:root {
  --bg: #0e0d0c;
  --surface: #1a1816;
  --surface-2: #24211e;
  --text: #f3eee6;
  --muted: #a39a8e;
  --accent: #e8b44a;
  --accent-ink: #1a1305;
  --win: #7fc98f;
  --lose: #e7836f;
  --radius: 12px;
  /* How much the video is scaled up inside the frame. The overflow is clipped,
     which keeps YouTube's title bar and bottom overlays out of view. 1.34 fills
     a 16:9 frame with a 4:3 picture (the silent-era films) exactly. */
  --zoom: 1.34;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(ellipse at top, #1d1a16 0%, var(--bg) 60%);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

[hidden] { display: none !important; }

.app {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

h1 {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
}

h1::before { content: "🎞 "; }

.hud { display: flex; gap: 20px; color: var(--muted); }
.hud strong { color: var(--text); font-variant-numeric: tabular-nums; }

.lede { font-size: 1.2rem; margin: 0 0 12px; }
.rules { color: var(--muted); padding-left: 1.2em; margin: 0 0 24px; }
.muted { color: var(--muted); font-weight: normal; }
.best { color: var(--muted); }

/* ---------- frame ---------- */

.frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

.frame-inner {
  position: absolute;
  inset: 0;
  transform: scale(var(--zoom));
  transform-origin: center;
}

.frame-inner iframe,
#yt-host {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

/* Blocks hover and clicks so YouTube never shows its UI. */
.shield {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.curtain {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-items: center;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,0.02) 0 2px, transparent 2px 40px),
    linear-gradient(180deg, #5a1414, #2e0909);
  transition: opacity 0.5s ease;
}

.curtain.open { opacity: 0; pointer-events: none; }

.curtain-text {
  font-size: clamp(1.2rem, 4vw, 2rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #f3d9b0;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.timeline {
  position: relative;
  height: 6px;
  margin: 12px 0 20px;
  background: var(--surface-2);
  border-radius: 3px;
}

.timeline .mark {
  position: absolute;
  top: -3px;
  width: 4px;
  height: 12px;
  margin-left: -2px;
  background: var(--accent);
  border-radius: 2px;
}

/* ---------- panels & controls ---------- */

.panel {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
}

.field { display: grid; gap: 8px; margin-bottom: 16px; }
.field > span { font-weight: 600; }

.time {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  margin-left: 6px;
}

input:not([type]),
input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  font: inherit;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid #3a352f;
  border-radius: 8px;
}

input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

input[type="range"] { width: 100%; accent-color: var(--accent); }

.row { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }

.btn {
  padding: 10px 18px;
  font: inherit;
  font-weight: 600;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid #3a352f;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: 0.5; cursor: wait; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.ghost { background: transparent; }
.btn .cost { color: var(--lose); font-size: 0.85em; margin-left: 4px; }

.hint { color: var(--muted); font-size: 0.9rem; margin: 12px 0 0; }
.feedback { color: var(--lose); min-height: 1.5em; margin: -4px 0 12px; }

.verdict { margin: 0; font-weight: 600; }
.verdict.win { color: var(--win); }
.verdict.lose { color: var(--lose); }
.answer { margin: 4px 0 0; font-size: 1.8rem; }

.error {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 8px;
  background: #3a1a14;
  color: #f4c3b8;
}

/* ---------- end ---------- */

#screen-end { text-align: center; }
.big-score { font-size: 3rem; font-weight: 700; color: var(--accent); margin: 0 0 16px; }
.recap { display: inline-block; text-align: left; color: var(--muted); margin: 0 0 24px; }

@media (max-width: 520px) {
  .row { justify-content: stretch; }
  .row .btn { flex: 1 1 auto; text-align: center; }
  .panel { padding: 16px; }
  h1 { font-size: 1.3rem; }
}