/* =============================================
   STUDENTAI — LANDING PAGE STYLES
   Palette: #1a3a5c (deep blue), #7c3aed (violet)
   ============================================= */

/* ---- CSS Variables ---- */
:root {
  --color-bg: #0a0f1e;
  --color-bg-2: #0d1530;
  --color-bg-card: #111827;
  --color-bg-card-hover: #1a2236;
  --color-border: rgba(255,255,255,0.08);
  --color-border-hover: rgba(124,58,237,0.4);

  --color-primary: #7c3aed;
  --color-primary-light: #9d5ffa;
  --color-primary-dark: #5b21b6;
  --color-blue: #1a3a5c;
  --color-blue-light: #2563eb;
  --color-indigo: #818cf8;

  --color-text: #f1f5f9;
  --color-text-muted: #94a3b8;
  --color-text-subtle: #64748b;

  --color-white: #ffffff;
  --color-success: #10b981;
  --color-danger: #ef4444;

  --font-heading: 'Plus Jakarta Sans', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 24px 64px rgba(0,0,0,0.5);
  --shadow-purple: 0 0 40px rgba(124,58,237,0.3);
  --shadow-purple-lg: 0 0 80px rgba(124,58,237,0.2);

  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light theme */
[data-theme="light"] {
  --color-bg: #f8fafc;
  --color-bg-2: #f0f4ff;
  --color-bg-card: #ffffff;
  --color-bg-card-hover: #f8fafc;
  --color-border: rgba(0,0,0,0.08);
  --color-border-hover: rgba(124,58,237,0.3);
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-text-subtle: #94a3b8;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.1);
  --shadow-lg: 0 24px 64px rgba(0,0,0,0.12);
}

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

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

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

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: linear-gradient(135deg, #7c3aed, #818cf8, #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Fade-in Animations ---- */
.fade-in-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 15px;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
  font-family: var(--font-body);
}

.btn svg, .btn i { width: 18px; height: 18px; flex-shrink: 0; }

.btn-primary {
  background: linear-gradient(135deg, #7c3aed, #5b21b6);
  color: white;
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #9d5ffa, #7c3aed);
  box-shadow: 0 6px 30px rgba(124,58,237,0.6);
  transform: translateY(-2px);
}

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

.btn-ghost {
  background: rgba(255,255,255,0.08);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.14);
  border-color: rgba(124,58,237,0.4);
}

.btn-ghost-hero {
  background: rgba(255,255,255,0.06);
  color: white;
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 15px;
  transition: all var(--transition);
}

.btn-ghost-hero:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.4);
  transform: translateY(-2px);
}

.btn-ghost-hero svg, .btn-ghost-hero i { width: 18px; height: 18px; }

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 15px;
  transition: all var(--transition);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(124,58,237,0.06);
}

.btn-large {
  padding: 16px 36px;
  font-size: 17px;
}

/* ---- Section Shared ---- */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(124,58,237,0.15);
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: var(--radius-full);
  color: var(--color-primary-light);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

/* =============================================
   HEADER / NAV
   ============================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: background var(--transition-slow), box-shadow var(--transition-slow), padding var(--transition);
}

.header.scrolled {
  background: rgba(10, 15, 30, 0.9);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--color-border);
  padding: 12px 0;
}

[data-theme="light"] .header.scrolled {
  background: rgba(248, 250, 252, 0.9);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon { display: flex; align-items: center; }

.logo-text {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text);
}

.logo-ai { color: var(--color-primary); }

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

.nav-link {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  transition: color var(--transition), background var(--transition);
}

.nav-link:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.06);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.12);
}

.theme-toggle i { width: 18px; height: 18px; }

[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.nav-cta-ghost {
  font-size: 14px;
  padding: 9px 18px;
  border-radius: var(--radius-full);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.nav-cta-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.nav-cta {
  font-size: 14px;
  padding: 9px 20px;
}

.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.06);
}

.mobile-menu-toggle i { width: 22px; height: 22px; }

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #040812 0%, #0a0f1e 40%, #150d2e 100%);
  padding-top: 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}

.hero-orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.25) 0%, transparent 70%);
  top: -100px;
  right: -100px;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(26,58,92,0.4) 0%, transparent 70%);
  bottom: -50px;
  left: -50px;
}

