/* ================================================================
   OpenType — landing page
   macOS system-panel feel. System fonts, system blue accent.
   ================================================================ */

:root {
  --bg: #FAFAFA;
  --panel: #FFFFFF;
  --panel-2: #F2F2F7;
  --text: #1C1C1E;
  --text-secondary: #636366;
  --text-tertiary: #8E8E93;
  --separator: rgba(0, 0, 0, 0.08);
  --accent: #007AFF;
  --accent-hover: #0066D6;
  --accent-subtle: rgba(0, 122, 255, 0.08);
  --shadow-panel: 0 1px 2px rgba(0, 0, 0, 0.04);
  --radius-panel: 12px;
  --radius-button: 8px;
  --max-width: 880px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1C1C1E;
    --panel: #2C2C2E;
    --panel-2: #3A3A3C;
    --text: #F2F2F7;
    --text-secondary: #AEAEB2;
    --text-tertiary: #636366;
    --separator: rgba(255, 255, 255, 0.08);
    --accent: #0A84FF;
    --accent-hover: #1A94FF;
    --accent-subtle: rgba(10, 132, 255, 0.12);
    --shadow-panel: none;
  }
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
               "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
section { padding: 72px 0; }

/* ── NAV ── */
nav.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--separator);
}
@media (prefers-color-scheme: dark) {
  nav.top { background: rgba(28, 28, 30, 0.85); }
}
nav.top .wrap {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo { color: var(--text); font-weight: 600; font-size: 15px; letter-spacing: -0.01em; }
.nav-logo:hover { text-decoration: none; }
.nav-right { display: flex; gap: 12px; align-items: center; }

/* ── HERO ── */
#hero { padding: 96px 0; text-align: center; }
h1.tagline {
  font-size: clamp(40px, 7vw, 56px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-bottom: 16px;
}
.sub { font-size: 17px; color: var(--text-secondary); max-width: 520px; margin: 0 auto 40px; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-button);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid var(--separator);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  transition: background 0.12s ease;
}
.btn:hover { background: var(--panel-2); text-decoration: none; }
.btn-primary { background: var(--accent); color: #FFFFFF; border-color: transparent; }
.btn-primary:hover { background: var(--accent-hover); color: #FFFFFF; }
.btn-large { padding: 12px 24px; font-size: 15px; }

/* ── TRANSCRIPT DEMO ── */
.demo {
  max-width: 640px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--separator);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}
.demo-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--separator);
}
.demo-dots { display: flex; gap: 6px; }
.demo-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--text-tertiary); opacity: 0.5;
}
.mode-toggle {
  display: inline-flex;
  padding: 2px;
  background: var(--bg);
  border-radius: 6px;
  border: 1px solid var(--separator);
}
.mode-toggle button {
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 500;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
.mode-toggle button[aria-pressed="true"] {
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow-panel);
}

.demo-body {
  padding: 32px 32px 24px;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.waveform {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  height: 48px;
}
.waveform .bar {
  width: 3px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0.5;
  transition: height 0.05s linear, opacity 0.2s;
}
.waveform.playing .bar { opacity: 0.85; }

.transcript {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  min-height: 56px;
  text-align: left;
}
.transcript.placeholder { color: var(--text-tertiary); font-style: italic; }
.verbatim-text { display: block; }
.smart-result {
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 17px;
  margin-top: 10px;
  opacity: 0;
  transition: opacity 0.4s ease;
  font-style: normal;
}
.transcript.show-smart .smart-result { opacity: 1; }
.transcript.show-smart .verbatim-text { opacity: 0.35; font-size: 13px; }

.demo-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--panel-2);
  border-top: 1px solid var(--separator);
}
.demo-play {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--accent);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-button);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}
.demo-samples { display: flex; gap: 4px; margin-left: auto; }
.demo-samples button {
  padding: 4px 10px;
  font-size: 12px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
}
.demo-samples button[aria-pressed="true"] {
  background: var(--accent-subtle);
  color: var(--accent);
}

