preview-glow {
  position: absolute;
  bottom: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 200px;
  background: radial-gradient(ellipse, rgba(204, 0, 153, 0.12), transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: -1;
}

/* ============================================================
   TECH STACK
   ============================================================ */
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 28px;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: all var(--duration) var(--ease-out);
}

.tech-badge:hover {
  border-color: var(--white-20);
  background: var(--white-5);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.tech-badge-icon {
  color: var(--accent-light);
  flex-shrink: 0;
}

/* ============================================================
   FAQ
   ============================================================ */
#faq {
  background: var(--bg-secondary);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--white-12);
}

.faq-item.active {
  border-color: rgba(204, 0, 153, 0.2);
  background: rgba(204, 0, 153, 0.03);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 24px;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
}

.faq-chevron {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.3s var(--ease-out);
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
  color: var(--accent-light);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out), padding 0.4s var(--ease-out);
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(204, 0, 153, 0.15), transparent 65%);
  filter: blur(60px);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  margin-bottom: 16px;
}

.cta-content p {
  color: var(--text-secondary);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: 60px 0 32px;
  border-top: 1px solid var(--glass-border);
  background: var(--bg-primary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
}

.footer-brand-logo img {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 280px;
}

.footer-column h4 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-column a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.25s ease;
}

.footer-column a:hover {
  color: var(--accent-light);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid var(--glass-border);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a:hover {
  color: var(--accent-light);
}

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Staggered card animations */
.feature-card.reveal:nth-child(1) { transition-delay: 0s; }
.feature-card.reveal:nth-child(2) { transition-delay: 0.1s; }
.feature-card.reveal:nth-child(3) { transition-delay: 0.2s; }
.feature-card.reveal:nth-child(4) { transition-delay: 0.3s; }

.step-card.reveal:nth-child(1) { transition-delay: 0s; }
.step-card.reveal:nth-child(2) { transition-delay: 0.15s; }
.step-card.reveal:nth-child(3) { transition-delay: 0.3s; }

/* ============================================================
   KEYFRAME ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* ============================================================
   RESPONSIVE — TABLET (< 1024px)
   ============================================================ */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    align-items: center;
  }

  .hero-description {
    max-width: 600px;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }

  .hero-mockup {
    max-width: 360px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* ============================================================
   RESPONSIVE — MOBILE (< 768px)
   ============================================================ */
@media (max-width: 768px) {
  /* Nav mobile */
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: rgba(6, 6, 12, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 32px 40px;
    gap: 8px;
    transition: right 0.4s var(--ease-out);
    border-left: 1px solid var(--glass-border);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-link {
    font-size: 1.1rem;
    padding: 12px 0;
    width: 100%;
  }

  .hamburger {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

  /* Overlay */
  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
  }

  .nav-overlay.visible {
    opacity: 1;
    visibility: visible;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding-top: 120px;
    padding-bottom: 60px;
  }

  .hero-mockup {
    max-width: 280px;
  }

  .hero-stats {
    gap: 24px;
  }

  .hero-stat-value {
    font-size: 1.5rem;
  }

  /* Features */
  .features-grid {
    grid-template-columns: 1fr;
  }

  /* Steps */
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .steps-grid::before {
    display: none;
  }

  .step-card {
    text-align: left;
    flex-direction: row;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
  }

  .step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
  }

  .step-text {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* ============================================================
   RESPONSIVE — SMALL MOBILE (< 480px)
   ============================================================ */
@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.6rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 12px;
    align-items: center;
  }

  .feature-card {
    padding: 24px;
  }

  .tech-badge {
    padding: 12px 20px;
    font-size: 0.85rem;
  }

  .faq-question {
    padding: 16px 20px;
    font-size: 0.95rem;
  }

  .faq-answer-inner {
    padding: 0 20px 16px;
  }
}

/* ============================================================
   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-width: 0;
}

/* Smooth scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--white-12);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--white-20);
}

/* Selection color */
::selection {
  background: rgba(204, 0, 153, 0.3);
  color: #fff;
}