/* styles.css — single-file CSS for the live-vs-studio demo.
 * No framework. System fonts. Designed to be readable, calm, and accessible:
 *   - WCAG AA contrast throughout
 *   - keyboard-navigable dropzone
 *   - works without JS up through "drop a file" (JS handles the rest)
 *   - respects prefers-color-scheme for dark/light
 */

:root {
  --bg: #fafaf7;
  --fg: #1a1a1a;
  --fg-dim: #555;
  --accent: #2563eb;      /* default brand */
  --accent-dim: #dbeafe;
  --live: #2563eb;        /* blue — calmer than red/green */
  --studio: #d97706;      /* amber — neutral pair to blue */
  --border: #d4d4d4;
  --border-strong: #888;
  --error: #b91c1c;
  --error-bg: #fef2f2;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 12px rgba(0,0,0,.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a1a;
    --fg: #f5f5f5;
    --fg-dim: #aaa;
    --accent-dim: #1e3a8a;
    --border: #3a3a3a;
    --border-strong: #666;
    --error: #fca5a5;
    --error-bg: #2c1717;
    --shadow: 0 1px 3px rgba(0,0,0,.4), 0 4px 12px rgba(0,0,0,.3);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

header h1 {
  font-size: 2.2rem;
  margin: 0 0 .5rem;
  letter-spacing: -.02em;
}

header .tagline {
  font-size: 1.05rem;
  margin: 0 0 1rem;
  color: var(--fg);
}

header .hint {
  font-size: .85rem;
  color: var(--fg-dim);
  margin: 1rem 0 0;
}

em { font-style: normal; font-weight: 600; color: var(--accent); }

/* --- Dropzone --- */
#dropzone {
  margin: 2rem 0 1rem;
  padding: 3rem 1.5rem;
  background: var(--bg);
  border: 2px dashed var(--border-strong);
  border-radius: 14px;
  text-align: center;
  cursor: pointer;
  transition: background .15s, border-color .15s;
  outline: none;
}
#dropzone:hover,
#dropzone:focus-visible,
#dropzone.drag-active {
  background: var(--accent-dim);
  border-color: var(--accent);
}
#dropzone:focus-visible {
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.dropzone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .75rem;
}
.dropzone-icon { font-size: 2.5rem; }
.dropzone-text strong { display: block; font-size: 1.15rem; }
.dropzone-text span { display: block; font-size: .9rem; color: var(--fg-dim); margin-top: .25rem; }

/* --- Stage / progress ---
 *
 * The progress bar measures the WHOLE pipeline (decode -> windows ->
 * [download] -> inference), not per task. Wall-clock-weighted segments are
 * assigned in app.js:planSegments(). The visual goal is to feel alive even
 * during a 1-2 s slice where the fill width isn't moving: the bar is tall
 * (12 px) and a CSS shimmer slides across the filled portion continuously.
 *
 * We also bump the stage label size while the bar is visible so the user
 * has something prominent to read.
 */
.stage-label {
  text-align: center;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--fg);
  margin: 1.25rem 0 .6rem;
  min-height: 1.4em;
  letter-spacing: -.005em;
}
.progress-bar {
  position: relative;
  height: 12px;
  background: var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin: 0 0 1.25rem;
  box-shadow: inset 0 1px 2px rgba(0,0,0,.08);
}
.progress-fill {
  height: 100%;
  width: 0;
  background: var(--accent);
  border-radius: 6px;
  transition: width .35s ease-out;
}
/* NO SHIMMER ANIMATION.
 *
 * We experimented with a CSS shimmer (background-position, then transform)
 * to convey "still working" during the 1-2 s synchronous WASM inference
 * calls. Both approaches froze: WASM blocks the main thread, which blocks
 * style/layout/paint, and Chrome doesn't reliably keep transform animations
 * running on the compositor for ::after pseudo-elements while the main
 * thread is unresponsive. A frozen shimmer is worse than no shimmer — it
 * actively signals "something is broken."
 *
 * Instead we give the user real information: the label includes a countdown
 * estimate ("…about 4s left"), and the bar advances cleanly between windows.
 * The honest answer to "is something happening" is: yes, but the math is
 * intense and the browser pauses while it runs. */

.stage-sub {
  font-size: .85rem;
  font-weight: 400;
  color: var(--fg-dim);
  margin-left: .4rem;
}

/* --- Error --- */
.error-box {
  background: var(--error-bg);
  color: var(--error);
  padding: .75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--error);
  font-size: .95rem;
  margin: 1rem 0;
}

/* --- Results --- */
.results {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.file-name {
  font-size: .85rem;
  color: var(--fg-dim);
  margin-bottom: .5rem;
  word-break: break-all;
}
.verdict {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: .5rem;
}
.verdict-label {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -.02em;
}
.verdict-label[data-label="live"]   { color: var(--live); }
.verdict-label[data-label="studio"] { color: var(--studio); }
.verdict-detail {
  font-size: 1rem;
  color: var(--fg-dim);
}
.window-info {
  font-size: .85rem;
  color: var(--fg-dim);
  margin: 1rem 0 .75rem;
}

/* --- Per-window cards --- */
.windows {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: .75rem;
}
.window-card {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
}
.window-title {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--fg-dim);
}
.window-label {
  font-size: 1.25rem;
  font-weight: 700;
  margin: .3rem 0 .5rem;
}
.window-live .window-label   { color: var(--live); }
.window-studio .window-label { color: var(--studio); }
.window-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: .35rem;
}
.window-bar-fill {
  height: 100%;
  background: var(--live);
  transition: width .3s;
}
.window-studio .window-bar-fill {
  background: var(--studio);
}
.window-prob {
  font-size: .85rem;
  color: var(--fg-dim);
}

/* --- Methodology --- */
.methodology {
  margin: 3rem 0 0;
  padding: 0;
}
.methodology details {
  border-top: 1px solid var(--border);
  padding: 1rem 0;
}
.methodology summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--fg);
  list-style-position: inside;
}
.methodology details[open] summary {
  margin-bottom: .75rem;
}
.methodology p,
.methodology ol {
  font-size: .95rem;
  color: var(--fg);
  margin: .5rem 0;
}
.methodology a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

/* --- Footer --- */
footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: .85rem;
  color: var(--fg-dim);
  text-align: center;
}
footer a {
  color: var(--fg-dim);
  text-decoration: underline;
}

/* --- Utility --- */
.hidden { display: none !important; }