:root {
  --paper: #eff3f2;
  --card: #ffffff;
  --ink: #0f2831;
  --muted: #4d646c;
  --line: #d3dcdb;
  --accent: #0a7570;
  --accent-ink: #055652;
  --accent-soft: #d8ece9;
  --rung-off: #d3dcdb;
  --warn-ink: #7a4d00;
  --warn-bg: #fdf0cd;
  --focus: #1b5fd1;
  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --sans: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0d1c22;
    --card: #14272f;
    --ink: #e6efee;
    --muted: #9db3b8;
    --line: #28404a;
    --accent: #4fc2ba;
    --accent-ink: #8adbd4;
    --accent-soft: #17383c;
    --rung-off: #2c4650;
    --warn-ink: #f3d58a;
    --warn-bg: #3a2f12;
    --focus: #8db6ff;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1rem/1.55 var(--sans);
}
.wrap { width: min(100% - 2rem, 62rem); margin-inline: auto; }
.sr, .skip:not(:focus) { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip:focus { position: fixed; top: .5rem; left: .5rem; z-index: 10; background: var(--card); padding: .5rem .75rem; border-radius: .4rem; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
button, select, input { font: inherit; color: inherit; }
button { cursor: pointer; }

/* en-tête */
.top { border-bottom: 1px solid var(--line); background: var(--card); }
.top-row { display: flex; align-items: center; justify-content: space-between; padding-block: .7rem; }
.brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--accent-ink); text-decoration: none; font: 600 1.35rem/1 var(--serif); }
.langs { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 2px; }
.langs button { border: 0; background: none; padding: .3rem .8rem; border-radius: 999px; color: var(--muted); }
.langs button[aria-pressed="true"] { background: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .langs button[aria-pressed="true"] { color: #05211f; } }

/* introduction */
.intro { padding-block: 2.5rem 1.25rem; }
h1 { font: 500 clamp(1.9rem, 4.5vw, 2.9rem)/1.1 var(--serif); letter-spacing: -.01em; margin: 0 0 .75rem; max-width: 26ch; text-wrap: balance; }
.lede { margin: 0 0 1.5rem; max-width: 58ch; color: var(--muted); font-size: 1.05rem; }
.levels { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1rem; }
.levels-label { font-weight: 600; }
.seg { display: inline-flex; flex-wrap: wrap; gap: .5rem; }
.seg button {
  display: grid; text-align: left; gap: .1rem; min-width: 11rem;
  padding: .6rem .9rem; border-radius: .6rem;
  background: var(--card); border: 1.5px solid var(--line);
}
.seg button b { font-weight: 600; }
.seg button small { color: var(--muted); font-size: .8rem; line-height: 1.25; }
.seg button[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }

/* bannière démo */
.demo { margin-block: 1rem; }
.demo p { margin: 0; padding: .7rem .9rem; border-radius: .5rem; background: var(--warn-bg); color: var(--warn-ink); font-size: .92rem; }

/* filtres */
.tools { padding-block: 1.25rem .5rem; }
.tools-row { display: flex; flex-wrap: wrap; gap: .75rem; align-items: end; }
.search { flex: 1 1 16rem; }
.search input { width: 100%; padding: .65rem .85rem; border-radius: .5rem; border: 1.5px solid var(--line); background: var(--card); }
.select { display: grid; gap: .2rem; font-size: .82rem; color: var(--muted); }
.select select { padding: .6rem .7rem; border-radius: .5rem; border: 1.5px solid var(--line); background: var(--card); font-size: 1rem; color: var(--ink); }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .9rem; }
.chip { border: 1.5px solid var(--line); background: var(--card); border-radius: 999px; padding: .3rem .75rem; font-size: .9rem; }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.chip span { color: var(--muted); margin-left: .25rem; font-size: .8rem; }
.chip[aria-pressed="true"] span { color: inherit; opacity: .75; }

/* liste */
.feed-wrap { padding-block: .5rem 3rem; }
.count { color: var(--muted); font-size: .9rem; margin: 1rem 0 .75rem; }
.feed { display: grid; gap: 1rem; }
.card {
  display: grid; grid-template-columns: 5.5rem 1fr; gap: 1.25rem;
  background: var(--card); border: 1px solid var(--line); border-radius: .75rem;
  padding: 1.25rem 1.4rem 1.25rem 1.1rem;
}
.card.is-demo { border-style: dashed; }

