:root {
  color-scheme: light;
  --bg: #f8f5f7; --surface: #ffffff; --surface-2: #f2edf0; --border: #e6dde2;
  --text: #1c181a; --text-2: #55494f; --muted: #8c7f86;
  --accent: #c2286d; --accent-soft: #fbe6ef; --accent-ink: #ffffff; --accent-2: #e6568f;
  --good: #1f8a4c; --good-soft: #e3f4ea; --warn: #b26b00; --warn-soft: #fbefd9; --bad: #c43d3c; --bad-soft: #fbe6e5;
  --radius: 14px; --shadow: 0 1px 2px rgba(0,0,0,.04), 0 4px 16px rgba(0,0,0,.04);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #141113; --surface: #1c181a; --surface-2: #262124; --border: #332c30;
    --text: #f6f1f4; --text-2: #c9bcc3; --muted: #8f848a;
    --accent: #ec6aa3; --accent-soft: #3a2230; --accent-ink: #141113; --accent-2: #c2286d;
    --good: #4cc07c; --good-soft: #17301f; --warn: #e0a640; --warn-soft: #33270f; --bad: #e66767; --bad-soft: #3a1b1b;
    --shadow: none;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #141113; --surface: #1c181a; --surface-2: #262124; --border: #332c30;
  --text: #f6f1f4; --text-2: #c9bcc3; --muted: #8f848a;
  --accent: #ec6aa3; --accent-soft: #3a2230; --accent-ink: #141113; --accent-2: #c2286d;
  --good: #4cc07c; --good-soft: #17301f; --warn: #e0a640; --warn-soft: #33270f; --bad: #e66767; --bad-soft: #3a1b1b;
  --shadow: none;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif; font-size: 16px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
button, input, select { font: inherit; color: inherit; }

.wrap { max-width: 880px; margin: 0 auto; padding: 16px 16px 64px; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; max-width: 880px; margin: 0 auto; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.01em; }
.brand .logo { width: 34px; height: 34px; border-radius: 10px; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font-weight: 800; }
.brand small { display: block; font-weight: 500; color: var(--muted); font-size: 12px; margin-top: -2px; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav button { border: 0; background: transparent; padding: 8px 12px; border-radius: 999px; cursor: pointer; color: var(--text-2); }
.nav button.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

h1 { font-size: 26px; letter-spacing: -.02em; margin: 8px 0 4px; line-height: 1.2; }
h2 { font-size: 18px; margin: 0 0 12px; letter-spacing: -.01em; }
.sub { color: var(--text-2); margin: 0 0 16px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.mt { margin-top: 16px; } .mt-s { margin-top: 8px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.stack > * + * { margin-top: 16px; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 600px) { .g3 { grid-template-columns: minmax(0,1fr); } }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--border); background: var(--surface); padding: 10px 18px; border-radius: 999px; cursor: pointer; font-weight: 600; transition: transform .05s ease, background .15s; }
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.big { padding: 14px 26px; font-size: 17px; }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.small { padding: 6px 12px; font-size: 14px; }
.btn:disabled { opacity: .5; cursor: default; }

.input { width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); outline: none; font-size: 17px; }
.input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.input.ok { border-color: var(--good); background: var(--good-soft); }
.input.ko { border-color: var(--bad); background: var(--bad-soft); }
label.lbl { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 4px; font-weight: 600; }

/* Login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login .card { width: 100%; max-width: 420px; }
.who { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 16px 0; }
.who button { border: 1px solid var(--border); background: var(--surface); padding: 16px; border-radius: 12px; cursor: pointer; text-align: left; }
.who button.on { border-color: var(--accent); background: var(--accent-soft); }
.who b { display: block; }
.err { color: var(--bad); font-size: 14px; margin-top: 8px; }

/* Fil d'Ariane */
.crumbs { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; font-size: 14px; color: var(--text-2); margin-bottom: 10px; }
.crumbs button { border: 0; background: transparent; color: var(--accent); cursor: pointer; padding: 2px 4px; font-weight: 600; }
.crumbs span.sep { color: var(--muted); }

