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

:root {
  --bg: #0a0a0b;
  --bg-card: #111114;
  --bg-alt: #0d0d10;
  --bg-muted: #1a1a1f;
  --border: #222228;
  --border-light: #2a2a30;
  --text: #e2e4e9;
  --text-muted: #6b7280;
  --accent: #6366f1;
  --accent-hover: #5558e3;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --accent-glow-strong: rgba(99, 102, 241, 0.25);
  --radius: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
}

html { color-scheme: dark; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(99, 102, 241, 0.3); color: #fff; }

a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--accent-hover); }

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 0.15em 0.4em;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--accent);
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 1.5rem; }

/* ===== Nav ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.nav-brand {
  display: flex; align-items: center; gap: 0.5rem;
  font-weight: 600; font-size: 1rem; color: var(--text);
}
.nav-brand:hover { color: var(--text); }
.nav-icon { width: 20px; height: 20px; color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-links a { color: var(--text-muted); font-size: 0.875rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); }
.nav-github svg { width: 20px; height: 20px; color: var(--text-muted); transition: color 0.15s; }
.nav-github:hover svg { color: var(--text); }

/* Lang toggle */
.lang-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 24px;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.03em;
  color: var(--text-muted);
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}
.lang-toggle:hover { color: var(--accent); border-color: rgba(99, 102, 241, 0.4); }

/* ===== Hero ===== */
.hero {
  padding: 10rem 0 4rem;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 999px;
  margin-bottom: 1.5rem;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}
.accent { color: var(--accent); }
.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }
.hero-note {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}
.btn-icon { width: 16px; height: 16px; }
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-secondary {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border-light);
}
.btn-secondary:hover { color: var(--text); border-color: rgba(99, 102, 241, 0.4); }
.btn-lg { padding: 0.75rem 1.75rem; font-size: 0.95rem; }
.btn-full { width: 100%; justify-content: center; }

/* ===== Hero Preview ===== */
.hero-preview { margin-top: 3.5rem; }
.preview-window {
  max-width: 700px;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 0 40px var(--accent-glow);
}
.preview-titlebar {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(17, 17, 20, 0.8);
  border-bottom: 1px solid var(--border);
}
.preview-dots { display: flex; gap: 6px; }
.preview-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--bg-muted); border: 1px solid var(--border-light);
}
.preview-title { font-size: 0.75rem; color: var(--text-muted); }
.preview-body { display: flex; min-height: 200px; }
.preview-sidebar {
  width: 160px; padding: 0.75rem 0.5rem;
  border-right: 1px solid var(--border);
  flex-shrink: 0;
}
.preview-sidebar-item {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.4rem 0.6rem;
  font-size: 0.75rem;
  border-radius: var(--radius);
  color: var(--text-muted);
  margin-bottom: 2px;
}
.preview-sidebar-item.active {
  background: var(--accent-glow);
  color: var(--accent);
}
.preview-content { flex: 1; padding: 1rem; display: flex; flex-direction: column; gap: 0.75rem; }
.preview-card {
  padding: 0.75rem;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.preview-card-header {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.8rem; font-weight: 500; margin-bottom: 0.5rem;
}
.preview-card-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.preview-badge {
  margin-left: auto;
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
  background: var(--accent-glow);
  color: var(--accent);
  border-radius: 999px;
}
.preview-card-tags { display: flex; gap: 0.4rem; }
.preview-tag {
  font-size: 0.65rem;
  padding: 0.15rem 0.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
}

/* ===== Sections ===== */
.section { padding: 5rem 0; }
.section-alt { background: var(--bg-alt); }
.section-title {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 3rem;
}

/* ===== Steps ===== */
.steps {
  display: flex; align-items: flex-start; justify-content: center;
  gap: 1rem; margin-bottom: 4rem; flex-wrap: wrap;
}
.step {
  text-align: center; max-width: 220px; position: relative;
}
.step-number {
  position: absolute; top: -8px; right: -8px;
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 700;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  z-index: 1;
}
.step-icon {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1rem;
  background: var(--accent-glow);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-lg);
}
.step-icon svg { width: 24px; height: 24px; color: var(--accent); }
.step h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.4rem; }
.step p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; }
.step-arrow { color: var(--border-light); margin-top: 1.5rem; }
.step-arrow svg { width: 24px; height: 24px; }

/* ===== Feature cards ===== */
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.feature-card {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s;
}
.feature-card:hover { border-color: rgba(99, 102, 241, 0.4); }
.feature-icon {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-glow);
  border-radius: var(--radius);
  margin-bottom: 1rem;
}
.feature-icon svg { width: 20px; height: 20px; color: var(--accent); }
.feature-card h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.4rem; }
.feature-card p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; }