/* échelle de preuve */
.ladder { display: grid; align-content: start; gap: .35rem; }
.rungs { display: grid; gap: 3px; grid-auto-rows: .5rem; }
.rungs i { display: block; border-radius: 2px; background: var(--rung-off); }
.rungs i.on { background: var(--accent); }
.ladder-name { font-size: .78rem; line-height: 1.25; color: var(--muted); font-weight: 500; }

.meta { display: flex; flex-wrap: wrap; gap: .1rem 1rem; font-size: .85rem; color: var(--muted); margin-bottom: .35rem; }
.meta .journal { font-weight: 600; color: var(--ink); }
.card h3 { font: 500 1.28rem/1.25 var(--serif); margin: 0 0 .7rem; text-wrap: balance; }
.plain { margin: 0 0 .75rem; max-width: 66ch; font-family: var(--serif); font-size: 1.08rem; line-height: 1.55; }
.detail { margin: 0 0 .75rem; display: grid; gap: .35rem; max-width: 66ch; }
.detail div { display: grid; grid-template-columns: 6.5rem 1fr; gap: .75rem; font-size: .95rem; }
.detail dt { color: var(--muted); font-weight: 600; }
.detail dd { margin: 0; }
.tags { display: flex; flex-wrap: wrap; gap: .35rem; margin: 0 0 .85rem; padding: 0; list-style: none; }
.tags li { font-size: .8rem; padding: .1rem .55rem; border-radius: 999px; background: var(--accent-soft); color: var(--accent-ink); }
.tags li.warn { background: var(--warn-bg); color: var(--warn-ink); }

.checks { display: flex; flex-wrap: wrap; gap: .25rem 1rem; font-size: .82rem; color: var(--muted); margin: 0 0 .9rem; padding: 0; list-style: none; }
.checks li { display: inline-flex; align-items: center; gap: .3rem; }
.checks svg { color: var(--accent); flex: none; }
.checks li.no svg { color: var(--muted); }

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1rem; }
.btn, .src {
  display: inline-block; text-decoration: none; font-weight: 600; font-size: .92rem;
  padding: .5rem .9rem; border-radius: .5rem; border: 1.5px solid var(--accent); color: var(--accent-ink); background: none;
}
.btn.primary, .src.primary { background: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primary, .src.primary { color: #05211f; } }
.src[aria-disabled="true"] { border-color: var(--line); color: var(--muted); pointer-events: none; }
.ai-note { font-size: .78rem; color: var(--muted); margin: .8rem 0 0; max-width: 66ch; }

.empty { text-align: left; padding: 2rem 0; }

/* méthode */
.method { padding-block: 2.5rem 3rem; border-top: 1px solid var(--line); }
.method h2 { font: 500 1.6rem/1.2 var(--serif); margin: 0 0 1.25rem; }
.method-grid { display: grid; gap: 1.25rem 2rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.method-grid h3 { margin: 0 0 .25rem; font-size: 1rem; }
.method-grid p { margin: 0; color: var(--muted); font-size: .94rem; }
.disclaimer { margin: 1.75rem 0 0; padding: .9rem 1rem; border-left: 4px solid var(--warn-ink); background: var(--warn-bg); color: var(--warn-ink); font-size: .92rem; max-width: 70ch; }

.foot { border-top: 1px solid var(--line); padding-block: 1.5rem; color: var(--muted); font-size: .85rem; }
.foot p { margin: 0 0 .3rem; }

@media (max-width: 40rem) {
  .card { grid-template-columns: 1fr; gap: .75rem; padding: 1rem; }
  .ladder { grid-auto-flow: column; justify-content: start; align-items: center; gap: .75rem; }
  .rungs { grid-auto-flow: column; grid-auto-rows: auto; grid-auto-columns: 1.1rem; }
  .rungs i { height: .5rem; }
  .detail div { grid-template-columns: 1fr; gap: 0; }
  .seg button { min-width: 0; flex: 1 1 100%; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }