/* ThreadWeaver Product Page — Design System + Styles */

:root {
  --accent: #7b68ee;
  --accent-glow: #7b68ee33;
  --accent-subtle: #7b68ee18;
  --cyan: #00d4ff;
  --bg-primary: #0f0f1a;
  --bg-secondary: #16162a;
  --bg-tertiary: #1a1a35;
  --bg-hover: #1e1e3a;
  --border: #2a2a4a;
  --text-primary: #e0e0e0;
  --text-secondary: #999;
  --text-muted: #666;
  --success: #00ff88;
  --error: #ff4444;
  --radius: 12px;
  --radius-sm: 8px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { filter: brightness(1.2); }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ─── Sticky Nav ────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 56px; display: flex; align-items: center; justify-content: center;
  background: rgba(15,15,26,0.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  opacity: 0; transform: translateY(-100%);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}
.nav.visible { opacity: 1; transform: translateY(0); pointer-events: all; }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1100px; width: 100%; padding: 0 24px;
}
.nav-logo {
  font-size: 16px; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--text-secondary); font-size: 13px; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--accent); filter: none; }

/* ─── Hero ──────────────────────────────────────────────── */
.hero {
  position: relative; text-align: center;
  padding: 120px 24px 80px; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(123,104,238,0.15), transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(0,212,255,0.08), transparent 60%);
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
}
.hero > * { position: relative; z-index: 1; }
.hero h1 {
  font-size: 52px; font-weight: 800; letter-spacing: -1px; margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero .tagline {
  font-size: 20px; color: var(--text-secondary); max-width: 640px;
  margin: 0 auto 8px; line-height: 1.5;
}
.hero .subtitle {
  font-size: 14px; color: var(--text-muted); margin-bottom: 28px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
}
.badge {
  display: inline-block; font-size: 11px; color: var(--accent);
  background: var(--accent-subtle); border: 1px solid var(--accent);
  padding: 3px 10px; border-radius: 20px; font-weight: 600;
  letter-spacing: 0.5px; margin-bottom: 20px;
}
.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--radius-sm); font-size: 14px;
  font-weight: 600; cursor: pointer; transition: all 0.2s; border: none;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.15); transform: translateY(-2px); box-shadow: 0 4px 16px var(--accent-glow); }
.btn-secondary {
  background: transparent; color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ─── Section basics ────────────────────────────────────── */
.section { padding: 80px 24px; }
.section-label {
  font-size: 11px; color: var(--accent); text-transform: uppercase;
  letter-spacing: 2px; font-weight: 700; margin-bottom: 8px; text-align: center;
}
.section-title {
  font-size: 32px; font-weight: 700; text-align: center;
  margin-bottom: 48px; color: var(--text-primary);
}

/* ─── Feature demos ─────────────────────────────────────── */
.feature-block {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
  align-items: center; margin-bottom: 80px; max-width: 960px; margin-left: auto; margin-right: auto;
}
.feature-block.reverse { direction: rtl; }
.feature-block.reverse > * { direction: ltr; }
.feature-text h3 { font-size: 24px; font-weight: 700; margin-bottom: 12px; }
.feature-text p { font-size: 15px; color: var(--text-secondary); line-height: 1.7; }

/* CSS Mockup: shared */
.mockup {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; max-width: 440px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

/* Mockup: chat messages */
.mock-msg { display: flex; gap: 10px; margin-bottom: 12px; padding: 10px; border-radius: var(--radius-sm); }
.mock-msg:last-child { margin-bottom: 0; }
.mock-msg.user { background: var(--accent-subtle); border-left: 3px solid var(--accent); }
.mock-msg.assistant { background: var(--bg-tertiary); border: 1px solid var(--border); }
.mock-avatar {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
}
.mock-msg.user .mock-avatar { background: var(--accent); }
.mock-msg.assistant .mock-avatar { background: var(--bg-primary); border: 1px solid var(--border); }
.mock-role { font-size: 9px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px; }
.mock-msg.user .mock-role { color: var(--accent); }
.mock-msg.assistant .mock-role { color: var(--text-muted); }
.mock-line {
  height: 8px; border-radius: 4px; background: var(--bg-tertiary); margin-bottom: 4px;
}
.mock-msg.user .mock-line { background: var(--accent-glow); }
.mock-line.w80 { width: 80%; }
.mock-line.w60 { width: 60%; }
.mock-line.w90 { width: 90%; }
.mock-line.w50 { width: 50%; }
.mock-line.w70 { width: 70%; }

