/* =========================================
   StudentAI.fr — Main Stylesheet
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- CSS Variables --- */
:root {
  --bg-primary: #080c14;
  --bg-secondary: #0d1320;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.3);

  --accent-blue: #38bdf8;
  --accent-cyan: #22d3ee;
  --accent-purple: #a78bfa;
  --accent-blue-dim: rgba(56, 189, 248, 0.15);

  --text-primary: #f0f6ff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --gradient-hero: linear-gradient(135deg, #0ea5e9 0%, #6366f1 50%, #a855f7 100%);
  --gradient-card: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, rgba(167, 139, 250, 0.05) 100%);
  --gradient-cta: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-glow: 0 0 40px rgba(56, 189, 248, 0.15);
  --shadow-card: 0 4px 32px rgba(0, 0, 0, 0.4);
  --shadow-button: 0 4px 20px rgba(56, 189, 248, 0.35);

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

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

ul {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }

p { color: var(--text-secondary); }

/* --- Layout --- */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

/* --- Utility --- */
.gradient-text {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--accent-blue-dim);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-blue);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.7); }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.btn-primary {
  background: var(--gradient-cta);
  color: #fff;
  box-shadow: var(--shadow-button);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(56, 189, 248, 0.45);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.btn-ghost:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: var(--accent-blue-dim);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-outline:hover {
  border-color: rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.05);
}

.btn-large {
  padding: 17px 36px;
  font-size: 1rem;
  border-radius: var(--radius-md);
}

/* =========================================
   NAVIGATION
   ========================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all 0.4s ease;
}

.navbar.scrolled {
  background: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 0;
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.nav-logo-icon {
  width: 34px;
  height: 34px;
  background: var(--gradient-cta);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav-logo-icon svg {
  width: 18px;
  height: 18px;
  fill: white;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-links a:hover {
  color: var(--text-primary);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.mobile-menu a:hover {
  color: var(--text-primary);
}

.mobile-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
}

/* =========================================
   HERO SECTION
   ========================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  overflow: hidden;
}

/* Background grid */
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}

.hero-glow-1 {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(56, 189, 248, 0.12) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-glow-2 {
  position: absolute;
  top: 30%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(167, 139, 250, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-glow-3 {
  position: absolute;
  top: 20%;
  left: -5%;
  width: 350px;
  height: 350px;
  background: radial-gradient(ellipse, rgba(34, 211, 238, 0.06) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
  padding: 60px 0 80px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-headline {
  margin-bottom: 24px;
  color: var(--text-primary);
}

.hero-headline .line-1 {
  display: block;
  font-size: clamp(1.8rem, 4.5vw, 3.2rem);
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.hero-headline .line-2 {
  display: block;
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 900;
  letter-spacing: -0.03em;
}

.hero-subheadline {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 480px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-demo-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.hero-demo-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.hero-demo-link:hover {
  color: var(--accent-blue);
}

.hero-demo-link:hover svg {
  transform: translateX(3px);
}

.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

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

.hero-stat-number {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 3px;
}

/* Hero visual — App mockup */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-mockup {
  position: relative;
  width: 100%;
  max-width: 480px;
}

.mockup-window {
  background: rgba(13, 19, 32, 0.9);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 24px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card), 0 0 80px rgba(56, 189, 248, 0.1);
  position: relative;
  overflow: hidden;
}

.mockup-window::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.5), transparent);
}

.mockup-titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.titlebar-dots {
  display: flex;
  gap: 6px;
}

.titlebar-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.titlebar-dot.red { background: #ff5f57; }
.titlebar-dot.yellow { background: #ffbd2e; }
.titlebar-dot.green { background: #28ca42; }

.titlebar-label {
  flex: 1;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.chat-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 280px;
}

.chat-msg {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.chat-msg.user {
  flex-direction: row-reverse;
}

.chat-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
}

.chat-avatar.ai-avatar {
  background: var(--gradient-cta);
  color: white;
}

.chat-avatar.user-avatar {
  background: rgba(255,255,255,0.1);
  color: var(--text-secondary);
  font-size: 0.7rem;
}

.chat-bubble {
  max-width: 75%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 0.82rem;
  line-height: 1.5;
}

.chat-msg.ai .chat-bubble {
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.15);
  color: var(--text-primary);
  border-radius: 4px 14px 14px 14px;
}

.chat-msg.user .chat-bubble {
  background: var(--gradient-cta);
  color: white;
  border-radius: 14px 4px 14px 14px;
}

