/* Noir de la salle de projection, rouge du carré de Malévitch : les couleurs de la présentation.
   Même mise en page que l'exercice de découpage : bande-film en tête, puis une carte par question. */
:root {
  --bg: #000;
  --surface: #121212;
  --surface-2: #1b1b1b;
  --line: #2e2e2e;
  --fg: #f3f3f3;
  --muted: #a3a3a3;
  --accent: #ef4a3c;      /* texte rouge sur fond noir */
  --accent-btn: #d63426;  /* fond des boutons, texte blanc */
  --accent-ink: #fff;
  --good: #5cc08a;
  --bad: #ff8a3d;
  --near: #e8c547;

  --f-display: "Big Shoulders Display", "Oswald", "Arial Narrow", sans-serif;
  --f-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --radius: 6px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { background: var(--bg); color: var(--fg); }
body {
  margin: 0;
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.55;
  padding-inline: 16px;
  padding-block: 0 4rem;
}
img { max-width: 100%; display: block; }
h1, h2, h3 { font-family: var(--f-display); font-weight: 800; letter-spacing: .01em; text-wrap: balance; margin: 0; line-height: 1.02; }
p { margin: 0; }
button, select, input { font: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { max-width: 1080px; margin-inline: auto; }

/* ---------- barre de score ---------- */
.topbar {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
  margin-inline: -16px; padding: .6rem 16px;
}
.topbar .wrap { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.brand { font-family: var(--f-mono); font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); flex: 1 1 14rem; min-width: 0; display: flex; align-items: center; gap: .55rem; }
.brand::before { content: ""; width: .7rem; height: .7rem; background: var(--accent); flex: none; }
.brand b { color: var(--fg); font-weight: 600; }
.score {
  font-family: var(--f-mono); font-variant-numeric: tabular-nums;
  display: flex; align-items: baseline; gap: .35rem;
}
.score strong { font-family: var(--f-display); font-size: 1.9rem; color: var(--accent); line-height: 1; }
.score span { color: var(--muted); font-size: .85rem; }

/* ---------- en-tête ---------- */
header.intro { padding-block: 2.5rem 1.5rem; display: grid; gap: .9rem; }
.eyebrow { font-family: var(--f-mono); font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
header.intro h1 { font-size: clamp(2.6rem, 7vw, 4.6rem); text-transform: uppercase; }
header.intro p { color: var(--muted); max-width: 64ch; }
header.intro p em { color: var(--fg); }

/* bande-film décorative avec perforations */
.strip {
  overflow-x: auto; background: #0b0b0b; border-radius: var(--radius);
  padding: 14px 10px; position: relative;
}
.strip-inner { display: flex; gap: 8px; width: max-content; position: relative; padding-block: 2px; }
.strip::before, .strip::after {
  content: ""; position: absolute; left: 0; right: 0; height: 8px;
  background-image: linear-gradient(90deg, #2f2f2f 0 10px, transparent 10px 18px);
  background-size: 18px 8px;
}
.strip::before { top: 3px; }
.strip::after { bottom: 3px; }
.strip img { width: 104px; height: 104px; object-fit: cover; border-radius: 2px; opacity: .8; }
.controls { display: flex; gap: .6rem; flex-wrap: wrap; align-items: center; margin-top: .25rem; }
.controls .hint { color: var(--muted); font-size: .85rem; flex: 1 1 16rem; min-width: 0; }

/* ---------- boutons ---------- */
.btn {
  border: 1px solid var(--line); background: var(--surface-2); color: var(--fg);
  padding: .55rem 1rem; border-radius: var(--radius); cursor: pointer; font-weight: 500;
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent-btn); border-color: var(--accent-btn); color: var(--accent-ink); font-weight: 600; }
.btn.primary:hover { filter: brightness(1.08); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- consignes ---------- */
section.block { padding-block: 2.5rem 0; display: grid; gap: 1rem; }
section.block > h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); text-transform: uppercase; }
.rules { display: grid; gap: .5rem; color: var(--muted); max-width: 72ch; margin: 0; padding-left: 1.3rem; }
.rules strong { color: var(--fg); }

/* ---------- progression ---------- */
.progress { display: flex; gap: 6px; flex-wrap: wrap; scroll-margin-top: 4.5rem; }
.progress button {
  width: 2.2rem; height: 2.2rem; border-radius: 50%; border: 1px solid var(--line);
  background: var(--surface); color: var(--muted); font-family: var(--f-mono); font-size: .8rem; cursor: pointer;
  font-variant-numeric: tabular-nums;
}
.progress button[aria-current="step"] { border-color: var(--accent); color: var(--accent); }
.progress button.done { background: var(--surface-2); color: var(--fg); }
.progress button.ok { border-color: var(--good); }
.progress button.mid { border-color: var(--near); }
.progress button.ko { border-color: var(--bad); }
.progress button:disabled { cursor: default; opacity: .5; }

/* ---------- carte question ---------- */
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  padding: clamp(1rem, 3vw, 1.75rem); display: grid; gap: 1.4rem;
}
.card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; }
.card-head h3 { font-size: 2rem; text-transform: uppercase; }
.card-head h3 small { font-family: var(--f-mono); font-size: .8rem; color: var(--muted); font-weight: 400; margin-left: .6rem; letter-spacing: .04em; text-transform: none; }

