:root {
  --bg: #0b0a0e;
  --surface: #141318;
  --surface-hover: #1c1a22;
  --border: #222128;
  --border-light: #2a2832;
  --primary: #d4a84b;
  --primary-dim: #a8833a;
  --primary-glow: rgba(212, 168, 75, 0.12);
  --secondary: #4a6fa5;
  --accent: #c47b5a;
  --text: #e8ddd0;
  --text-dim: #8a8278;
  --text-dimmer: #5c554c;
  --success: #5a9e7a;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, system-ui, sans-serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1100px;
  --nav-height: 60px;
  --radius: 10px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection { background: var(--primary-glow); color: var(--primary); }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dimmer); }

a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--text); }

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

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(11, 10, 14, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  z-index: 100;
}

.nav-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo:hover { color: var(--primary); }

.nav-logo-icon {
  color: var(--primary);
  font-size: 20px;
}

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-links a {
  color: var(--text-dim);
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 6px;
  transition: all 0.2s;
}

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

.nav-links a.active {
  color: var(--primary);
  background: var(--primary-glow);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 24px;
  cursor: pointer;
  padding: 8px;
}

/* Hero */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-starburst {
  font-size: 32px;
  color: var(--primary);
  margin-bottom: 20px;
  display: block;
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.08); }
}

.hero h1 {
  font-size: clamp(40px, 8vw, 72px);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.05;
  margin-bottom: 20px;
  color: var(--text);
}

.hero h1 span { color: var(--primary); }

.hero p {
  font-size: clamp(16px, 2.5vw, 20px);
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-cta {
  display: inline-block;
  background: var(--primary);
  color: #0b0a0e;
  font-weight: 600;
  font-size: 15px;
  padding: 14px 36px;
  border-radius: 8px;
  transition: all 0.25s;
  border: none;
  cursor: pointer;
}

.hero-cta:hover {
  background: #e0b85a;
  color: #0b0a0e;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 168, 75, 0.2);
}

.hero-cta-outline {
  display: inline-block;
  color: var(--text-dim);
  font-size: 14px;
  margin-left: 16px;
  padding: 14px 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all 0.2s;
}

.hero-cta-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-dimmer);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* Section */
.section {
  padding: 80px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

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

.section-header h2 {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 500px;
  margin: 0 auto;
}

/* Project Cards */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  cursor: default;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 12px 40px rgba(212, 168, 75, 0.06);
}

.project-card-icon {
  font-size: 28px;
  margin-bottom: 16px;
  display: block;
}

.project-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.project-card p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 16px;
}

.project-card-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.project-card-link:hover {
  color: var(--text);
}

/* Philosophy / About Section on home */
.philosophy {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 24px;
  text-align: center;
}

.philosophy-content {
  max-width: 640px;
  margin: 0 auto;
}

.philosophy h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}

.philosophy p {
  color: var(--text-dim);
  font-size: 17px;
  line-height: 1.8;
}

.philosophy .ornament {
  color: var(--primary);
  font-size: 24px;
  margin: 32px 0 0;
  display: block;
  opacity: 0.6;
}

/* Content Pages */
.page {
  padding-top: calc(var(--nav-height) + 40px);
  padding-bottom: 80px;
}

.page-header {
  text-align: center;
  padding: 48px 24px 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}

.page-header h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -1.5px;
  margin-bottom: 12px;
}

.page-header .subtitle {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 500px;
  margin: 0 auto;
}

.page-body {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.page-body h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.page-body h2:first-child {
  margin-top: 0;
}

.page-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--primary);
}

.page-body p {
  margin-bottom: 16px;
  color: var(--text-dim);
  line-height: 1.8;
}

.page-body ul {
  margin: 0 0 20px 20px;
  color: var(--text-dim);
}

.page-body li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.page-body strong {
  color: var(--text);
}

.page-body code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--secondary);
}

.page-body .feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.page-body .feature-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.page-body .feature-item h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.page-body .feature-item p {
  font-size: 14px;
  margin: 0;
}

.page-body .ext-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.page-body .divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

/* Two-column layout for Engines page */
.engine-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 32px 0;
}

.engine-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.engine-card h3 {
  color: var(--text);
  margin-top: 0;
}

.engine-card .engine-icon {
  font-size: 32px;
  margin-bottom: 12px;
  display: block;
}

.engine-card p {
  font-size: 14px;
}

.engine-card ul {
  margin: 12px 0 0;
  list-style: none;
  padding: 0;
}

.engine-card ul li {
  font-size: 13px;
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.engine-card ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary);
}

/* Contact Form */
.contact-form {
  max-width: 520px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color 0.2s;
  outline: none;
}

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

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

.submit-btn {
  background: var(--primary);
  color: #0b0a0e;
  font-weight: 600;
  font-size: 15px;
  padding: 14px 36px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  width: 100%;
}

.submit-btn:hover {
  background: #e0b85a;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 24px 24px;
  margin-top: 40px;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-brand .footer-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-dimmer);
  margin-top: 6px;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-dim);
  font-size: 13px;
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: 32px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 12px;
  color: var(--text-dimmer);
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
  .nav { padding: 0 16px; }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(11, 10, 14, 0.98);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 8px;
    gap: 2px;
  }

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

  .nav-toggle { display: block; }

  .hero { min-height: 70vh; padding: 60px 20px; }

  .engine-compare { grid-template-columns: 1fr; }

  .footer-content { flex-direction: column; text-align: center; align-items: center; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 32px; }
  .hero p { font-size: 15px; }
  .project-card { padding: 24px; }
  .page-header { padding: 32px 16px 28px; }
}