/* ───────────────────────────────────────────────
   Clawdia Landing Page
   Terminal monospace theme — matched to app README
   ─────────────────────────────────────────────── */

:root {
  --bg-primary: #161616;
  --bg-secondary: #1c1c1c;
  --bg-tertiary: #242424;
  --bg-elevated: #2a2a2a;
  --bg-code: #242424;
  --accent: #0e7490;
  --accent-hover: #0891b2;
  --accent-glow: rgba(14, 116, 144, 0.15);
  --text-primary: #d4d4d4;
  --text-secondary: #6b6b6b;
  --text-tertiary: #525252;
  --border: #2e2e32;
  --border-subtle: rgba(255, 255, 255, 0.04);
  --border-hover: #3a3a3e;
  --error: #f87171;
  --success: #4ade80;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

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

/* ─── Scrollbars ─── */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }
::-webkit-scrollbar-corner { background: transparent; }

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

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.7;
  overflow-x: hidden;
}

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

.container { max-width: 1080px; margin: 0 auto; padding: 0 32px; }

/* ─── Top Bar ─── */

.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 32px;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
  pointer-events: none;
  opacity: 0;
}

.topbar.visible {
  opacity: 1;
  pointer-events: auto;
  background: var(--bg-primary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.topbar-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.topbar-brand {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.35em;
}

.topbar-links { display: flex; gap: 28px; align-items: center; }
.topbar-links a {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-tertiary);
  transition: color 0.15s;
}
.topbar-links a:hover { color: var(--text-primary); }

.topbar-download {
  background: var(--bg-elevated);
  color: var(--text-secondary) !important;
  padding: 6px 16px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-size: 14px !important;
  transition: color 0.15s !important, border-color 0.15s !important;
}
.topbar-download:hover {
  color: var(--text-primary) !important;
  border-color: var(--text-tertiary) !important;
  background: var(--bg-elevated) !important;
}

/* ─── Hero ─── */

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 32px 0;
  position: relative;
  text-align: center;
}

.hero::before {
  display: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 800px;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  font-weight: 400;
  letter-spacing: 0.35em;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.hero-tagline {
  font-size: 16px;
  color: var(--text-tertiary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 400;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.1s;
  border: 1px solid var(--border);
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--text-tertiary);
}
.btn-primary:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--text-tertiary);
}

.hero-note {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}
.hero-note a { color: var(--text-secondary); text-decoration: underline; text-underline-offset: 2px; }
.hero-note a:hover { color: var(--text-primary); }

.hero-size {
  font-size: 13px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

/* Hero Media */

.hero-media {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 900px;
  aspect-ratio: 16 / 9;
  margin: 32px auto 0;
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: max-width 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
  box-shadow: 0 10px 30px rgba(10, 12, 16, 0.2);
}

.hero-media.is-expanded {
  z-index: 10;
  transform-origin: top left;
  transform: scale(1.35);
  box-shadow: 0 20px 50px rgba(10, 12, 16, 0.4);
}

.hero-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.hero-media-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.fallback-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--text-tertiary);
  opacity: 0.5;
}

.fallback-text {
  font-size: 14px;
  color: var(--text-tertiary);
  opacity: 0.5;
}

.hero-caption {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  max-width: 100%;
  margin-top: 16px;
  margin-bottom: 32px;
}

.hero-caption strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ─── Sections ─── */

.section {
  padding: 80px 0;
}

.section-title {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: 56px;
  color: var(--text-primary);
}

/* ─── Features ─── */

.section-features {
  border-top: 1px solid var(--border);
}

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 72px;
}

.feature-row-reverse .feature-text { order: 2; }
.feature-row-reverse .feature-visual { order: 1; }

.feature-label {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.feature-text p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

.feature-code {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

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

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg-elevated);
}

.feature-code pre {
  padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-primary);
  overflow-x: auto;
}

.c-kw { color: var(--text-primary); }
.c-str { color: var(--accent); }
.c-cm { color: var(--text-tertiary); }
.c-you { color: var(--text-secondary); }
.c-ai { color: var(--text-primary); }
.c-ok { color: var(--success); }

.feature-punchline {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-tertiary);
  text-align: center;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--border);
  margin: 0;
}

.feature-aside {
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.7;
  margin-top: 14px;
}

/* BYOK visual */
.feature-code-byok {
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.byok-flow {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 15px;
}

.byok-node {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 10px 20px;
  border-radius: 4px;
  color: var(--text-secondary);
}

.byok-node-accent {
  border-color: var(--text-tertiary);
  color: var(--text-primary);
}

.byok-arrow { color: var(--text-tertiary); font-size: 18px; }

.byok-note {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 24px;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: var(--text-tertiary);
}

.feature-card h4 {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ─── Getting Started ─── */

.section-start {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  margin-bottom: 48px;
}

.step {
  flex: 0 1 260px;
  text-align: center;
  padding: 0 20px;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.step h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.step p a { text-decoration: underline; text-underline-offset: 2px; }

.step-connector {
  flex: 0 0 48px;
  height: 1px;
  background: var(--border);
  margin-top: 20px;
}

.build-source {
  text-align: center;
  margin-bottom: 56px;
}

.build-source > p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.code-block {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 14px 20px;
  max-width: 100%;
  overflow-x: auto;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-primary);
  white-space: nowrap;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 5px 12px;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  flex-shrink: 0;
}

.copy-btn:hover { color: var(--text-primary); border-color: var(--text-tertiary); }
.copy-btn.copied { color: var(--success); border-color: var(--success); }

.copy-text { min-width: 40px; text-align: center; }

/* Download Grid */
.download-all {
  text-align: center;
}

.download-all h3 {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.download-grid {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.download-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 24px 40px;
  color: var(--text-secondary);
  transition: border-color 0.2s, color 0.2s;
}

.download-card:hover {
  border-color: var(--text-tertiary);
  color: var(--text-primary);
}

.download-card[data-current="true"] {
  border-color: var(--text-tertiary);
}

.download-os {
  font-weight: 600;
  font-size: 16px;
  color: var(--text-primary);
}

.download-format {
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--text-tertiary);
}

.download-all-note {
  font-size: 14px;
  color: var(--text-tertiary);
}
.download-all-note a { text-decoration: underline; text-underline-offset: 2px; }

/* ─── Footer ─── */

.footer {
  padding: 48px 0;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.35em;
  color: var(--text-tertiary);
  margin-bottom: 14px;
}

.footer-author {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.footer-links {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-bottom: 18px;
}

.footer-links a { color: var(--text-secondary); }
.footer-links a:hover { color: var(--text-primary); }
.footer-sep { margin: 0 8px; }

.footer-powered {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ─── Scroll Animations ─── */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ─── Responsive ─── */

@media (max-width: 768px) {
  .hero { padding: 80px 20px 56px; }
  .hero-title { font-size: 1.3rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 300px; justify-content: center; }

  .feature-row,
  .feature-row-reverse {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .feature-row-reverse .feature-text { order: 1; }
  .feature-row-reverse .feature-visual { order: 2; }

  .feature-grid { grid-template-columns: 1fr; }

  .steps { flex-direction: column; align-items: center; gap: 24px; }
  .step-connector { width: 1px; height: 24px; flex: 0 0 24px; margin: 0; }

  .code-block { flex-direction: column; gap: 8px; }
  .code-block code { white-space: pre-wrap; word-break: break-all; font-size: 12px; }

  .download-grid { flex-direction: column; align-items: center; }
  .download-card { width: 100%; max-width: 280px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.1rem; }
  .section { padding: 56px 0; }
  .section-title { font-size: 14px; margin-bottom: 40px; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}