/* === Technology Disclosure Pages: style.css === */
/* Extends the main site design system */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

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

:root {
  --bg: #0a0a0f;
  --bg-card: #111118;
  --bg-card-hover: #16161f;
  --accent: #00d4aa;
  --accent-dim: #00a88a;
  --accent-glow: rgba(0, 212, 170, 0.12);
  --text: #e0e0e8;
  --text-dim: #888899;
  --text-bright: #ffffff;
  --border: #1e1e2a;
  --radius: 8px;
  --warn: #ffaa00;
  --warn-glow: rgba(255, 170, 0, 0.1);
  --danger: #ff6644;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* === T&C / Callback pages === */

.tac-page {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  min-height: 100vh;
  padding: 48px 24px;
}

.tac-wrap { width: 100%; max-width: 720px; }

.tac-header {
  text-align: center;
  margin-bottom: 36px;
}

.tac-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-bright);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: block;
  margin-bottom: 4px;
}

.tac-subtitle {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
}

.tac-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 48px;
}

.tac-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.7rem;
  color: var(--text-bright);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.tac-intro {
  color: var(--text-dim);
  margin-bottom: 28px;
  font-size: 0.95rem;
  line-height: 1.7;
}

.terms-scroll {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  max-height: 340px;
  overflow-y: auto;
  margin-bottom: 28px;
  font-size: 0.83rem;
  line-height: 1.85;
  color: var(--text-dim);
}

.terms-scroll h3 {
  font-family: 'Space Grotesk', sans-serif;
  color: var(--text-bright);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.terms-scroll p { margin-bottom: 12px; }
.terms-scroll ul { margin: 8px 0 12px 20px; }
.terms-scroll li { margin-bottom: 6px; }
.terms-scroll strong { color: var(--text); }

.agree-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.agree-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
}

.agree-check label {
  font-size: 0.9rem;
  color: var(--text);
  cursor: pointer;
  line-height: 1.5;
}

.cta-btn {
  display: inline-block;
  padding: 14px 36px;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, opacity 0.2s;
  letter-spacing: 0.02em;
  font-family: 'Inter', sans-serif;
}

.cta-btn:hover:not(:disabled) { background: var(--accent-dim); transform: translateY(-1px); }
.cta-btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none; }
.tac-btn { width: 100%; text-align: center; }

.tac-processing {
  text-align: center;
  padding: 20px 0;
}

.tac-spinner {
  width: 36px; height: 36px;
  border: 3px solid rgba(0,212,170,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 14px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.tac-processing p { color: var(--text-dim); font-size: 0.9rem; }

.tac-error {
  color: var(--danger);
  font-size: 0.85rem;
  padding: 12px;
  background: rgba(255,102,68,0.08);
  border: 1px solid rgba(255,102,68,0.25);
  border-radius: var(--radius);
  margin-top: 12px;
}

.tac-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.tac-footer a { color: var(--accent); text-decoration: none; }

/* === Technology Disclosure (index.html) === */

.tech-nav {
  position: sticky;
  top: 0;
  background: rgba(10,10,15,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  padding: 14px 0;
}

.tech-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.tech-nav-left { display: flex; align-items: baseline; gap: 12px; }

.tech-nav-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  color: var(--text-bright);
  text-decoration: none;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.tech-nav-label {
  font-size: 0.7rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.tech-nav-back {
  font-size: 0.82rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}

.tech-nav-back:hover { color: var(--accent); }

/* Disclosure banner */
.disclosure-banner {
  background: var(--warn-glow);
  border: 1px solid rgba(255,170,0,0.3);
  border-radius: var(--radius);
  padding: 14px 20px;
  font-size: 0.82rem;
  color: var(--text-dim);
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 64px;
}

.disclosure-banner-icon { color: var(--warn); flex-shrink: 0; font-size: 1rem; line-height: 1.5; }
.disclosure-banner strong { color: var(--warn); }

/* Main document body */
.tech-body {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px 100px;
}

/* Section layout */
.tech-section { margin-bottom: 96px; }

.section-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 10px;
}

.tech-section h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  color: var(--text-bright);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.tech-section h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  color: var(--text-bright);
  margin: 36px 0 12px;
}

.tech-section p {
  color: var(--text-dim);
  margin-bottom: 16px;
  line-height: 1.8;
  font-size: 0.97rem;
}