.figs { display: grid; gap: 1rem; }
.figs.n2 { grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: end; }
.fig { margin: 0; display: grid; gap: .4rem; min-width: 0; }
.fig img {
  width: 100%; max-height: 420px; object-fit: contain; background: #000;
  border-radius: 4px; cursor: zoom-in;
}
.fig figcaption { font-family: var(--f-mono); font-size: .75rem; color: var(--muted); }
.fig figcaption em { color: var(--fg); font-style: italic; }

fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: .6rem; min-width: 0; }
legend { font-weight: 600; font-size: 1.1rem; padding: 0; margin-bottom: .7rem; max-width: 70ch; }
legend .pts { display: block; font-family: var(--f-mono); font-weight: 400; font-size: .75rem; color: var(--muted); margin-top: .25rem; }
.answers.single, .answers.multi { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.answers legend { grid-column: 1 / -1; }

.opt {
  display: grid; grid-template-columns: 1.2rem minmax(0, 1fr); gap: .6rem; align-items: start;
  padding: .6rem .75rem; border: 1px solid var(--line); border-radius: var(--radius); cursor: pointer;
  background: var(--surface-2);
}
.opt:hover { border-color: #4a4a4a; }
.opt input { margin: .25rem 0 0; accent-color: var(--accent-btn); width: 1rem; height: 1rem; }
.opt .mark { grid-column: 2; font-family: var(--f-mono); font-size: .75rem; }
.opt .mark:empty { display: none; }
.opt.right { border-color: var(--good); }
.opt.wrong { border-color: var(--bad); }
.opt.missed { border-style: dashed; border-color: var(--good); }
.mark.r { color: var(--good); }
.mark.w { color: var(--bad); }
.mark.m { color: var(--good); opacity: .85; }

/* associations */
.rows { display: grid; gap: .6rem; }
.row {
  display: grid; grid-template-columns: 96px minmax(0, 1fr) minmax(0, 1.25fr); gap: .9rem; align-items: center;
  padding: .55rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-2);
}
.row .thumb { width: 96px; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 3px; cursor: zoom-in; }
.row-label { font-size: .95rem; }
.row-label em { font-style: italic; }
.row-ctl { display: grid; gap: .3rem; min-width: 0; }
.row .mark { font-family: var(--f-mono); font-size: .75rem; }
.row .mark:empty { display: none; }
.row.right { border-color: var(--good); }
.row.wrong { border-color: var(--bad); }
select {
  width: 100%; padding: .55rem .65rem; background: var(--surface); color: var(--fg);
  border: 1px solid var(--line); border-radius: var(--radius);
}
select.right { border-color: var(--good); }
select.wrong { border-color: var(--bad); }
select.missing { border-color: var(--near); }

.need { color: var(--near); font-size: .9rem; }

.feedback { border-top: 1px solid var(--line); padding-top: 1.1rem; display: grid; gap: .7rem; }
.verdict { display: flex; gap: .8rem; align-items: baseline; flex-wrap: wrap; }
.verdict .gain { font-family: var(--f-display); font-size: 1.8rem; color: var(--accent); }
.verdict .line { color: var(--muted); }
.verdict .line b { color: var(--fg); }
.explain { max-width: 72ch; }
.explain strong { color: var(--accent); font-weight: 600; }

.actions { display: flex; gap: .6rem; flex-wrap: wrap; justify-content: flex-end; }

/* ---------- bilan ---------- */
.result { display: grid; gap: 1.25rem; }
.big { font-family: var(--f-display); font-size: clamp(3.5rem, 12vw, 6rem); color: var(--accent); line-height: .9; font-variant-numeric: tabular-nums; }
.big small { font-size: .4em; color: var(--muted); }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { text-align: left; padding: .5rem .6rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-family: var(--f-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
td.num { font-family: var(--f-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
td.part { color: var(--muted); font-size: .8rem; white-space: nowrap; }
tr.ok td:last-child { color: var(--good); }
tr.mid td:last-child { color: var(--near); }
tr.ko td:last-child { color: var(--bad); }
.link { background: none; border: 0; padding: 0; color: var(--fg); text-decoration: underline; text-decoration-color: var(--line); text-underline-offset: 3px; cursor: pointer; text-align: left; }
.link:hover { text-decoration-color: var(--accent); }

/* ---------- loupe ---------- */
.lightbox {
  position: fixed; inset: 0; background: rgba(0,0,0,.94); display: grid; place-items: center; z-index: 50; padding: 16px; cursor: zoom-out;
}
.lightbox img { max-height: 90vh; width: auto; }

footer { padding-block: 3rem 0; color: var(--muted); font-size: .8rem; display: grid; gap: .3rem; max-width: 80ch; }

@media (max-width: 720px) {
  .brand .long { display: none; }
  .answers.single, .answers.multi { grid-template-columns: minmax(0, 1fr); }
  .figs.n2 { grid-template-columns: minmax(0, 1fr); }
  .row { grid-template-columns: 72px minmax(0, 1fr); }
  .row .thumb { width: 72px; }
  .row-ctl { grid-column: 1 / -1; }
  .strip img { width: 84px; height: 84px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

/* lien retour vers le site du cours */
.brand a.back { color: var(--fg); text-decoration: none; font-weight: 600; }
.brand a.back:hover { color: var(--accent); }