/* Tuiles de navigation */
.tile { text-align: left; border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius); padding: 18px; cursor: pointer; transition: border-color .15s, transform .1s; box-shadow: var(--shadow); }
.tile:hover { border-color: var(--accent); transform: translateY(-1px); }
.tile .ic { font-size: 28px; }
.tile b { display: block; margin-top: 6px; font-size: 17px; }
.tile span { font-size: 13px; color: var(--text-2); display: block; }
.tile .bar { height: 6px; background: var(--surface-2); border-radius: 99px; overflow: hidden; margin-top: 10px; }
.tile .bar > i { display: block; height: 100%; background: var(--accent); }

.hero { background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%); color: #fff; border: 0; }
.hero .muted { color: rgba(255,255,255,.85); }
.hero h1 { margin-top: 0; }

/* Modes d'exercice */
.modes { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.mode { text-align: left; border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius); padding: 16px; cursor: pointer; }
.mode:hover { border-color: var(--accent); }
.mode .ic { font-size: 24px; }
.mode b { display: block; margin-top: 6px; }
.mode span { font-size: 13px; color: var(--text-2); }

.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { border: 1px solid var(--border); background: var(--surface); padding: 6px 12px; border-radius: 999px; cursor: pointer; font-size: 14px; }
.chip.on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); font-weight: 600; }

.steps { display: flex; gap: 4px; margin-bottom: 14px; }
.steps i { flex: 1; height: 5px; border-radius: 4px; background: var(--surface-2); }
.steps i.ok { background: var(--good); } .steps i.ko { background: var(--bad); } .steps i.cur { background: var(--accent); }

.flash { text-align: center; padding: 26px 12px; min-height: 180px; display: flex; flex-direction: column; justify-content: center; }
.flash .w { font-size: 34px; font-weight: 750; letter-spacing: -.01em; }
.flash .fr { font-size: 22px; margin-top: 12px; color: var(--accent); font-weight: 600; }
.flash .hint { font-size: 14px; color: var(--muted); margin-top: 8px; font-style: italic; }
.flash .cat { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 700; margin-bottom: 10px; }
.grade2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.grade2 .btn { padding: 16px; font-size: 17px; border-radius: 14px; }

.opts { display: grid; gap: 8px; margin-top: 12px; }
.opt { text-align: left; border: 1px solid var(--border); background: var(--surface); padding: 14px 16px; border-radius: 12px; cursor: pointer; font-size: 17px; }
.opt:hover { border-color: var(--accent); }
.opt.ok { border-color: var(--good); background: var(--good-soft); }
.opt.ko { border-color: var(--bad); background: var(--bad-soft); }
.opt:disabled { cursor: default; }

.feedback { margin-top: 12px; padding: 12px 14px; border-radius: 10px; font-size: 15px; }
.feedback.ok { background: var(--good-soft); color: var(--good); }
.feedback.ko { background: var(--bad-soft); color: var(--bad); }

.result-score { font-size: 56px; font-weight: 800; letter-spacing: -.03em; line-height: 1; }
.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px; }
.pill.good { background: var(--good-soft); color: var(--good); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }
.pill.bad { background: var(--bad-soft); color: var(--bad); }
.pill.neutral { background: var(--surface-2); color: var(--text-2); }

table.t { width: 100%; border-collapse: collapse; font-size: 14px; }
table.t th { text-align: left; font-size: 12px; color: var(--muted); font-weight: 600; padding: 6px 8px; border-bottom: 1px solid var(--border); }
table.t td { padding: 8px; border-bottom: 1px solid var(--border); font-variant-numeric: tabular-nums; }
.scroll-x { overflow-x: auto; }
.kv { padding: 14px; }
.kv .k { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.kv .v { font-size: 28px; font-weight: 750; letter-spacing: -.02em; line-height: 1.1; margin-top: 4px; }
.kv .d { font-size: 13px; color: var(--text-2); margin-top: 4px; }

.list { display: grid; gap: 6px; }
.list .it { display: flex; justify-content: space-between; gap: 12px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.list .it b { font-weight: 650; }
.list .it .fr { color: var(--text-2); }
.note { font-size: 13px; color: var(--text-2); background: var(--surface-2); padding: 10px 12px; border-radius: 10px; }

@media (max-width: 600px) {
  .topbar { flex-direction: column; align-items: flex-start; gap: 6px; }
  .nav button { padding: 6px 10px; font-size: 14px; }
  h1 { font-size: 22px; }
  .card { padding: 16px; }
  .flash .w { font-size: 28px; }
}