.chat-typing {
  display: flex;
  align-items: center;
  gap: 10px;
}

.typing-dots {
  display: flex;
  gap: 4px;
  padding: 10px 14px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.15);
  border-radius: 4px 14px 14px 14px;
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-blue);
  animation: typing 1.4s ease-in-out infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

.mockup-input-bar {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
}

.mockup-input {
  flex: 1;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 8px 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-main);
}

.mockup-send {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gradient-cta);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mockup-send svg {
  width: 14px;
  height: 14px;
  fill: white;
}

/* Floating badges on mockup */
.float-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(13, 19, 32, 0.95);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  animation: float 4s ease-in-out infinite;
}

.float-badge-1 {
  top: -16px;
  right: -20px;
  animation-delay: 0s;
}

.float-badge-2 {
  bottom: 40px;
  left: -24px;
  animation-delay: 2s;
}

.float-badge-icon {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.float-badge-icon.green { background: rgba(34, 197, 94, 0.2); }
.float-badge-icon.blue { background: rgba(56, 189, 248, 0.2); }

.float-badge-icon svg {
  width: 14px;
  height: 14px;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

/* =========================================
   SOCIAL PROOF BAR
   ========================================= */
.proof-bar {
  padding: 28px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(255,255,255,0.015);
  overflow: hidden;
}

.proof-bar-inner {
  display: flex;
  align-items: center;
  gap: 20px;
}

.proof-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
  flex-shrink: 0;
  padding-right: 20px;
  border-right: 1px solid var(--border-subtle);
}

.proof-logos {
  display: flex;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
}

.proof-logo-item {
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0.45;
  transition: opacity 0.3s ease;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
}

.proof-logo-item:hover {
  opacity: 0.8;
}

.proof-logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.08);
}

.proof-logo-icon svg {
  width: 16px;
  height: 16px;
}

.proof-divider {
  width: 1px;
  height: 20px;
  background: var(--border-subtle);
  flex-shrink: 0;
}

.proof-stat-group {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
  flex-shrink: 0;
}

.proof-stat {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
}

.proof-stat-num {
  font-weight: 800;
  color: var(--accent-blue);
}

.proof-stat-text {
  color: var(--text-muted);
}

/* =========================================
   FEATURES SECTION
   ========================================= */
.features {
  background: var(--bg-primary);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

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

.section-header p {
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.4), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

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

.feature-card.featured {
  grid-column: span 2;
  background: var(--gradient-card);
  border-color: rgba(56, 189, 248, 0.15);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  position: relative;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-icon.blue {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-blue);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.2) inset;
}

.feature-icon.purple {
  background: rgba(167, 139, 250, 0.15);
  color: var(--accent-purple);
  box-shadow: 0 0 0 1px rgba(167, 139, 250, 0.2) inset;
}

.feature-icon.cyan {
  background: rgba(34, 211, 238, 0.15);
  color: var(--accent-cyan);
  box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.2) inset;
}

.feature-icon.green {
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
  box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.2) inset;
}

.feature-card h3 {
  margin-bottom: 10px;
  color: var(--text-primary);
  font-size: 1.15rem;
}

.feature-card p {
  font-size: 0.9rem;
  line-height: 1.65;
}

.feature-card-visual {
  position: relative;
}

.mini-chat {
  background: rgba(8, 12, 20, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 0.78rem;
}

.mini-chat-row {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-bottom: 10px;
}

.mini-chat-row:last-child {
  margin-bottom: 0;
}

.mini-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-top: 5px;
  flex-shrink: 0;
}

.mini-dot.blue { background: var(--accent-blue); }
.mini-dot.gray { background: rgba(255,255,255,0.2); }

.mini-chat-text {
  color: var(--text-secondary);
  line-height: 1.4;
}

.mini-chat-text.highlight {
  color: var(--accent-cyan);
  font-weight: 600;
}

/* =========================================
   HOW IT WORKS
   ========================================= */
.how-it-works {
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.how-bg-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(99, 102, 241, 0.07) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.steps-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.steps-connector {
  position: absolute;
  top: 40px;
  left: calc(33.33% - 20px);
  right: calc(33.33% - 20px);
  height: 1px;
  background: linear-gradient(90deg, rgba(56, 189, 248, 0.5) 0%, rgba(167, 139, 250, 0.5) 100%);
  pointer-events: none;
}

.steps-connector::before,
.steps-connector::after {
  content: '';
  position: absolute;
  top: -3px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-blue);
}

.steps-connector::before { left: 0; }
.steps-connector::after { right: 0; background: var(--accent-purple); }

.step-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 36px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  position: relative;
  transition: var(--transition);
}