/* Mockup: branch indicator */
.mock-branch-point {
  text-align: center; padding: 8px 0; color: var(--accent);
  font-size: 11px; font-weight: 600;
}
.mock-branch-point .dot { display: inline-block; width: 10px; height: 10px; background: var(--accent); border-radius: 50%; vertical-align: middle; margin-right: 6px; }
.mock-branches { display: flex; gap: 8px; }
.mock-branch-stub {
  flex: 1; background: var(--bg-tertiary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px 10px; font-size: 10px;
  color: var(--text-muted); border-top: 2px solid var(--accent);
}

/* Mockup: provenance timeline */
.mock-timeline { padding-left: 20px; position: relative; }
.mock-timeline::before {
  content: ''; position: absolute; left: 6px; top: 8px; bottom: 8px;
  width: 2px; background: var(--border);
}
.mock-prov-entry { position: relative; margin-bottom: 12px; }
.mock-prov-dot {
  position: absolute; left: -18px; top: 6px;
  width: 10px; height: 10px; background: var(--accent);
  border-radius: 50%; border: 2px solid var(--bg-secondary);
}
.mock-prov-card {
  background: var(--bg-tertiary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px 10px;
}
.mock-prov-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; }
.mock-prov-cat {
  font-size: 9px; font-weight: 700; color: var(--accent); text-transform: uppercase;
  background: var(--accent-subtle); padding: 1px 6px; border-radius: 3px;
}
.mock-prov-time { font-size: 9px; color: var(--text-muted); }
.mock-prov-desc { font-size: 11px; color: var(--text-primary); margin-bottom: 2px; }
.mock-prov-meta { font-size: 9px; color: var(--text-muted); display: flex; gap: 8px; }
.mock-prov-conf { color: var(--success); font-weight: 600; }

/* Mockup: code block */
.mock-code {
  background: var(--bg-primary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 12px; margin: 6px 0;
  font-family: 'SF Mono', Menlo, Consolas, monospace; font-size: 11px;
}
.mock-code .line { margin-bottom: 2px; }
.mock-code .kw { color: var(--accent); }
.mock-code .str { color: var(--success); }
.mock-code .cm { color: var(--text-muted); }
.mock-code .fn { color: var(--cyan); }

/* Mockup: tool call */
.mock-tool-badge {
  display: inline-block; font-size: 10px; font-weight: 600;
  color: var(--accent); background: var(--accent-subtle);
  border: 1px solid var(--accent); padding: 2px 8px;
  border-radius: 10px; margin: 4px 0;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
}
.mock-tool-result {
  background: var(--bg-primary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px 10px; margin: 6px 0;
  font-size: 11px; color: var(--text-secondary);
  font-family: 'SF Mono', Menlo, Consolas, monospace;
}

/* ─── Provider logos ────────────────────────────────────── */
.providers { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 32px; }
.provider-pill {
  padding: 8px 18px; border-radius: 20px; font-size: 13px; font-weight: 600;
  border: 1px solid; background: transparent;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ─── Architecture diagram ──────────────────────────────── */
.arch { text-align: center; padding: 32px 0; }
.arch-box {
  display: inline-block; padding: 12px 28px; border-radius: var(--radius-sm);
  background: var(--bg-secondary); border: 1px solid var(--border);
  font-size: 14px; font-weight: 600; position: relative;
}
.arch-box.accent { border-left: 3px solid var(--accent); color: var(--accent); }
.arch-connector {
  width: 2px; height: 32px; background: var(--border);
  margin: 0 auto;
}
.arch-split { display: flex; justify-content: center; gap: 80px; margin-top: 8px; }
.arch-branch { text-align: center; }
.arch-branch-label { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; font-weight: 600; }
.arch-pills { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; max-width: 280px; }
.arch-pill {
  font-size: 10px; padding: 3px 8px; border-radius: 10px;
  background: var(--bg-tertiary); border: 1px solid var(--border);
  color: var(--text-secondary);
}
.arch-y { display: flex; justify-content: center; align-items: flex-start; gap: 0; }
.arch-y-line {
  width: 2px; height: 24px; background: var(--border);
}
.arch-y-horiz {
  width: 160px; height: 2px; background: var(--border);
  margin-top: 24px;
}

/* ─── Comparison table ──────────────────────────────────── */
.compare-table-wrap { overflow-x: auto; max-width: 800px; margin: 0 auto; }
.compare-table {
  width: 100%; border-collapse: collapse; font-size: 14px;
}
.compare-table th, .compare-table td {
  padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border);
}
.compare-table th {
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px;
  color: var(--text-muted); font-weight: 600;
}
.compare-table th:last-child { color: var(--accent); }
.compare-table td:last-child { background: var(--accent-subtle); }
.compare-table .check { color: var(--success); font-weight: 700; }
.compare-table .cross { color: var(--text-muted); }
.compare-table .feat-icon { margin-right: 8px; }

