/* =========================================
   AiReply – Main Stylesheet
   ========================================= */

/* 1. Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* 2. CSS Variables */
:root {
  --bg: #0b1020;
  --bg-2: #0f172a;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(109,94,248,0.4);
  --primary: #6d5ef8;
  --primary-2: #4f8cff;
  --primary-glow: rgba(109,94,248,0.25);
  --emerald: #10d98c;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --radius: 18px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* 3. Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* 4. Scroll Progress Bar */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
  z-index: 9999;
  transition: width 0.1s linear;
}

/* 5. Navigation */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  background: rgba(11,16,32,0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

nav.scrolled {
  background: rgba(11,16,32,0.95);
  box-shadow: 0 4px 30px rgba(0,0,0,0.4);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.nav-logo .logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.nav-links {
  display: flex;
  gap: 34px;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--primary);
  transition: var(--transition);
  border-radius: 2px;
}

.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

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

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

.hamburger span {
  display: block;
  height: 2px;
  width: 24px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* 6. Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  color: #fff;
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--primary-glow);
}

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

.btn-outline:hover {
  background: var(--bg-card);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
  border-radius: 50px;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 10px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
  border-radius: 50px;
}

.btn-ghost:hover { color: var(--text); }

/* 7. Layout Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(109,94,248,0.1);
  border: 1px solid rgba(109,94,248,0.2);
  padding: 6px 14px;
  border-radius: 50px;
  margin-bottom: 18px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.7;
}

.text-center { text-align: center; }
.text-center .section-subtitle { margin: 0 auto; }

.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 8. Background Blobs */
.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.12;
  pointer-events: none;
}

/* 9. Hero Section */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 68px;
  overflow: hidden;
}

.hero-blob-1 {
  width: 600px; height: 600px;
  background: var(--primary);
  top: -200px; right: -100px;
}

.hero-blob-2 {
  width: 400px; height: 400px;
  background: var(--primary-2);
  bottom: -100px; left: -100px;
}

.hero-blob-3 {
  width: 300px; height: 300px;
  background: var(--emerald);
  top: 50%; right: 30%;
  opacity: 0.06;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16,217,140,0.1);
  border: 1px solid rgba(16,217,140,0.25);
  color: var(--emerald);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 24px;
  animation: pulse-badge 2.5s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16,217,140,0.3); }
  50% { box-shadow: 0 0 0 8px rgba(16,217,140,0); }
}

.hero-title {
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.75;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  gap: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

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

.hero-stat .num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}

.hero-stat .label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Hero Visual */
.hero-visual {
  position: relative;
}

.hero-dashboard {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 30px 100px rgba(0,0,0,0.6), 0 0 0 1px var(--border);
  position: relative;
  z-index: 2;
}

.hero-dashboard img {
  width: 100%;
  border-radius: 20px;
}

/* Floating badges on hero visual */
.float-badge {
  position: absolute;
  background: rgba(15,23,42,0.9);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  z-index: 5;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  animation: float 3s ease-in-out infinite;
}

.float-badge:nth-child(2) { animation-delay: 0.5s; }
.float-badge:nth-child(3) { animation-delay: 1s; }
.float-badge:nth-child(4) { animation-delay: 1.5s; }

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

.float-badge .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.float-badge-1 { top: 10%; left: -60px; }
.float-badge-2 { top: 40%; right: -60px; }
.float-badge-3 { bottom: 25%; left: -50px; }
.float-badge-4 { bottom: 8%; right: -40px; }

/* 10. Stats Strip */
#stats-strip {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item .stat-num {
  font-size: 2rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

/* 11. Benefits / Value Cards */
#benefits {
  position: relative;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.benefit-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(109,94,248,0.05), transparent);
  opacity: 0;
  transition: var(--transition);
}

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

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

.benefit-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
}

.benefit-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

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

/* 12. Demo Tabs */
#demo {
  position: relative;
  background: var(--bg-2);
}

.demo-tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 40px 0 32px;
}

.demo-tab {
  padding: 9px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.demo-tab:hover { color: var(--text); border-color: var(--border-hover); }

.demo-tab.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border-color: transparent;
}

.demo-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: none;
  animation: fadeIn 0.4s ease;
}

.demo-content.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.demo-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.demo-info {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.demo-info h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.demo-info p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.demo-features-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.demo-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.87rem;
  color: var(--text-muted);
}

