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

:root {
  --primary: #3B82F6;
  --primary-dark: #2563EB;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-muted: #f1f5f9;
  --text: #0f172a;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000; padding: 0 40px;
  height: 64px; display: flex;
  align-items: center; justify-content: space-between;
}

.nav-brand {
  font-size: 20px; font-weight: 700;
  color: var(--primary); display: flex;
  align-items: center; gap: 10px;
  text-decoration: none;
}

.nav-brand svg { width: 28px; height: 28px; fill: var(--primary); }

.nav-links { display: flex; gap: 32px; list-style: none; }

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none; font-size: 14px;
  font-weight: 500; transition: color 0.15s;
}

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

.nav-cta {
  padding: 8px 20px; border-radius: 8px;
  background: var(--primary); color: #fff !important;
  font-weight: 600;
}

.nav-cta:hover { background: var(--primary-dark); }

/* Hero */
.hero {
  padding: 140px 40px 80px;
  text-align: center;
  background: linear-gradient(180deg, #eff6ff 0%, #fff 100%);
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px; border-radius: 20px;
  background: #dbeafe; color: var(--primary);
  font-size: 13px; font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 56px; font-weight: 800;
  line-height: 1.1; max-width: 760px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, #1e293b 0%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 20px; color: var(--text-secondary);
  max-width: 580px; margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-actions { display: flex; gap: 12px; justify-content: center; }

.btn-primary {
  padding: 14px 32px; border-radius: 10px;
  background: var(--primary); color: #fff;
  font-size: 16px; font-weight: 600;
  border: none; cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }

.btn-secondary {
  padding: 14px 32px; border-radius: 10px;
  background: var(--bg); color: var(--text);
  font-size: 16px; font-weight: 600;
  border: 1px solid var(--border);
  cursor: pointer; transition: all 0.2s;
  text-decoration: none;
}

.btn-secondary:hover { background: var(--bg-muted); }

/* Sections */
.section {
  padding: 80px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center; margin-bottom: 56px;
}

.section-header h2 {
  font-size: 36px; font-weight: 700; margin-bottom: 12px;
}

.section-header p {
  font-size: 18px; color: var(--text-secondary);
  max-width: 540px; margin: 0 auto;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  transition: box-shadow 0.2s, transform 0.2s;
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: #dbeafe;
  display: flex; align-items: center;
  justify-content: center; margin-bottom: 16px;
}

.feature-icon svg { width: 24px; height: 24px; fill: var(--primary); }

.feature-card h3 {
  font-size: 18px; font-weight: 600; margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px; color: var(--text-secondary); line-height: 1.6;
}

/* Customizer */
.customizer-section {
  background: var(--bg-soft);
  border-radius: 16px;
  padding: 48px;
  border: 1px solid var(--border);
}

.customizer-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.customizer-form { display: flex; flex-direction: column; gap: 16px; }

.form-group { display: flex; flex-direction: column; gap: 4px; }

.form-group label {
  font-size: 13px; font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.5px;
}

.form-group input[type="text"],
.form-group input[type="color"],
.form-group select,
.form-group textarea {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px;
  font-family: inherit; outline: none;
  transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
}

.form-group input[type="color"] {
  width: 48px; height: 40px; padding: 4px;
  cursor: pointer;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.toggle-group {
  display: flex; align-items: center;
  justify-content: space-between;
}

.toggle-group input[type="checkbox"] {
  width: 18px; height: 18px; accent-color: var(--primary);
}

.customizer-preview {
  background: var(--bg-muted);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  min-height: 480px;
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 12px;
  color: var(--text-secondary);
  font-size: 14px;
  position: relative;
  overflow: hidden;
  padding: 24px;
}

/* Live Mini-Preview Widget */
.preview-widget {
  width: 280px;
  border-radius: var(--preview-radius, 16px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.12);
  overflow: hidden;
  font-family: var(--preview-font, 'Inter', sans-serif);
  transition: border-radius 0.2s ease;
}
.preview-header {
  background: var(--preview-primary, #3B82F6);
  color: var(--preview-header-text, #FFFFFF);
  padding: 14px 16px;
  display: flex; align-items: center; gap: 10px;
  border-radius: var(--preview-radius, 16px) var(--preview-radius, 16px) 0 0;
  transition: background 0.2s ease, border-radius 0.2s ease;
}
.preview-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; overflow: hidden;
}
.preview-avatar svg { width: 18px; height: 18px; fill: var(--preview-header-text, #fff); }
.preview-avatar img { width: 100%; height: 100%; object-fit: cover; }
.preview-header-info { flex: 1; }
.preview-header-name {
  font-size: 13px; font-weight: 600;
  color: var(--preview-header-text, #fff);
}
.preview-header-status {
  font-size: 10px; opacity: 0.85;
  display: flex; align-items: center; gap: 4px;
  color: var(--preview-header-text, #fff);
}
.preview-status-dot {
  width: 6px; height: 6px; border-radius: 50%; background: #4ade80;
  display: inline-block;
}

.preview-messages {
  background: var(--preview-chat-bg, #F9FAFB);
  padding: 12px; display: flex;
  flex-direction: column; gap: 6px;
  min-height: 160px;
  transition: background 0.2s ease;
}
.preview-msg {
  max-width: 85%; padding: 8px 12px;
  border-radius: 12px; font-size: 11px;
  line-height: 1.5; word-wrap: break-word;
}
.preview-msg-bot {
  background: var(--preview-bot-bubble, #FFFFFF);
  color: var(--preview-bot-text, #1F2937);
  border: 1px solid #e5e7eb;
  border-bottom-left-radius: 4px;
  align-self: flex-start;
  transition: background 0.2s ease, color 0.2s ease;
}
.preview-msg-user {
  background: var(--preview-primary, #3B82F6);
  color: var(--preview-user-text, #FFFFFF);
  border-bottom-right-radius: 4px;
  align-self: flex-end;
  transition: background 0.2s ease, color 0.2s ease;
}

.preview-input-area {
  padding: 10px 12px;
  border-top: 1px solid #e5e7eb;
  display: flex; align-items: center; gap: 6px;
  background: #fff;
  transition: background 0.2s ease;
}
.preview-input {
  flex: 1; border: 1px solid #e5e7eb;
  border-radius: 20px; padding: 7px 12px;
  font-size: 11px; color: #9ca3af;
}
.preview-send-btn {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--preview-primary, #3B82F6);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s ease;
}
.preview-send-btn svg { width: 14px; height: 14px; fill: #fff; }
.preview-powered {
  text-align: center; padding: 4px;
  font-size: 9px; color: #9ca3af;
  background: #fff;
  border-top: 1px solid #f3f4f6;
  border-radius: 0 0 var(--preview-radius, 16px) var(--preview-radius, 16px);
  transition: border-radius 0.2s ease;
}
.preview-launcher {
  width: var(--preview-launcher-size, 48px);
  height: var(--preview-launcher-size, 48px);
  border-radius: 50%;
  background: var(--preview-primary, #3B82F6);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.16);
  transition: background 0.2s ease, width 0.2s ease, height 0.2s ease;
  margin-top: 8px;
}
.preview-launcher svg { width: 22px; height: 22px; fill: #fff; }

/* Theme Preset Row */
.theme-preset-row {
  display: flex; gap: 8px; flex-wrap: wrap;
}
.theme-preset-btn {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 8px 12px; border-radius: 10px;
  border: 2px solid var(--border); background: var(--bg);
  cursor: pointer; font-size: 11px; font-weight: 600;
  color: var(--text-secondary); transition: all 0.15s;
  min-width: 68px;
}
.theme-preset-btn:hover { border-color: var(--primary); color: var(--text); }
.theme-preset-btn.active {
  border-color: var(--primary); background: #eff6ff;
  color: var(--primary);
}
.theme-swatch {
  width: 32px; height: 20px; border-radius: 6px;
  display: block;
}

/* Color Grid */
.color-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
}
.color-cell {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.color-cell input[type="color"] {
  width: 40px; height: 32px; padding: 2px;
  border: 1px solid var(--border); border-radius: 6px;
  cursor: pointer; background: var(--bg);
}
.color-cell span {
  font-size: 10px; font-weight: 600; color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.3px;
}

/* Range Sliders */
.form-group input[type="range"] {
  width: 100%; accent-color: var(--primary);
  height: 6px; border-radius: 3px;
  cursor: pointer;
}

/* Embed Code */
.embed-section { margin-top: 40px; }

.code-block {
  background: #1e293b;
  color: #e2e8f0;
  border-radius: var(--radius);
  padding: 24px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
  position: relative;
  white-space: pre-wrap;
  word-break: break-all;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.code-header h3 { font-size: 18px; font-weight: 600; }

.copy-btn {
  padding: 8px 20px; border-radius: 8px;
  background: var(--primary); color: #fff;
  font-size: 13px; font-weight: 600;
  border: none; cursor: pointer;
  transition: opacity 0.15s;
}

.copy-btn:hover { opacity: 0.9; }

/* Feature Tabs */
.feature-tabs {
  display: flex; gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 32px;
}

.feature-tab {
  padding: 12px 24px;
  font-size: 14px; font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer; background: none;
  border: none; border-bottom: 2px solid transparent;
  margin-bottom: -2px; transition: all 0.15s;
}

.feature-tab:hover { color: var(--text); }
.feature-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.feature-content { display: none; }
.feature-content.active { display: block; }

.code-tab-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.code-tab-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 48px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: 40px 0;
}

.stat { text-align: center; }
.stat-value {
  font-size: 40px; font-weight: 800;
  color: var(--primary);
}
.stat-label {
  font-size: 14px; color: var(--text-secondary);
  margin-top: 4px;
}

/* CTA Banner */
.cta-banner {
  text-align: center;
  padding: 80px 40px;
  background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
  color: #fff;
  border-radius: 20px;
  margin: 40px;
}

.cta-banner h2 { font-size: 36px; font-weight: 700; margin-bottom: 12px; }
.cta-banner p { font-size: 18px; opacity: 0.85; margin-bottom: 32px; }

.btn-white {
  padding: 14px 32px; border-radius: 10px;
  background: #fff; color: var(--primary);
  font-size: 16px; font-weight: 600;
  border: none; cursor: pointer;
  transition: all 0.2s;
}

.btn-white:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(0,0,0,0.2); }

/* Footer */
.footer {
  padding: 40px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 36px; }
  .hero { padding: 120px 20px 60px; }
  .section { padding: 60px 20px; }
  .customizer-layout { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .cta-banner { margin: 20px; padding: 60px 20px; }
}