/* ================================================
   DRIV DIGITAL — Shared Stylesheet
   Dark OLED + Nordic Minimalism Design System
   ================================================ */

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

/* ---- CSS Variables ---- */
:root {
  --bg-primary:   #08080F;
  --bg-secondary: #0C0C1A;
  --bg-card:      #101020;
  --bg-card-hover:#141428;
  --bg-elevated:  #0E0E20;

  --accent:        #2563FF;
  --accent-hover:  #4A7FFF;
  --accent-glow:   rgba(37, 99, 255, 0.18);
  --accent-subtle: rgba(37, 99, 255, 0.08);
  --accent-border: rgba(37, 99, 255, 0.28);

  --nordic-white: #E8F2FF;
  --text-primary: #F0F6FF;
  --text-secondary: #7A8BAD;
  --text-muted:   #3A4466;

  --border:       rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.10);

  --radius:    12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --nav-height: 72px;

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

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; }
input, textarea, select { font-family: inherit; }

h1, h2, h3, h4, h5, h6 {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

p { line-height: 1.7; }

/* ============================================
   LAYOUT
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 120px 0; }

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

.nav.scrolled {
  background: rgba(8, 8, 15, 0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.nav-logo {
  font-family: 'Poppins', sans-serif;
  font-weight: 900;
  font-size: 1.6rem;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  cursor: pointer;
  flex-shrink: 0;
  transition: opacity var(--transition);
}

.nav-logo:hover { opacity: 0.85; }

.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  flex: 1;
  justify-content: center;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--bg-primary);
  padding: calc(var(--nav-height) + 32px) 32px 40px;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border);
}

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

.mobile-menu a {
  font-family: 'Poppins', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-secondary);
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
  letter-spacing: -0.02em;
  cursor: pointer;
}

.mobile-menu a:hover { color: var(--text-primary); }
.mobile-menu .btn { margin-top: 32px; }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn svg { flex-shrink: 0; transition: transform var(--transition); }
.btn:hover svg { transform: translateX(3px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-light);
}
.btn-outline:hover {
  border-color: var(--accent-border);
  color: var(--accent);
  background: var(--accent-subtle);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border-color: transparent;
  padding-left: 0; padding-right: 0;
}
.btn-ghost:hover { gap: 12px; }
.btn-ghost svg { transition: transform var(--transition); }

.btn-lg {
  padding: 16px 40px;
  font-size: 1rem;
  border-radius: 12px;
}

/* ============================================
   TYPOGRAPHY HELPERS
   ============================================ */
.gradient-text {
  background: linear-gradient(125deg, #fff 0%, #6EA8FF 40%, #2563FF 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--accent-border);
  background: var(--accent-subtle);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.75;
}

.section-header { margin-bottom: 64px; }
.section-header.center { text-align: center; }
.section-header.center .section-subtitle { margin: 0 auto; }
.section-header.center .section-tag { margin-bottom: 24px; }

.divider {
  width: 48px; height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin: 24px 0;
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.card:hover {
  border-color: var(--accent-border);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px var(--accent-border);
}

/* ============================================
   ICON BOX
   ============================================ */
.icon-box {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

/* ============================================
   STATS
   ============================================ */
.stat-number {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text-primary);
}

.stat-number .accent { color: var(--accent); }

/* ============================================
   BACKGROUND EFFECTS
   ============================================ */
.bg-dot-grid {
  position: relative;
}
.bg-dot-grid::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.035) 1px, transparent 0);
  background-size: 36px 36px;
  pointer-events: none;
  z-index: 0;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  background: var(--accent);
  filter: blur(130px);
  opacity: 0.10;
  pointer-events: none;
}

/* ============================================
   PAGE HERO (inner pages)
   ============================================ */
.page-hero {
  padding: calc(var(--nav-height) + 80px) 0 100px;
  position: relative;
  overflow: hidden;
}

.page-hero .container { position: relative; z-index: 1; }

.page-hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.page-hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 580px;
  line-height: 1.75;
}

/* ============================================
   ANIMATIONS
   ============================================ */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

@media (prefers-reduced-motion: reduce) {
  .animate-in { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand .nav-logo { font-size: 1.4rem; }

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.75;
  margin-top: 16px;
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.footer-social a {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: pointer;
}

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

.footer-col h4 {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  cursor: pointer;
}

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

.footer-bottom {
  padding-top: 40px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 14px 18px;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.form-group select option {
  background: var(--bg-card);
  color: var(--text-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  section { padding: 96px 0; }
}

@media (max-width: 768px) {
  section { padding: 72px 0; }
  .nav-links, .nav-actions .btn-outline { display: none; }
  .nav-toggle { display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section-title { font-size: clamp(1.75rem, 6vw, 2.5rem); }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .btn-lg { padding: 14px 28px; }
}