/* ============================================
   VAG VDR – Digital Intelligence Engineering
   Stylesheet v1.0
   ============================================ */

:root {
  --navy: #0B1426;
  --navy-light: #142038;
  --charcoal: #1A2332;
  --accent: #00C2A8;
  --accent-hover: #00A890;
  --accent-soft: rgba(0, 194, 168, 0.12);
  --text-primary: #F5F7FA;
  --text-secondary: #A0AEC0;
  --text-muted: #718096;
  --white: #FFFFFF;
  --border: rgba(255, 255, 255, 0.08);
  --card-bg: rgba(255, 255, 255, 0.03);
  --success: #00C2A8;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  --transition: all 0.25s ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

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

body {
  font-family: var(--font);
  background: var(--navy);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  list-style: none;
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--white);
}

h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.125rem; }

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.text-accent { color: var(--accent); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }

/* ========== LAYOUT ========== */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section-sm {
  padding: 3.5rem 0;
}

.section-header {
  max-width: 720px;
  margin: 0 auto 3rem;
  text-align: center;
}

.section-header h2 {
  margin-bottom: 1rem;
}

.section-header p {
  font-size: 1.125rem;
}

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1.2;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--navy);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 194, 168, 0.3);
}

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

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

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

.btn-outline:hover {
  background: var(--accent);
  color: var(--navy);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 0.55rem 1.15rem;
  font-size: 0.875rem;
}

/* ========== HEADER / NAV ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 20, 38, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--white);
  text-decoration: none;
}

.logo-mark {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--navy);
}

.logo span {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 0.9rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav a {
  color: var(--text-secondary);
  font-size: 0.925rem;
  font-weight: 500;
}

.nav a:hover,
.nav a.active {
  color: var(--white);
}

.nav-cta {
  margin-left: 0.5rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

/* ========== HERO ========== */
.hero {
  padding: 10rem 0 6rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 194, 168, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: var(--accent-soft);
  border: 1px solid rgba(0, 194, 168, 0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero h1 {
  margin-bottom: 1.25rem;
}

.hero h1 .highlight {
  color: var(--accent);
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.hero-meta-item strong {
  font-size: 0.95rem;
  color: var(--white);
}

.hero-meta-item span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ========== FEATURE CARDS ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: var(--transition);
}

.feature-card:hover {
  border-color: rgba(0, 194, 168, 0.3);
  background: rgba(0, 194, 168, 0.04);
}

.feature-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-soft);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.25rem;
  color: var(--accent);
}

.feature-card h3 {
  margin-bottom: 0.6rem;
}

.feature-card p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ========== COMPARISON ========== */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2rem;
  font-size: 0.95rem;
}

.comparison-table th,
.comparison-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.comparison-table th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.comparison-table td {
  color: var(--text-secondary);
}

.comparison-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.comparison-table .check {
  color: var(--accent);
  font-weight: 600;
}

.comparison-table .cross {
  color: var(--text-muted);
}

/* ========== PRICING ========== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card.featured {
  border-color: var(--accent);
  background: rgba(0, 194, 168, 0.05);
}

.pricing-card.featured::before {
  content: 'Recommended';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--navy);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.9rem;
  border-radius: 100px;
}

.pricing-card h3 {
  margin-bottom: 0.35rem;
}

.pricing-card .price {
  font-size: 2rem;
  font-weight: 600;
  color: var(--white);
  margin: 1rem 0 0.25rem;
}

.pricing-card .price span {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-card .desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.pricing-features {
  flex: 1;
  margin-bottom: 1.75rem;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.45rem 0;
  font-size: 0.925rem;
  color: var(--text-secondary);
}

.pricing-features li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
}

/* ========== CTA SECTION ========== */
.cta-section {
  background: linear-gradient(135deg, var(--navy-light) 0%, var(--charcoal) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.cta-box {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-box h2 {
  margin-bottom: 1rem;
}

.cta-box p {
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ========== FORMS ========== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--white);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.form-group select {
  background-color: #142038;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%00C2A8' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
  color: #F5F7FA;
}

.form-group select option {
  background-color: #142038;
  color: #F5F7FA;
  padding: 0.75rem;
}

.form-group select option:checked,
.form-group select option:hover {
  background-color: #00C2A8;
  color: #0B1426;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(0, 194, 168, 0.08);
  box-shadow: 0 0 0 3px rgba(0, 194, 168, 0.15);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #718096;
}

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

/* ========== FOOTER ========== */
.footer {
  background: var(--navy);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 280px;
}

.footer h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.footer-links a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.925rem;
  padding: 0.3rem 0;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========== PAGE HEADER ========== */
.page-header {
  padding: 9rem 0 4rem;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  margin-bottom: 1rem;
}

.page-header p {
  font-size: 1.15rem;
  max-width: 600px;
}

/* ========== CONTENT BLOCKS ========== */
.content-block {
  margin-bottom: 3rem;
}

.content-block h2 {
  margin-bottom: 1rem;
}

.content-block h3 {
  margin: 1.75rem 0 0.75rem;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.list-check li {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.5rem 0;
  color: var(--text-secondary);
}

.list-check li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
}

/* ========== SECURITY BADGES ========== */
.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.security-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.security-item h4 {
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.security-item p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .two-col {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2.1rem; }
  h2 { font-size: 1.65rem; }
  
  .nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11, 20, 38, 0.98);
    flex-direction: column;
    align-items: stretch;
    padding: 2rem 1.5rem;
    gap: 0;
    z-index: 999;
  }

  .nav.nav-open {
    display: flex;
  }

  .nav a {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 1.05rem;
  }

  .nav .nav-cta {
    margin: 1.5rem 0 0;
    text-align: center;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero {
    padding: 8rem 0 4rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== UTILITIES ========== */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.badge {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 100px;
  background: var(--accent-soft);
  color: var(--accent);
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 2.5rem 0;
}