/* studiwize — shared brand foundation
   Type: Sora (display/wordmark), DM Sans (UI/body), DM Mono (technical labels)
   Light-led, warm-neutral paper base, deep navy-slate ink, one teal accent.
   Fonts loaded non-blocking via <link> preconnect in index.html — no @import here. */

:root {
  /* fonts — committed production defaults */
  --font-display: 'Sora', system-ui, sans-serif;
  --font-ui:      'DM Sans', system-ui, sans-serif;
  --font-mono:    'DM Mono', ui-monospace, monospace;

  /* shapes — committed defaults (accent/radius previously tweakable via dev panel) */
  --radius:   16px;
  --radius-lg: 24px;

  /* surfaces */
  --paper:    #F4F1EA;   /* warm off-white base */
  --paper-2:  #FBF9F4;   /* raised card */
  --paper-3:  #FFFFFF;   /* pure card */

  /* ink */
  --ink:    #15212C;     /* deep navy-slate — primary text + brand */
  --ink-80: #2A3742;
  --ink-2:  #54616B;     /* secondary text */
  --ink-3:  #8B959C;     /* faint / captions */
  --line:   rgba(21, 33, 44, 0.10);
  --line-2: rgba(21, 33, 44, 0.16);

  /* accent — teal */
  --accent:      #10B3A2;   /* play / primary CTA */
  --accent-deep: #0A786E;   /* accent text on light */
  --on-accent:   #052420;   /* text on accent fills */

  /* dark surfaces (audio player / night) */
  --night:    #0E1822;
  --night-2:  #16242F;
  --night-3:  #1E2F3B;
  --night-line: rgba(255,255,255,0.10);
  --paper-on-night: #EAF0F2;
  --ink-2-on-night: #9DAAB2;

  --shadow-sm: 0 1px 2px rgba(21,33,44,.05), 0 2px 8px rgba(21,33,44,.04);
  --shadow-md: 0 2px 6px rgba(21,33,44,.06), 0 14px 38px rgba(21,33,44,.09);
  --shadow-lg: 0 30px 70px rgba(21,33,44,.16), 0 8px 24px rgba(21,33,44,.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ── type scale ─────────────────────────────────────────── */
.display {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.02;
}
.eyebrow {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.stat-label {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ── wordmark ───────────────────────────────────────────── */
.wm {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-display);
  color: var(--ink);
  text-decoration: none;
  line-height: 1;
}
.wm-text {
  font-weight: 600;
  letter-spacing: -0.035em;
  font-size: 1.5em;
}
.wm-text b { font-weight: 700; }
.wm-text .accent { color: var(--accent-deep); }

/* ── app icon mark (squircle: page spine + play) ────────── */
/* Inner shapes are injected as inline SVG (see injectMarks) so they render
   reliably in browsers, html-to-image captures, and PDF/PPTX exports. */
.mark {
  --m: 1em;
  width: var(--m);
  height: var(--m);
  border-radius: 25%;
  background: var(--ink);
  position: relative;
  flex: none;
  display: inline-block;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04);
}
.mark svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.mark .mk-spine { fill: rgba(255,255,255,0.30); }
.mark .mk-play  { fill: var(--accent); }

/* ── shared buttons ─────────────────────────────────────── */
.btn {
  appearance: none;
  border: 0;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 16px;
  border-radius: 12px;
  padding: 14px 22px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  transition: transform .15s cubic-bezier(.3,.7,.4,1), background .15s, box-shadow .2s, border-color .15s;
  text-decoration: none;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: 0 1px 2px rgba(5,36,32,.18), 0 8px 22px color-mix(in oklab, var(--accent) 38%, transparent);
}
.btn-primary:hover { background: color-mix(in oklab, var(--accent) 92%, #000); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--line-2);
}
.btn-ghost:hover { border-color: var(--ink); background: rgba(21,33,44,0.03); }
.btn-dark {
  background: var(--ink);
  color: var(--paper);
}
.btn-dark:hover { background: var(--ink-80); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}