:root {
  --bg: #0b0f14;
  --bg-alt: #111827;
  --card: #161d27;
  --text: #f5f7fa;
  --muted: #a9b3c1;
  --accent: #00c2ff;
  --accent-2: #ff8a00;
  --border: rgba(255,255,255,0.08);
  --max-width: 1200px;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(0,0,0,0.25);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
  border-radius: 12px;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
}

section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.section-text {
  color: var(--muted);
  max-width: 700px;
  margin-bottom: 2rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card h3 {
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--muted);
}

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 15, 20, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 72px;
  gap: 1rem;
}

.logo {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  transition: 0.3s;
}

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

.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  background:
    linear-gradient(rgba(11,15,20,0.75), rgba(11,15,20,0.9)),
    radial-gradient(circle at top right, rgba(0,194,255,0.2), transparent 30%);
}

.hero-content {
  max-width: 760px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero p {
  color: var(--muted);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-block;
  padding: 0.9rem 1.3rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  transition: 0.3s;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #001018;
  font-weight: bold;
}

.btn-secondary {
  color: var(--text);
  background: transparent;
}

.btn:hover {
  transform: translateY(-2px);
}

.feature-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.feature-card {
  padding: 1.25rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}

.feature-card h3 {
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.feature-card p {
  color: var(--muted);
  font-size: 0.95rem;
}

.about {
  background: #f8f8f8;
  color: #111;
}

.about .section-text,
.about .card p {
  color: #555;
}

.about .card {
  background: white;
  border: 1px solid #e7e7e7;
  box-shadow: none;
}

.about-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 2rem;
  align-items: start;
}

.portrait {
  background: #ddd;
  min-height: 380px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #666;
  font-weight: bold;
}

.page-hero {
  padding: 7rem 0 4rem;
  background:
    linear-gradient(rgba(11,15,20,0.8), rgba(11,15,20,0.95)),
    radial-gradient(circle at top right, rgba(0,194,255,0.18), transparent 30%);
}

.page-hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.8rem);
  margin-bottom: 1rem;
}

.page-hero p {
  color: var(--muted);
  max-width: 750px;
  font-size: 1.05rem;
}

.simracing-page {
  background: linear-gradient(180deg, #0a1016 0%, #0f1720 100%);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.dashboard-panel {
  background: linear-gradient(180deg, #131c27 0%, #0f1620 100%);
  border: 1px solid rgba(0, 194, 255, 0.15);
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.dashboard-panel h3 {
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.dashboard-panel p {
  color: var(--muted);
}

.dashboard-panel.large {
  grid-column: span 2;
}

.flightsim-page {
  background:
    linear-gradient(rgba(10, 18, 30, 0.96), rgba(11, 25, 40, 0.96));
}

.hybrid-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.hybrid-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(0, 194, 255, 0.18);
  border-radius: 18px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.hybrid-card h3 {
  color: #7fdcff;
  margin-bottom: 0.75rem;
}

.hybrid-card p {
  color: #b4c6d8;
}

.hybrid-card.large {
  grid-column: span 2;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.stat-box {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.2rem;
  text-align: center;
}

.stat-box strong {
  display: block;
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

footer {
  padding: 2rem 0;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 1000px) {
  .feature-cards,
  .grid-4,
  .grid-3,
  .dashboard-grid,
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-2,
  .about-layout,
  .hybrid-grid {
    grid-template-columns: 1fr;
  }

  .dashboard-panel.large,
  .hybrid-card.large {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  .feature-cards,
  .grid-4,
  .grid-3,
  .dashboard-grid,
  .stats-row {
    grid-template-columns: 1fr;
  }

  .nav {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 0;
  }

  .hero {
    min-height: auto;
    padding: 5rem 0;
  }
}