.demo-feature-item .check {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: rgba(109,94,248,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.6rem;
  color: var(--primary);
}

.demo-visual {
  background: rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 340px;
  padding: 32px;
  border-left: 1px solid var(--border);
}

/* Chat Mockup */
.chat-mockup {
  background: #1a2332;
  border-radius: 16px;
  padding: 16px;
  width: 100%;
  max-width: 320px;
  box-shadow: var(--shadow-lg);
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  margin-bottom: 12px;
}

.chat-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.chat-name { font-size: 0.85rem; font-weight: 600; }
.chat-status { font-size: 0.72rem; color: var(--emerald); margin-top: 1px; }

.chat-messages { display: flex; flex-direction: column; gap: 8px; }

.msg {
  padding: 8px 12px;
  border-radius: 12px;
  font-size: 0.78rem;
  line-height: 1.4;
  max-width: 80%;
}

.msg-in {
  background: rgba(255,255,255,0.07);
  color: var(--text-muted);
  align-self: flex-start;
  border-radius: 4px 12px 12px 12px;
}

.msg-out {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  align-self: flex-end;
  border-radius: 12px 12px 4px 12px;
}

.msg-ai {
  background: rgba(16,217,140,0.12);
  border: 1px solid rgba(16,217,140,0.2);
  color: var(--emerald);
  align-self: flex-end;
  border-radius: 12px 12px 4px 12px;
  font-size: 0.73rem;
}

.ai-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.7;
  margin-bottom: 3px;
}

/* Team Inbox Mockup */
.inbox-mockup {
  background: #1a2332;
  border-radius: 16px;
  padding: 16px;
  width: 100%;
  max-width: 340px;
  box-shadow: var(--shadow-lg);
}

.inbox-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.inbox-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border-radius: 10px;
  margin-bottom: 6px;
  background: rgba(255,255,255,0.04);
  transition: var(--transition);
}

.inbox-item:hover { background: rgba(255,255,255,0.07); }

.inbox-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
}

.inbox-detail { flex: 1; min-width: 0; }
.inbox-name { font-size: 0.78rem; font-weight: 600; }
.inbox-preview {
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.inbox-badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 50px;
}

/* KB Mockup */
.kb-mockup {
  background: #1a2332;
  border-radius: 16px;
  padding: 16px;
  width: 100%;
  max-width: 340px;
  box-shadow: var(--shadow-lg);
}

.kb-search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.07);
  border-radius: 10px;
  padding: 9px 12px;
  margin-bottom: 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.kb-result {
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 8px;
}

.kb-file {
  font-size: 0.72rem;
  color: var(--primary);
  margin-bottom: 4px;
  font-weight: 600;
}

.kb-excerpt {
  font-size: 0.73rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.kb-highlight { background: rgba(109,94,248,0.2); border-radius: 3px; padding: 0 2px; color: var(--text); }

/* Campaign Mockup */
.campaign-mockup {
  background: #1a2332;
  border-radius: 16px;
  padding: 16px;
  width: 100%;
  max-width: 340px;
  box-shadow: var(--shadow-lg);
}

.campaign-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.campaign-label { font-size: 0.78rem; color: var(--text-muted); }
.campaign-value { font-size: 0.85rem; font-weight: 700; }

.progress-bar {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 6px;
}

.progress-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
}

/* 13. How It Works */
#how-it-works { position: relative; }

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 56px;
  position: relative;
}

.steps-grid::before {
  content: '';
  position: absolute;
  top: 38px;
  left: calc(16.66% + 20px);
  right: calc(16.66% + 20px);
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
  opacity: 0.25;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  position: relative;
  transition: var(--transition);
  text-align: center;
}

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

.step-number {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 900;
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 30px var(--primary-glow);
}

.step-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 0.87rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 14. Feature Groups */
#features { position: relative; background: var(--bg-2); }

.feature-groups { display: flex; flex-direction: column; gap: 80px; margin-top: 56px; }

.feature-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-group.reverse { direction: rtl; }
.feature-group.reverse > * { direction: ltr; }

.feature-group-info {}

.feature-group-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 50px;
  margin-bottom: 16px;
}