.demo-context {
  display: none;
  margin-top: 12px;
  padding: 10px 12px;
  border: 1px solid var(--separator);
  border-radius: var(--radius-button);
  background: var(--bg);
  gap: 12px;
  align-items: center;
}
.demo-context.visible { display: flex; }
.demo-context .label {
  font-size: 11px;
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.demo-context img {
  width: 64px; height: 48px; border-radius: 4px;
  border: 1px solid var(--separator);
}

/* ── THREE-BEAT ── */
.three-beat {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.beat {
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--separator);
  border-radius: var(--radius-panel);
}
.beat-icon {
  width: 24px; height: 24px; color: var(--text-secondary);
  margin-bottom: 12px;
}
.beat h3 {
  font-size: 17px; font-weight: 600;
  margin-bottom: 6px;
  display: flex; align-items: center; gap: 8px;
}
.keycap {
  display: inline-block;
  padding: 1px 8px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 11px;
  background: var(--panel-2);
  border: 1px solid var(--separator);
  border-radius: 4px;
  color: var(--text-secondary);
  font-weight: 400;
}
.beat p { color: var(--text-secondary); font-size: 14px; }

/* ── PRIVACY ── */
.privacy {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  padding: 32px;
  background: var(--panel);
  border: 1px solid var(--separator);
  border-radius: var(--radius-panel);
}
.privacy strong { display: block; font-size: 20px; font-weight: 600; margin-bottom: 6px; }
.privacy p { color: var(--text-secondary); }
.privacy svg { width: 60px; height: 60px; color: var(--text-tertiary); }

/* ── UNDER THE HOOD ── */
.section-title { font-size: 24px; font-weight: 600; margin-bottom: 24px; letter-spacing: -0.01em; }
.tech-dl {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 8px 24px;
  padding: 24px 32px;
  background: var(--panel);
  border: 1px solid var(--separator);
  border-radius: var(--radius-panel);
}
.tech-dl dt {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 13px; font-weight: 500; color: var(--text);
}
.tech-dl dd { font-size: 13px; color: var(--text-secondary); }
.requirements { margin-top: 16px; font-size: 12px; color: var(--text-tertiary); text-align: center; }
.requirements strong { color: var(--text-secondary); font-weight: 500; }

/* ── INSTALL ── */
#install { text-align: center; }
#install h2 { font-size: 32px; font-weight: 600; margin-bottom: 32px; letter-spacing: -0.02em; }
.install-code {
  display: flex;
  align-items: center;
  gap: 12px;
  width: fit-content;
  margin: 24px auto 0;
  padding: 8px 12px;
  background: var(--panel);
  border: 1px solid var(--separator);
  border-radius: var(--radius-button);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
}
.install-code .copy-label {
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 11px;
  color: var(--text-tertiary);
}
.install-caption { margin-top: 8px; font-size: 12px; color: var(--text-tertiary); }
.providers-line {
  margin: 40px auto 0;
  font-size: 12px;
  color: var(--text-tertiary);
  max-width: 600px;
}

/* ── FOOTER ── */
footer { padding: 40px 0; border-top: 1px solid var(--separator); }
footer .wrap {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 12px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}
footer a { color: var(--text-secondary); }
footer a:hover { color: var(--text); text-decoration: none; }

/* ── RESPONSIVE ── */
@media (max-width: 720px) {
  .three-beat { grid-template-columns: 1fr; }
  .privacy { grid-template-columns: 1fr; text-align: center; }
  .privacy svg { margin: 0 auto; }
  .tech-dl { grid-template-columns: 1fr; gap: 4px 0; }
  .tech-dl dt { margin-top: 12px; }
  .tech-dl dt:first-of-type { margin-top: 0; }
  .demo-controls { flex-wrap: wrap; }
  .demo-samples { margin-left: 0; width: 100%; justify-content: center; }
}

/* ── REDUCED MOTION ── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}