.hero-orb-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(99,102,241,0.15) 0%, transparent 70%);
  top: 40%;
  left: 30%;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 60px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(124,58,237,0.15);
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: var(--radius-full);
  color: #c4b5fd;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #7c3aed;
  box-shadow: 0 0 8px #7c3aed;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 8px #7c3aed; }
  50% { box-shadow: 0 0 16px #7c3aed; }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(36px, 4.5vw, 60px);
  font-weight: 900;
  line-height: 1.1;
  color: white;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 18px;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
  margin-bottom: 40px;
  max-width: 520px;
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  font-weight: 500;
}

.trust-item i {
  width: 16px;
  height: 16px;
  color: var(--color-success);
}

/* Brain/Visual container */
.brain-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brain-glow {
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(124,58,237,0.2) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
}

.brain-svg {
  width: 100%;
  max-width: 440px;
  height: auto;
  position: relative;
  z-index: 1;
}

/* Chat bubbles */
.chat-bubble {
  position: absolute;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  max-width: 280px;
  z-index: 2;
  box-shadow: var(--shadow-md);
}

.chat-bubble-1 {
  bottom: 60px;
  right: -20px;
  animation: float1 4s ease-in-out infinite;
}

.chat-bubble-2 {
  top: 60px;
  left: -30px;
  animation: float2 4s ease-in-out infinite 1s;
}

@keyframes float1 {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

@keyframes float2 {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(8px); }
}

.chat-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #7c3aed, #818cf8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.chat-avatar.student {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
}

.chat-avatar i { width: 16px; height: 16px; }

.chat-text {
  font-size: 12px;
  color: rgba(255,255,255,0.9);
  line-height: 1.5;
}

/* Progress floating card */
.floating-card {
  position: absolute;
  background: rgba(17,24,39,0.9);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  z-index: 2;
  box-shadow: var(--shadow-lg);
}

.progress-card {
  bottom: -20px;
  left: -40px;
  min-width: 220px;
  animation: float3 5s ease-in-out infinite 0.5s;
}

@keyframes float3 {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-6px); }
}

.progress-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.progress-header i { width: 14px; height: 14px; color: var(--color-primary); }

.progress-bar-wrap {
  margin-bottom: 10px;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 6px;
  font-weight: 500;
}

.progress-pct {
  color: var(--color-success);
  font-weight: 600;
}

.progress-bar {
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #7c3aed, #818cf8);
  border-radius: var(--radius-full);
  transition: width 1.5s ease;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.4);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  animation: bounce-scroll 2s ease-in-out infinite;
  z-index: 1;
}

.scroll-arrow i { width: 20px; height: 20px; }

@keyframes bounce-scroll {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* =============================================
   STATS
   ============================================= */
.stats-section {
  padding: 80px 0;
  position: relative;
}

.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,58,92,0.1), rgba(124,58,237,0.05));
}

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

.stat-item {
  text-align: center;
  padding: 48px 32px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(124,58,237,0.6), transparent);
}

.stat-item:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-purple);
}

.stat-icon {
  width: 56px;
  height: 56px;
  background: rgba(124,58,237,0.15);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--color-primary);
}

.stat-icon i { width: 28px; height: 28px; }

.stat-number {
  font-family: var(--font-heading);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 900;
  color: var(--color-text);
  display: inline;
  line-height: 1;
}

.stat-suffix {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  display: inline;
}

.stat-label {
  margin-top: 12px;
  font-size: 15px;
  color: var(--color-text-muted);
  font-weight: 500;
  line-height: 1.5;
}

/* =============================================
   HOW IT WORKS
   ============================================= */
.how-section {
  padding: 100px 0;
  background: var(--color-bg-2);
  position: relative;
  overflow: hidden;
}

.how-section::before {
  content: '';
  position: absolute;
  top: -200px;
  left: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0;
  align-items: start;
}

.step-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 16px 0;
  color: var(--color-primary-light);
  opacity: 0.5;
}

.step-connector i { width: 32px; height: 32px; }

.step-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.step-item:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-purple);
}

.step-number {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 64px;
  font-weight: 900;
  color: rgba(124,58,237,0.06);
  font-family: var(--font-heading);
  line-height: 1;
  user-select: none;
}

.step-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(26,58,92,0.3));
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: var(--color-primary);
  position: relative;
}

.step-icon-2 {
  background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(124,58,237,0.2));
  border-color: rgba(99,102,241,0.3);
  color: #818cf8;
}

.step-icon-3 {
  background: linear-gradient(135deg, rgba(16,185,129,0.15), rgba(99,102,241,0.1));
  border-color: rgba(16,185,129,0.3);
  color: #10b981;
}

.step-icon i { width: 32px; height: 32px; }

.step-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.step-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.step-demo {
  margin-top: 20px;
}

.demo-input {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--color-text-muted);
  text-align: left;
}

.demo-input i { width: 16px; height: 16px; color: var(--color-primary); flex-shrink: 0; }

.demo-response {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(124,58,237,0.08);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: var(--radius-md);
  font-size: 12px;
  color: rgba(255,255,255,0.8);
  text-align: left;
  line-height: 1.5;
}

.response-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  margin-top: 4px;
  flex-shrink: 0;
  animation: pulse-dot 1.5s infinite;
}

.demo-score {
  display: flex;
  justify-content: center;
}

.score-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: rgba(16,185,129,0.12);
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 700;
  color: #10b981;
}

.score-badge i { width: 16px; height: 16px; }

/* =============================================
   FEATURES
   ============================================= */
.features-section {
  padding: 100px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 50%, rgba(124,58,237,0.03));
  pointer-events: none;
}

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

.feature-icon-wrap {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon-wrap i { width: 28px; height: 28px; }

.feature-icon-purple {
  background: rgba(124,58,237,0.15);
  color: #7c3aed;
  border: 1px solid rgba(124,58,237,0.25);
}

.feature-icon-blue {
  background: rgba(37,99,235,0.12);
  color: #60a5fa;
  border: 1px solid rgba(37,99,235,0.25);
}

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

.feature-icon-violet {
  background: rgba(139,92,246,0.12);
  color: #a78bfa;
  border: 1px solid rgba(139,92,246,0.25);
}

.feature-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.feature-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(124,58,237,0.1);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  color: #a78bfa;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.feature-highlight {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 32px 40px;
  background: linear-gradient(135deg, rgba(124,58,237,0.15), rgba(26,58,92,0.2));
  border: 1px solid rgba(124,58,237,0.25);
  border-radius: var(--radius-xl);
  gap: 24px;
  flex-wrap: wrap;
}

.highlight-content {
  display: flex;
  align-items: center;
  gap: 20px;
}

.highlight-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #7c3aed, #5b21b6);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 16px rgba(124,58,237,0.4);
  flex-shrink: 0;
}

.highlight-icon i { width: 24px; height: 24px; }

.highlight-text h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.highlight-text p {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* =============================================
   TESTIMONIALS
   ============================================= */
.testimonials-section {
  padding: 100px 0;
  background: var(--color-bg-2);
  position: relative;
  overflow: hidden;
}

.testimonials-section::after {
  content: '';
  position: absolute;
  bottom: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.testimonial-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
}

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

.testimonial-featured {
  border-color: rgba(124,58,237,0.3);
  background: linear-gradient(135deg, var(--color-bg-card), rgba(124,58,237,0.04));
}

.featured-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  background: linear-gradient(135deg, #7c3aed, #5b21b6);
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  color: white;
  white-space: nowrap;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.stars {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
}

.stars i {
  width: 18px;
  height: 18px;
  color: #fbbf24;
  fill: #fbbf24;
}

.testimonial-quote {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 24px;
  font-style: normal;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: white;
  flex-shrink: 0;
}

.avatar-1 { background: linear-gradient(135deg, #7c3aed, #6d28d9); }
.avatar-2 { background: linear-gradient(135deg, #2563eb, #1a3a5c); }
.avatar-3 { background: linear-gradient(135deg, #059669, #0891b2); }

.author-name {
  font-weight: 700;
  font-size: 15px;
  color: var(--color-text);
}

.author-subject {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* Social proof bar */
.social-proof-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 28px 40px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  flex-wrap: wrap;
}

.proof-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 32px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.proof-item strong { color: var(--color-text); }
.proof-item i { width: 18px; height: 18px; color: var(--color-primary); }

.proof-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

/* =============================================
   PRICING
   ============================================= */
.pricing-section {
  padding: 100px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
  margin-bottom: 40px;
}

.pricing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  position: relative;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.pricing-featured {
  border-color: rgba(124,58,237,0.4);
  background: linear-gradient(135deg, rgba(124,58,237,0.08), var(--color-bg-card));
  transform: scale(1.03);
  box-shadow: var(--shadow-purple);
}

.pricing-featured:hover {
  transform: scale(1.03) translateY(-4px);
  box-shadow: var(--shadow-purple-lg);
}

.featured-label {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 20px;
  background: linear-gradient(135deg, #7c3aed, #5b21b6);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  color: white;
  white-space: nowrap;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 4px 16px rgba(124,58,237,0.4);
}