.tech-section ul, .tech-section ol {
  color: var(--text-dim);
  margin: 0 0 16px 24px;
  font-size: 0.95rem;
  line-height: 1.8;
}

.tech-section li { margin-bottom: 6px; }

/* Figures */
.figure-wrap { margin: 40px 0; }

.figure-wrap img {
  width: 100%;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.figure-cap {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--text-dim);
  font-style: italic;
  line-height: 1.5;
}

.figure-cap strong { color: var(--text); font-style: normal; }

/* Two-column figures */
.figure-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 40px 0;
}

/* Algorithm steps */
.algo-steps { margin: 32px 0; display: flex; flex-direction: column; gap: 20px; }

.algo-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.step-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  width: 36px;
  line-height: 1;
  padding-top: 2px;
}

.step-body h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  color: var(--text-bright);
  margin-bottom: 4px;
}

.step-body p { font-size: 0.88rem; margin: 0; }

/* Node table */
.node-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.85rem;
}

.node-table th {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.node-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  vertical-align: top;
}

.node-table tr:last-child td { border-bottom: none; }
.node-table td:first-child { color: var(--text-bright); font-weight: 600; font-family: 'Space Grotesk', sans-serif; }

/* Audio demo cards (same pattern as main site) */
.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s;
  margin-bottom: 16px;
}

.demo-card:hover { border-color: var(--accent); }

.demo-card h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  color: var(--text-bright);
  margin-bottom: 6px;
}

.demo-card p { font-size: 0.82rem; color: var(--text-dim); margin-bottom: 16px; }

.player-row { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.player-label { font-size: 0.72rem; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: 0.08em; width: 52px; flex-shrink: 0; }
.custom-player { display: flex; align-items: center; gap: 10px; flex: 1; }
.play-btn { width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--accent); background: transparent; color: var(--accent); cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 0.7rem; flex-shrink: 0; transition: background 0.2s; }
.play-btn:hover { background: var(--accent-glow); }
.play-btn.playing { background: var(--accent); color: var(--bg); }
.progress-bar { flex: 1; height: 4px; background: var(--border); border-radius: 2px; cursor: pointer; position: relative; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 2px; width: 0%; transition: width 0.1s linear; }
.time { font-size: 0.72rem; color: var(--text-dim); width: 36px; text-align: right; flex-shrink: 0; }

/* Demos grid */
.demos-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }

/* Patent claims */
.claim-block { margin-bottom: 40px; }

.claim-label {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--bg);
  background: var(--accent);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.claim-readable {
  background: var(--bg-card);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 18px 20px;
  color: var(--text-dim);
  font-size: 0.93rem;
  line-height: 1.75;
  margin-bottom: 8px;
}

.claim-formal-toggle {
  font-size: 0.78rem;
  color: var(--accent);
  cursor: pointer;
  background: none;
  border: none;
  padding: 2px 0;
  font-family: 'Inter', sans-serif;
  display: block;
  margin-bottom: 4px;
}

.claim-formal-toggle:hover { text-decoration: underline; }

.claim-formal {
  display: none;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-family: 'Courier New', 'Courier', monospace;
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.8;
  white-space: pre-wrap;
  margin-top: 6px;
}

.claim-formal.open { display: block; }

/* Licensing paths */
.license-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.license-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s;
}

.license-card:hover { border-color: var(--accent); }

.license-card h4 {
  font-family: 'Space Grotesk', sans-serif;
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 10px;
}

.license-card p { font-size: 0.84rem; color: var(--text-dim); margin-bottom: 0; }

/* Contact form */
.tech-contact-form { max-width: 540px; }

.tech-contact-form input,
.tech-contact-form textarea {
  width: 100%;
  padding: 13px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 0.93rem;
  transition: border-color 0.2s;
  margin-bottom: 14px;
  display: block;
}

.tech-contact-form input:focus,
.tech-contact-form textarea:focus { outline: none; border-color: var(--accent); }

.tech-contact-form textarea { resize: vertical; }

/* Divider */
.tech-divider { border: none; border-top: 1px solid var(--border); margin: 0; }

/* === Responsive === */
@media (max-width: 900px) {
  .figure-pair { grid-template-columns: 1fr; }
  .demos-grid-2 { grid-template-columns: 1fr; }
  .license-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .tac-card { padding: 28px 20px; }
  .tech-body { padding: 32px 16px 80px; }
  .tech-section h2 { font-size: 1.5rem; }
  .algo-step { flex-direction: column; gap: 8px; }
}