.feature-group-tag.purple { color: var(--primary); background: rgba(109,94,248,0.1); }
.feature-group-tag.blue { color: var(--primary-2); background: rgba(79,140,255,0.1); }
.feature-group-tag.green { color: var(--emerald); background: rgba(16,217,140,0.1); }
.feature-group-tag.orange { color: #f59e0b; background: rgba(245,158,11,0.1); }

.feature-group-info h3 {
  font-size: 1.7rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.25;
}

.feature-group-info p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.feature-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.feature-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

.feature-pill-icon { font-size: 0.9rem; }

.feature-group-visual {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 280px;
  justify-content: center;
}

.feature-item-row {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px;
  background: rgba(255,255,255,0.03);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.04);
  transition: var(--transition);
}

.feature-item-row:hover { background: rgba(255,255,255,0.06); }

.fi-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.fi-text h4 { font-size: 0.88rem; font-weight: 700; margin-bottom: 3px; }
.fi-text p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.4; }

/* 15. Before/After & Comparison */
#comparison {
  position: relative;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 48px;
}

.comparison-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.comparison-col.after {
  border-color: rgba(109,94,248,0.3);
  background: rgba(109,94,248,0.04);
}

.comparison-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.comparison-badge {
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
}

.comparison-badge.before { background: rgba(239,68,68,0.1); color: #f87171; }
.comparison-badge.after { background: rgba(16,217,140,0.1); color: var(--emerald); }

.comparison-header h4 { font-size: 1rem; font-weight: 700; }

.comparison-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.88rem;
}

.comparison-item .icon { flex-shrink: 0; margin-top: 1px; }
.comparison-item p { color: var(--text-muted); line-height: 1.45; }
.comparison-col.after .comparison-item p { color: var(--text); }

/* 16. Use Cases */
#use-cases { position: relative; }

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.use-case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  cursor: default;
}

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

.use-case-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.use-case-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.use-case-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 17. Why Choose */
#why-us { position: relative; background: var(--bg-2); }

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  transition: var(--transition);
}

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

.why-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.why-card h3 {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.why-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* 18. FAQ */
#faq { position: relative; }

.faq-list {
  max-width: 720px;
  margin: 48px auto 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

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

.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  user-select: none;
}

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

.faq-icon {
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: var(--transition);
}

.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--primary); border-color: transparent; }

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4,0,0.2,1), padding 0.35s ease;
  padding: 0 22px;
}

.faq-item.open .faq-a {
  max-height: 300px;
  padding: 0 22px 20px;
}

.faq-a p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 19. Final CTA */
#cta {
  position: relative;
  overflow: hidden;
}

.cta-inner {
  background: linear-gradient(135deg, rgba(109,94,248,0.2) 0%, rgba(79,140,255,0.15) 100%);
  border: 1px solid rgba(109,94,248,0.3);
  border-radius: 28px;
  padding: 80px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: var(--primary);
  filter: blur(120px);
  opacity: 0.15;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.cta-inner h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
}

.cta-inner p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 20. Footer */
footer {
  padding: 60px 0 32px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 14px;
  max-width: 260px;
  line-height: 1.65;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text);
  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(--primary); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* 21. Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 22. Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 68px; left: 0; right: 0;
  background: rgba(11,16,32,0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 24px;
  z-index: 999;
  flex-direction: column;
  gap: 16px;
}

.mobile-menu.open { display: flex; }

.mobile-menu a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.mobile-menu a:hover { color: var(--primary); }
.mobile-menu .btn { width: 100%; justify-content: center; }

/* 23. Responsive */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { order: -1; max-width: 600px; margin: 0 auto; }
  .float-badge-1, .float-badge-3 { left: -20px; }
  .float-badge-2, .float-badge-4 { right: -20px; }
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-group { grid-template-columns: 1fr; gap: 32px; }
  .feature-group.reverse { direction: ltr; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .benefits-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .steps-grid::before { display: none; }
  .demo-panel { grid-template-columns: 1fr; }
  .demo-visual { display: none; }
  .use-cases-grid { grid-template-columns: repeat(2, 1fr); }
  .comparison-grid { grid-template-columns: 1fr; }
  .demo-tabs { gap: 6px; }
  .demo-tab { font-size: 0.8rem; padding: 7px 14px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .cta-inner { padding: 48px 24px; }
  .float-badge { display: none; }
  section { padding: 64px 0; }
}

@media (max-width: 480px) {
  .use-cases-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}