/* ===== CSS Variables ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --secondary: #64748b;
  --accent: #7dd3fc;
  --bg-dark: #0f172a;
  --bg-darker: #020617;
  --bg-card: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border: #334155;
  --success: #10b981;
  --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
}

/* ===== Reset & Base Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg-darker);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  padding: 16px 0;
}

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

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

.logo-icon {
  font-size: 28px;
}

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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s;
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
  padding: 20px;
  flex-direction: column;
  gap: 16px;
  z-index: 999;
}

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

.mobile-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: 12px;
  border-radius: 8px;
  transition: all 0.2s;
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

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

.btn-large {
  padding: 16px 32px;
  font-size: 16px;
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* ===== Hero Section ===== */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 150%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

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

.hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.highlight {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.stat {
  text-align: left;
}

.stat-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary-light);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== Extension Preview ===== */
.extension-preview {
  position: relative;
}

.preview-window {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s;
}

.preview-window:hover {
  transform: translateY(-8px);
}

.preview-header {
  background: var(--bg-darker);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border);
}

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

.preview-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border);
}

.preview-dots span:nth-child(1) { background: #ef4444; }
.preview-dots span:nth-child(2) { background: #f59e0b; }
.preview-dots span:nth-child(3) { background: #10b981; }

.preview-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--text-secondary);
}

.preview-content {
  padding: 24px;
}

.preview-select {
  margin-bottom: 16px;
}

.preview-select label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.preview-dropdown {
  background: var(--bg-darker);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text-primary);
}

.preview-input {
  width: 100%;
  min-height: 80px;
  background: var(--bg-darker);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  resize: none;
  margin-bottom: 12px;
}

.preview-btn {
  width: 100%;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  margin-bottom: 16px;
}

.preview-result {
  background: var(--bg-darker);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.preview-verse {
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 12px;
  color: var(--text-primary);
  font-style: italic;
}

.preview-ref {
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== Sections ===== */
section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-title {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-description {
  font-size: 18px;
  color: var(--text-secondary);
}

/* ===== Features ===== */
.features {
  background: var(--bg-dark);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: 0 20px 40px rgba(37, 99, 235, 0.2);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-description {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Versions ===== */
.versions {
  background: var(--bg-darker);
}

.versions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.version-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: all 0.3s;
  position: relative;
}

.version-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-light);
}

.version-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--primary);
  color: white;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 4px;
}

.version-name {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-light);
  margin-bottom: 4px;
}

.version-full {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.version-year {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.version-description {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===== How It Works ===== */
.how-it-works {
  background: var(--bg-dark);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 48px;
  margin-bottom: 60px;
}

.step {
  text-align: center;
}

.step-number {
  width: 64px;
  height: 64px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 800;
  margin: 0 auto 24px;
}

.step-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.step-description {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.how-examples {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  text-align: center;
}

.examples-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.examples-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.example-tag {
  background: var(--bg-darker);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 14px;
  transition: all 0.2s;
  cursor: default;
}

.example-tag:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* ===== Install Section ===== */
.install {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  text-align: center;
}

.install-title {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 16px;
  color: white;
}

.install-description {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 32px;
}

.install-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.install .btn-primary {
  background: white;
  color: var(--primary);
}

.install .btn-primary:hover {
  background: var(--text-secondary);
}

.install .btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.3);
}

.install .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

.install-note {
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
}

/* ===== Support Section ===== */
.support {
  background: var(--bg-darker);
}

.support-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.support-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}

.support-description {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

.support-list {
  list-style: none;
  margin-bottom: 32px;
}

.support-list li {
  padding: 8px 0;
  font-size: 16px;
  color: var(--text-secondary);
}

.support-alternatives h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
}

.support-options {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.support-option {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  transition: all 0.2s;
}

.support-option:hover {
  border-color: var(--primary);
  transform: translateX(4px);
}

.support-option-icon {
  font-size: 32px;
}

.support-option-text h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

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

/* ===== FAQ ===== */
.faq {
  background: var(--bg-dark);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 16px;
  transition: all 0.2s;
}

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

.faq-question {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.faq-answer {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-description {
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.footer-social a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.footer-heading {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s;
}

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

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.footer-note {
  margin-top: 8px;
  font-size: 13px;
}

/* ===== Responsive Design ===== */
@media (max-width: 968px) {
  .nav-links {
    display: none;
  }

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

  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-title {
    font-size: 42px;
  }

  .hero-description {
    font-size: 18px;
  }

  .support-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

@media (max-width: 640px) {
  .hero {
    padding: 100px 0 60px;
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-description {
    font-size: 16px;
  }

  .hero-buttons {
    flex-direction: column;
  }

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

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .section-title {
    font-size: 32px;
  }

  .section-description {
    font-size: 16px;
  }

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

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

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

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

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