:root {
  --bg: #f4f6f9; --card: #ffffff; --text: #1c2430; --muted: #66727f; --line: #e1e6ec;
  --accent: #2d5bd1; --accent-soft: #e8eefc;
  --ok: #1f9d55; --ok-soft: #e3f5ea; --mid: #e08a00; --mid-soft: #fdf1dc; --ko: #d64545; --ko-soft: #fbe6e6; --na: #9aa5b1; --na-soft: #eef1f4;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif; background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.5; }
.app { display: flex; min-height: 100vh; }
.side { width: 250px; flex: none; background: #14213d; color: #dfe6f3; padding: 18px 14px; position: sticky; top: 0; height: 100vh; overflow-y: auto; display: flex; flex-direction: column; }
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 8px 18px; }
.brand svg { flex: none; }
.brand b { display: block; font-size: 15px; color: #fff; line-height: 1.2; }
.brand small { color: #9fb0cc; font-size: 12px; }
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav button { all: unset; box-sizing: border-box; cursor: pointer; display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 8px; color: #c5d0e4; font-size: 14.5px; width: 100%; }
.nav button:hover { background: rgba(255,255,255,.07); }
.nav button .dot { width: 8px; height: 8px; border-radius: 50%; background: transparent; flex: none; }
.nav button.on { color: #fff; font-weight: 600; background: rgba(255,255,255,.1); }
.nav button.on .dot { background: #5ee0a0; }
.side .foot { margin-top: auto; padding: 14px 8px 0; font-size: 12px; color: #8ea0bf; }
.main { flex: 1; min-width: 0; padding: 28px 24px 60px; }
.page { max-width: 980px; margin: 0 auto; }
h1 { font-size: 26px; margin: 0 0 4px; }
h2 { font-size: 19px; margin: 26px 0 10px; }
.sub { color: var(--muted); margin: 0 0 22px; }
.muted { color: var(--muted); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; margin-bottom: 18px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; }
.stat b { font-size: 28px; display: block; line-height: 1.1; }
.stat span { color: var(--muted); font-size: 13px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
.card h3 { margin: 0 0 12px; font-size: 15px; }
.center { text-align: center; }
.donut { width: 190px; height: 190px; display: block; margin: 0 auto; }
.dn1 { font-size: 26px; font-weight: 700; fill: var(--text); }
.dn2 { font-size: 11px; fill: var(--muted); }
.legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 14px; margin-top: 8px; font-size: 12.5px; color: var(--muted); }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 5px; }
.radar, .lineg { width: 100%; height: auto; display: block; }
.rl { font-size: 10.5px; fill: var(--muted); }
.bars { display: flex; flex-direction: column; gap: 8px; }
.brow { display: grid; grid-template-columns: 150px 1fr 44px; align-items: center; gap: 10px; font-size: 13px; }
.bl { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bt { height: 10px; background: var(--line); border-radius: 6px; overflow: hidden; }
.bf { display: block; height: 100%; border-radius: 6px; }
.bv { text-align: right; color: var(--muted); }
.btn { all: unset; box-sizing: border-box; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 9px 16px; border-radius: 8px; background: var(--accent); color: #fff; font-weight: 600; font-size: 14px; }
.btn:hover { filter: brightness(1.08); }
.btn.sec { background: #fff; color: var(--text); border: 1px solid var(--line); }
.btn.sec:hover { background: var(--na-soft); filter: none; }
.btn.danger { background: var(--ko); }
.btn.good { background: var(--ok); }
.btn.sm { padding: 6px 11px; font-size: 13px; }
.btn[disabled], .btn.off { opacity: .45; pointer-events: none; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.row.end { justify-content: flex-end; }
.pill { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; white-space: nowrap; }
.pill.acquis { background: var(--ok-soft); color: var(--ok); }
.pill.progres { background: var(--mid-soft); color: #b06a00; }
.pill.revoir { background: var(--ko-soft); color: var(--ko); }
.pill.none { background: var(--na-soft); color: var(--muted); }
.pill.lu { background: var(--ok-soft); color: var(--ok); }
.pill.nonlu { background: var(--ko-soft); color: var(--ko); }
.prog { height: 8px; background: var(--line); border-radius: 6px; overflow: hidden; min-width: 90px; }
.prog > span { display: block; height: 100%; background: var(--accent); }
details.topic { background: var(--card); border: 1px solid var(--line); border-radius: 12px; margin-bottom: 10px; }
details.topic > summary { list-style: none; cursor: pointer; padding: 14px 18px; display: grid; grid-template-columns: 1fr 140px 90px 110px; gap: 14px; align-items: center; }
details.topic > summary::-webkit-details-marker { display: none; }
details.topic[open] > summary { border-bottom: 1px solid var(--line); }
