/* === Base === */
:root {
  --bg: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #1a1a28;
  --bg-dark: #060609;
  --text: #e4e4ef;
  --text-dim: #8888a0;
  --accent: #d4a574;
  --accent2: #7c9bf5;
  --accent3: #6ee7b7;
  --border: #1e1e2e;
  --radius: 12px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: opacity 0.2s; }
a:hover { opacity: 0.8; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* === Nav === */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo { font-size: 1.4rem; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--text); opacity: 1; }

.btn-nav {
  background: var(--accent);
  color: var(--bg) !important;
  padding: 6px 16px;
  border-radius: 8px;
  font-weight: 600;
}

.btn-nav:hover { opacity: 0.9 !important; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* === Hero === */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 50% 30%, rgba(212, 165, 116, 0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 30% 70%, rgba(124, 155, 245, 0.06) 0%, transparent 50%);
  animation: glow 8s ease-in-out infinite alternate;
}

@keyframes glow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(2%, -2%); }
}

.hero-content { position: relative; z-index: 1; max-width: 800px; }

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent2), var(--accent3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 60px;
}

.btn {
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.2s;
  display: inline-block;
}

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

.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

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

.btn-secondary:hover { border-color: var(--text-dim); opacity: 1; }

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

.stat { text-align: center; }

.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 500;
}

/* === Sections === */
.section { padding: 100px 0; }
.section-dark { background: var(--bg-dark); }

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-desc {
  text-align: center;
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 48px;
}

/* === Architecture === */
.section-arch { background: var(--bg-dark); }

.arch-diagram {
  max-width: 700px;
  margin: 0 auto;
}

.arch-layer {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}

.arch-layer.visible { opacity: 1; transform: translateY(0); }

.arch-label {
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.arch-top .arch-label { color: var(--accent); }
.arch-mid .arch-label { color: var(--accent2); }
.arch-bottom .arch-label { color: var(--accent3); }

.arch-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.arch-items span {
  background: rgba(255,255,255,0.05);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.arch-arrow {
  text-align: center;
  padding: 8px;
  color: var(--text-dim);
  font-size: 1.2rem;
}

/* === Grid === */
.grid {
  display: grid;
  gap: 20px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* === Cards === */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(20px);
}

.card.visible { opacity: 1; transform: translateY(0); }

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(212, 165, 116, 0.2);
  transform: translateY(-2px);
}

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

.card-icon { font-size: 2rem; margin-bottom: 16px; }

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.card p {
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.6;
}

.card code {
  background: rgba(255,255,255,0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.card-compact { padding: 24px; text-align: center; }
.card-compact .card-icon { font-size: 2.5rem; }

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}

.tag {
  background: rgba(124, 155, 245, 0.1);
  color: var(--accent2);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}

.card-featured { border-color: rgba(212, 165, 116, 0.15); }

.ext-list { margin: 16px 0; }

.ext-item {
  padding: 8px 0;
  font-size: 0.88rem;
  color: var(--text-dim);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.ext-item strong { color: var(--text); }

.card-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.9rem;
  font-weight: 600;
}

.card-note {
  margin-top: 12px;
  font-size: 0.82rem !important;
  opacity: 0.7;
}

/* === Workflow === */
.workflow-steps {
  list-style: none;
  counter-reset: step;
  margin-top: 12px;
}

.workflow-steps li {
  counter-increment: step;
  padding: 6px 0 6px 32px;
  position: relative;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.workflow-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 6px;
  width: 22px;
  height: 22px;
  background: rgba(212, 165, 116, 0.15);
  color: var(--accent);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* === Resource Cards === */
.resource-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(20px);
  color: var(--text);
}

.resource-card.visible { opacity: 1; transform: translateY(0); }

.resource-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(212, 165, 116, 0.2);
  transform: translateY(-2px);
  opacity: 1;
}

.resource-card.visible:hover { transform: translateY(-2px); }

.resource-icon { font-size: 2rem; margin-bottom: 12px; }

.resource-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.resource-card p {
  color: var(--text-dim);
  font-size: 0.88rem;
}

/* === Code Block === */
.section-cta {
  background: var(--bg-dark);
  text-align: center;
  padding: 80px 0;
}

.section-cta h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 32px;
}

.code-block {
  max-width: 560px;
  margin: 0 auto;
  background: #0d0d14;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: left;
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-dot.red { background: #ff5f57; }
.code-dot.yellow { background: #febc2e; }
.code-dot.green { background: #28c840; }

.code-title {
  margin-left: 8px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.code-block pre {
  padding: 20px;
  overflow-x: auto;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text);
}

.code-comment { color: #5a5a7a; }
.code-prompt { color: var(--accent3); }

/* === Footer === */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}

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

.footer-brand {
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-direction: column;
  align-items: flex-start;
}

.footer-note {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 4px;
  font-weight: 400;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-links a:hover { color: var(--text); opacity: 1; }

/* === Responsive === */
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .nav { padding: 16px 20px; }

  .hero { padding: 100px 20px 60px; }
  .hero h1 { font-size: 2.5rem; }
  .hero-desc { font-size: 1rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 1.5rem; }

  .section { padding: 60px 0; }
  .section-title { font-size: 1.7rem; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

  .footer-content { flex-direction: column; gap: 20px; text-align: center; }
  .footer-brand { align-items: center; }
}