.step-card:hover {
  border-color: rgba(56, 189, 248, 0.2);
  transform: translateY(-4px);
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 20px;
  position: relative;
}

.step-number.n1 {
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.step-number.n2 {
  background: rgba(99, 102, 241, 0.12);
  color: #818cf8;
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.step-number.n3 {
  background: rgba(167, 139, 250, 0.12);
  color: var(--accent-purple);
  border: 1px solid rgba(167, 139, 250, 0.25);
}

.step-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-icon svg {
  width: 40px;
  height: 40px;
}

.step-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.step-card p {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* =========================================
   TESTIMONIALS
   ========================================= */
.testimonials {
  background: var(--bg-primary);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: rgba(56, 189, 248, 0.15);
  transform: translateY(-3px);
}

.testimonial-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 16px;
}

.star {
  width: 14px;
  height: 14px;
  fill: #f59e0b;
}

.testimonial-quote {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.author-avatar.av1 { background: linear-gradient(135deg, #38bdf8, #6366f1); color: white; }
.author-avatar.av2 { background: linear-gradient(135deg, #a78bfa, #ec4899); color: white; }
.author-avatar.av3 { background: linear-gradient(135deg, #22d3ee, #22c55e); color: white; }

.author-info h4 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.author-info span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.testimonial-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-blue);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

/* =========================================
   CTA SECTION
   ========================================= */
.cta-section {
  background: var(--bg-secondary);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.cta-bg-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(56, 189, 248, 0.08) 0%, rgba(99, 102, 241, 0.05) 40%, transparent 70%);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.cta-urgency {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.2);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #fbbf24;
  margin-bottom: 28px;
}

.urgency-icon {
  width: 14px;
  height: 14px;
  fill: #fbbf24;
}

.cta-section h2 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  margin-bottom: 20px;
  color: var(--text-primary);
}

.cta-section .subtext {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.7;
}

.cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.cta-note {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.cta-features-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.cta-feature-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.83rem;
  color: var(--text-muted);
}

.cta-feature-item svg {
  width: 14px;
  height: 14px;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

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

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-subtle);
}

.footer-brand p {
  font-size: 0.87rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-top: 12px;
  max-width: 280px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.social-link {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: var(--transition);
}

.social-link:hover {
  background: var(--accent-blue-dim);
  border-color: rgba(56, 189, 248, 0.3);
  color: var(--accent-blue);
}

.social-link svg {
  width: 15px;
  height: 15px;
}

.footer-col h4 {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

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

.footer-col ul li a {
  font-size: 0.87rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--text-secondary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: 20px;
}

.footer-legal a {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-legal a:hover {
  color: var(--text-secondary);
}

/* =========================================
   SCROLL ANIMATIONS
   ========================================= */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up.delay-1 { transition-delay: 0.1s; }
.fade-up.delay-2 { transition-delay: 0.2s; }
.fade-up.delay-3 { transition-delay: 0.3s; }
.fade-up.delay-4 { transition-delay: 0.4s; }
.fade-up.delay-5 { transition-delay: 0.5s; }

.fade-in {
  opacity: 0;
  transition: opacity 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1024px) {
  .hero-inner {
    gap: 40px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-menu {
    display: flex;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
  }

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

  .hero-headline .line-1,
  .hero-headline .line-2 {
    text-align: center;
  }

  .hero-subheadline {
    text-align: center;
    max-width: 100%;
  }

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

  .hero-mockup {
    max-width: 360px;
    margin: 0 auto;
  }

  .float-badge-1 {
    right: -10px;
  }

  .float-badge-2 {
    left: -10px;
  }

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

  .feature-card.featured {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }

  .steps-container {
    grid-template-columns: 1fr;
  }

  .steps-connector {
    display: none;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .proof-stat-group {
    display: none;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 72px 0;
  }

  .container {
    padding: 0 16px;
  }

  .hero {
    padding-top: 72px;
  }

  .hero-inner {
    padding: 32px 0 56px;
  }

  .hero-cta-group {
    flex-direction: column;
    align-items: center;
  }

  .btn-large {
    width: 100%;
    max-width: 320px;
  }

  .proof-bar-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .proof-label {
    border-right: none;
    padding-right: 0;
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-buttons .btn {
    width: 100%;
  }
}

/* =========================================
   CUSTOM SCROLLBAR
   ========================================= */
::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: rgba(56, 189, 248, 0.25);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(56, 189, 248, 0.4);
}

/* =========================================
   SELECTION
   ========================================= */
::selection {
  background: rgba(56, 189, 248, 0.25);
  color: var(--text-primary);
}