.skill { display: grid; grid-template-columns: 1fr 100px 60px 110px auto; gap: 12px; align-items: center; padding: 10px 18px; border-bottom: 1px solid var(--line); font-size: 14px; }
.skill:last-child { border-bottom: 0; }
.tw { overflow-x: auto; margin: 10px 0; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border: 1px solid var(--line); vertical-align: top; }
th { background: var(--na-soft); }
.form { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-bottom: 16px; }
.form label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
select, input[type=text], textarea { width: 100%; padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; background: #fff; color: var(--text); }
textarea { resize: vertical; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; display: flex; flex-direction: column; gap: 8px; }
.tile h3 { margin: 0; font-size: 16px; }
.tile p { margin: 0; color: var(--muted); font-size: 13.5px; flex: 1; }
.qhead { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 8px; flex-wrap: wrap; }
.qmeta { color: var(--muted); font-size: 13px; }
.qcard { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px 24px; }
.qtext { font-size: 18px; font-weight: 600; margin: 0 0 14px; }
.opts { display: flex; flex-direction: column; gap: 10px; margin: 16px 0; }
.opt { all: unset; box-sizing: border-box; cursor: pointer; display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 10px; background: #fff; }
.opt:hover { border-color: var(--accent); }
.opt .l { flex: none; width: 26px; height: 26px; border-radius: 50%; background: var(--na-soft); display: grid; place-items: center; font-size: 13px; font-weight: 700; }
.opt.sel { border-color: var(--accent); background: var(--accent-soft); }
.opt.ok { border-color: var(--ok); background: var(--ok-soft); }
.opt.ko { border-color: var(--ko); background: var(--ko-soft); }
.opt.lock { cursor: default; }
.expl { border-left: 4px solid var(--accent); background: var(--accent-soft); padding: 12px 14px; border-radius: 0 8px 8px 0; margin: 12px 0; }
.expl.ok { border-color: var(--ok); background: var(--ok-soft); }
.expl.ko { border-color: var(--ko); background: var(--ko-soft); }
.model { background: #f8fafc; border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin: 12px 0; }
.model ul { margin: 6px 0 0 18px; padding: 0; }
.timer { font-variant-numeric: tabular-nums; font-weight: 700; }
.timer.low { color: var(--ko); }
pre { background: #0f172a; color: #e6edf7; padding: 12px 14px; border-radius: 10px; overflow-x: auto; font-size: 13.5px; line-height: 1.45; margin: 10px 0; }
code { font-family: Consolas, "Cascadia Mono", monospace; }
p code, li code, td code, .tip code { background: var(--na-soft); padding: 1px 5px; border-radius: 5px; font-size: .92em; }
.course h3 { margin: 26px 0 8px; font-size: 19px; }
.course h4 { margin: 18px 0 6px; }
.course ul { margin: 6px 0 10px 20px; padding: 0; }
.course li { margin: 3px 0; }
.tip { background: var(--mid-soft); border-left: 4px solid var(--mid); padding: 10px 14px; border-radius: 0 8px 8px 0; margin: 12px 0; }
.overlay { position: fixed; inset: 0; background: rgba(15,23,42,.55); display: none; align-items: center; justify-content: center; padding: 20px; z-index: 50; }
.overlay.on { display: flex; }
.dlg { background: #fff; border-radius: 14px; padding: 22px 24px; width: 100%; max-width: 520px; max-height: 88vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,.35); }
.dlg.wide { max-width: 760px; }
.dlg h3 { margin: 0 0 10px; font-size: 19px; }
.score { font-size: 44px; font-weight: 800; text-align: center; margin: 6px 0; }
.editor { font-family: Consolas, "Cascadia Mono", monospace; font-size: 14px; min-height: 120px; }
.res { margin-top: 12px; }
.res table { font-size: 13px; }
.msg { padding: 10px 14px; border-radius: 8px; margin-top: 10px; }
.msg.ok { background: var(--ok-soft); color: #136b3a; }
.msg.ko { background: var(--ko-soft); color: #9b2a2a; }
.msg.info { background: var(--accent-soft); color: #1d3f94; }
.list { list-style: none; margin: 0; padding: 0; }
.list li { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.list li:last-child { border-bottom: 0; }
.check { display: flex; gap: 8px; align-items: flex-start; margin: 4px 0; }
@media (max-width: 860px) {
  .app { flex-direction: column; }
  .side { width: 100%; height: auto; position: static; flex-direction: column; }
  .nav { flex-direction: row; flex-wrap: wrap; }
  .nav button { width: auto; }
  .side .foot { display: none; }
  .grid2 { grid-template-columns: 1fr; }
  details.topic > summary { grid-template-columns: 1fr 90px; }
  details.topic > summary .hide-s { display: none; }
  .skill { grid-template-columns: 1fr auto; }
  .skill .hide-s { display: none; }
  .brow { grid-template-columns: 110px 1fr 40px; }
}