/* ─── Terminal mockup ───────────────────────────────────── */
.terminal {
  max-width: 640px; margin: 0 auto; border-radius: var(--radius);
  background: var(--bg-primary); border: 1px solid var(--border);
  overflow: hidden; box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.terminal-bar {
  padding: 10px 14px; display: flex; align-items: center; gap: 8px;
  background: var(--bg-secondary); border-bottom: 1px solid var(--border);
}
.terminal-dot { width: 10px; height: 10px; border-radius: 50%; }
.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #febc2e; }
.terminal-dot.green { background: #28c840; }
.terminal-title { font-size: 11px; color: var(--text-muted); margin-left: 8px; }
.terminal-body {
  padding: 16px; font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 13px; line-height: 1.7; min-height: 180px;
}
.terminal-body .prompt { color: var(--success); }
.terminal-body .cmd { color: var(--cyan); }
.terminal-body .output { color: var(--text-muted); }
.terminal-body .cursor {
  display: inline-block; width: 8px; height: 16px;
  background: var(--text-primary); vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}
.install-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; max-width: 640px; margin: 32px auto 0; }
.install-card {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px; text-align: center;
}
.install-card h4 { font-size: 14px; margin-bottom: 4px; }
.install-card code {
  font-size: 11px; color: var(--cyan);
  background: var(--bg-primary); padding: 2px 6px; border-radius: 4px;
}
.install-card p { font-size: 11px; color: var(--text-muted); margin-top: 6px; }

/* ─── Enterprise teaser ─────────────────────────────────── */
.enterprise-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; max-width: 900px; margin: 0 auto; }
.enterprise-bullets { list-style: none; }
.enterprise-bullets li {
  padding: 8px 0; font-size: 14px; color: var(--text-secondary); line-height: 1.6;
  padding-left: 24px; position: relative;
}
.enterprise-bullets li::before {
  content: '\2713'; position: absolute; left: 0; color: var(--accent); font-weight: 700;
}
.enterprise-links { margin-top: 20px; display: flex; gap: 16px; }

/* Epoch chain mockup */
.mock-epoch { display: flex; align-items: center; gap: 0; justify-content: center; }
.mock-epoch-block {
  background: var(--bg-tertiary); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 14px; text-align: center;
  min-width: 80px;
}
.mock-epoch-hash {
  font-size: 10px; color: var(--text-muted);
  font-family: 'SF Mono', Menlo, Consolas, monospace;
}
.mock-epoch-label { font-size: 9px; color: var(--text-secondary); margin-top: 2px; }
.mock-epoch-link {
  width: 24px; height: 2px; background: var(--border);
}
.mock-epoch-seal {
  font-size: 10px; font-weight: 700; color: var(--success);
  background: rgba(0,255,136,0.1); border: 1px solid var(--success);
  padding: 2px 8px; border-radius: 10px; margin-left: 12px;
}

/* ─── Footer ────────────────────────────────────────────── */
.footer {
  background: var(--bg-secondary); border-top: 1px solid var(--border);
  padding: 48px 24px 24px;
}
.footer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; max-width: 800px; margin: 0 auto 32px; }
.footer-col h4 { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.footer-col a { display: block; color: var(--text-secondary); font-size: 13px; padding: 3px 0; transition: color 0.2s; }
.footer-col a:hover { color: var(--accent); filter: none; }
.footer-bottom {
  text-align: center; font-size: 12px; color: var(--text-muted);
  padding-top: 24px; border-top: 1px solid var(--border);
}

/* ─── Scroll reveal ─────────────────────────────────────── */
[data-reveal] {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
[data-reveal="left"] { transform: translateX(-40px); }
[data-reveal="right"] { transform: translateX(40px); }
[data-reveal].revealed { opacity: 1; transform: none; }

/* ─── Animations ────────────────────────────────────────── */
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes blink {
  50% { opacity: 0; }
}
@keyframes fadeIn {
  from { opacity: 0; } to { opacity: 1; }
}

/* ─── Responsive ────────────────────────────────────────── */
@media (max-width: 900px) {
  .feature-block { grid-template-columns: 1fr; gap: 24px; }
  .feature-block.reverse { direction: ltr; }
  .enterprise-grid { grid-template-columns: 1fr; }
  .arch-split { flex-direction: column; gap: 24px; align-items: center; }
  .arch-y-horiz { display: none; }
  .install-cards { grid-template-columns: 1fr; max-width: 360px; }
}
@media (max-width: 600px) {
  .hero h1 { font-size: 32px; }
  .hero .tagline { font-size: 16px; }
  .section-title { font-size: 24px; }
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 11px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .cta-row { flex-direction: column; align-items: center; }
}