/* ===== Workflow ===== */
.workflow-grid { display: flex; flex-direction: column; gap: 1.5rem; margin-bottom: 2rem; }
.workflow-track {
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.workflow-track-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.workflow-pipeline {
  display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
}
.workflow-step {
  display: flex; flex-direction: column; align-items: center; gap: 0.25rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.workflow-step code {
  font-size: 0.8rem; background: none; border: none; padding: 0;
  color: var(--accent); font-weight: 600;
}
.workflow-step span { font-size: 0.7rem; color: var(--text-muted); }
.workflow-arrow { color: var(--border-light); font-size: 1rem; }

.workflow-output {
  max-width: 480px; margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.workflow-output-header {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1rem;
  font-size: 0.8rem; font-weight: 500;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.workflow-output-tree {
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.8;
  color: var(--text);
  overflow-x: auto;
}
.tree-comment { color: var(--text-muted); }

/* ===== IDE Grid ===== */
.ide-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem; max-width: 700px; margin: 0 auto;
}
.ide-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s;
}
.ide-card:hover { border-color: rgba(99, 102, 241, 0.4); }
.ide-name { font-size: 1rem; font-weight: 600; margin-bottom: 0.5rem; }
.ide-path { font-size: 0.8rem; }

/* ===== Pricing ===== */
.pricing-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem; max-width: 640px; margin: 0 auto;
}
.pricing-card {
  position: relative;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
}
.pricing-card-pro {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 0 30px var(--accent-glow);
}
.pricing-badge-early {
  position: absolute; top: -10px; left: 50%; transform: translateX(-50%);
  padding: 0.25rem 0.85rem;
  font-size: 0.7rem; font-weight: 600;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  border-radius: 999px;
  white-space: nowrap;
}
.pricing-name { font-size: 1rem; font-weight: 600; margin-bottom: 0.5rem; }
.pricing-price {
  font-size: 3rem; font-weight: 700; letter-spacing: -0.03em;
}
.pricing-price-early {
  display: flex; align-items: baseline; justify-content: center; gap: 0.75rem;
}
.pricing-price-old {
  font-size: 1.5rem; font-weight: 600;
  color: var(--text-muted);
  text-decoration: line-through;
  text-decoration-color: rgba(239, 68, 68, 0.6);
}
.pricing-price-free {
  font-size: 3rem; font-weight: 700; letter-spacing: -0.03em;
  color: #10b981;
}
.pricing-price-free .pricing-currency { font-size: 1.5rem; color: #10b981; }
.pricing-currency { font-size: 1.5rem; }
.pricing-mo { font-size: 1rem; font-weight: 400; color: var(--text-muted); }
.pricing-period { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.pricing-features { list-style: none; margin-bottom: 1.5rem; }
.pricing-features li {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.35rem 0;
  font-size: 0.875rem; color: var(--text);
}
.pricing-features svg { color: var(--accent); flex-shrink: 0; }
.pricing-soon {
  font-size: 0.65rem;
  padding: 0.1rem 0.35rem;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
}

/* ===== Download ===== */
.download-section { text-align: center; padding: 2rem 0; }
.download-buttons { margin-bottom: 1rem; }
.download-links {
  font-size: 0.8rem; color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.download-links a { color: var(--text-muted); }
.download-links a:hover { color: var(--accent); }
.download-sep { margin: 0 0.5rem; color: var(--border-light); }
.download-gatekeeper {
  max-width: 480px; margin: 0 auto;
  font-size: 0.8rem; color: var(--text-muted);
  text-align: left;
}
.download-gatekeeper summary {
  cursor: pointer; color: var(--text-muted);
  padding: 0.5rem 0;
}
.download-gatekeeper summary:hover { color: var(--text); }
.download-gatekeeper p {
  padding: 0.5rem 0 0 1rem;
  line-height: 1.6;
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
}
.footer-brand {
  display: flex; align-items: center; gap: 0.5rem;
  font-weight: 600; font-size: 0.875rem; color: var(--text-muted);
}
.footer-brand .nav-icon { width: 16px; height: 16px; color: var(--accent); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: 0.8rem; color: var(--text-muted); }
.footer-links a:hover { color: var(--text); }
.footer-copy { font-size: 0.75rem; color: var(--text-muted); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero { padding: 7rem 0 3rem; }
  .step-arrow { display: none; }
  .steps { flex-direction: column; align-items: center; }
  .workflow-pipeline { justify-content: center; }
  .preview-sidebar { display: none; }
  .nav-links a:not(.nav-github) { display: none; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}

@media (max-width: 480px) {
  .pricing-grid { grid-template-columns: 1fr; }
  .ide-grid { grid-template-columns: 1fr; }
}