.plan-name {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.plan-price {
  margin-bottom: 12px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 900;
  color: var(--color-text);
  line-height: 1;
}

.price-period {
  font-size: 16px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.plan-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  line-height: 1.6;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text);
}

.plan-features li i { width: 18px; height: 18px; flex-shrink: 0; }
.plan-features li:not(.feature-disabled) i { color: var(--color-success); }

.feature-disabled {
  opacity: 0.35;
}

.feature-disabled i { color: var(--color-danger) !important; }

.plan-cta {
  width: 100%;
  justify-content: center;
  margin-bottom: 16px;
}

.plan-note {
  text-align: center;
  font-size: 12px;
  color: var(--color-text-subtle);
}

.pricing-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 20px;
  color: var(--color-text-muted);
  font-size: 14px;
}

.pricing-guarantee i {
  width: 20px;
  height: 20px;
  color: var(--color-success);
}

/* =============================================
   FAQ
   ============================================= */
.faq-section {
  padding: 100px 0;
  background: var(--color-bg-2);
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item:hover, .faq-item.open {
  border-color: rgba(124,58,237,0.3);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  transition: color var(--transition);
  font-family: var(--font-body);
}

.faq-question:hover { color: var(--color-primary-light); }

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-primary);
  transition: transform var(--transition);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

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

.faq-answer p {
  padding: 0 28px 24px;
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* =============================================
   FOOTER CTA
   ============================================= */
.footer-cta-section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #040812 0%, #0a0f1e 50%, #150d2e 100%);
}

.footer-cta-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.footer-cta-orb {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.2) 0%, transparent 70%);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  filter: blur(60px);
}

.footer-cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.footer-cta-title {
  font-family: var(--font-heading);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 900;
  color: white;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.footer-cta-subtitle {
  font-size: 18px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 40px;
}

.footer-cta-trust {
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}

.dot-sep { opacity: 0.4; }

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: #040812;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 32px;
}

.footer-tagline {
  font-size: 14px;
  color: rgba(255,255,255,0.45);
  margin: 12px 0 20px;
  max-width: 200px;
  line-height: 1.6;
}

.footer-socials {
  display: flex;
  gap: 10px;
}

.social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.45);
  transition: all var(--transition);
}

.social-link:hover {
  background: rgba(124,58,237,0.15);
  border-color: rgba(124,58,237,0.3);
  color: var(--color-primary-light);
}

.social-link i { width: 16px; height: 16px; }

.footer-links-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-links-title {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

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

.footer-links-col a {
  font-size: 14px;
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
}

.footer-links-col a:hover {
  color: rgba(255,255,255,0.8);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255,255,255,0.25);
  flex-wrap: wrap;
  gap: 12px;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
  }

  .hero-subtitle { max-width: 600px; margin-left: auto; margin-right: auto; }
  .hero-ctas { justify-content: center; }
  .hero-trust { justify-content: center; }

  .brain-container { max-width: 440px; margin: 0 auto; }

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

  .step-connector {
    padding: 0;
    transform: rotate(90deg);
    justify-content: center;
  }

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

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin-left: auto;
    margin-right: auto;
  }

  .pricing-featured { transform: none; }
  .pricing-featured:hover { transform: translateY(-4px); }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .stats-grid { grid-template-columns: 1fr; gap: 16px; }

  .social-proof-bar {
    flex-direction: column;
    padding: 24px;
    gap: 16px;
  }

  .proof-divider { display: none; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-actions .nav-cta-ghost { display: none; }
  .nav-actions .nav-cta { display: none; }
  .mobile-menu-toggle { display: flex; }

  #navLinks.mobile-open {
    display: flex;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10,15,30,0.97);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
  }

  #navLinks.mobile-open .nav-link {
    padding: 14px 16px;
    font-size: 16px;
  }

  .hero { padding-top: 60px; }
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 16px; }
  .hero-ctas { flex-direction: column; align-items: center; }

  .chat-bubble-1 { right: 0; max-width: 200px; }
  .chat-bubble-2 { left: 0; max-width: 200px; }
  .progress-card { left: 0; min-width: 180px; }

  .step-number { font-size: 40px; }

  .feature-highlight { flex-direction: column; }
  .highlight-content { flex-direction: column; text-align: center; }

  .footer-links-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom { flex-direction: column; text-align: center; }

  .hide-mobile { display: none; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .brain-container { max-width: 300px; }
  .chat-bubble { display: none; }
  .progress-card { display: none; }
  .stats-grid { gap: 12px; }
  .footer-links-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}