:root {
  --bg: #0f1115; --bg2: #161922; --card: #1b1f2a; --line: #2a3040; --txt: #e8eaf0; --mut: #8b93a7;
  --acc: #6c8cff; --ok: #2ecc71; --warn: #f5a623; --bad: #ff5d5d;
  --r: 14px; --safe-b: env(safe-area-inset-bottom, 0px); --safe-t: env(safe-area-inset-top, 0px);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--txt); -webkit-font-smoothing: antialiased; }
body { min-height: 100vh; }
a { color: var(--acc); text-decoration: none; }
h1, h2, h3 { margin: 0 0 .6rem; font-weight: 650; letter-spacing: -.01em; }
h2 { font-size: 1.05rem; }
h3 { font-size: .95rem; }
.hidden { display: none !important; }
.mut { color: var(--mut); }
.small { font-size: .82rem; }
.err { color: var(--bad); min-height: 1.2em; }

/* Layout */
#app { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.nav { position: sticky; top: 0; height: 100vh; padding: 18px 12px; background: var(--bg2); border-right: 1px solid var(--line); display: flex; flex-direction: column; gap: 4px; }
.brand { font-weight: 700; font-size: 1.15rem; padding: 6px 10px 18px; }
.nav a { display: flex; gap: 10px; align-items: center; padding: 10px 12px; border-radius: 10px; color: var(--mut); }
.nav a i { font-style: normal; width: 20px; text-align: center; }
.nav a.on, .nav a:hover { background: var(--card); color: var(--txt); }
.nav a.ext { margin-top: auto; color: var(--acc); }
main { padding: calc(22px + var(--safe-t)) 26px 40px; max-width: 1200px; width: 100%; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; align-items: start; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 16px; }
.card.span2 { grid-column: span 2; }
.head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.head h1 { font-size: 1.5rem; margin: 0; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 5px 11px; font-size: .82rem; color: var(--mut); }
.chip b { color: var(--txt); }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.spacer { flex: 1; }

/* Boutons / formulaires */
.btn { appearance: none; border: 1px solid var(--line); background: var(--bg2); color: var(--txt); border-radius: 10px; padding: 9px 14px; font: inherit; font-size: .9rem; cursor: pointer; }
.btn.primary { background: var(--acc); border-color: var(--acc); color: #fff; font-weight: 600; }
.btn.ghost { background: transparent; }
.btn.sm { padding: 5px 9px; font-size: .8rem; }
.btn:disabled { opacity: .5; }
input, textarea, select { width: 100%; background: var(--bg2); border: 1px solid var(--line); color: var(--txt); border-radius: 10px; padding: 10px 12px; font: inherit; font-size: 16px; }
textarea { resize: vertical; }
label { font-size: .8rem; color: var(--mut); display: block; margin: 8px 0 4px; }

/* Tuiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-bottom: 16px; }
.tile { display: flex; flex-direction: column; gap: 4px; padding: 14px; border-radius: var(--r); background: linear-gradient(135deg, #222842, #1b1f2a); border: 1px solid var(--line); color: var(--txt); }
.tile b { font-size: .95rem; }
.tile span { font-size: .78rem; color: var(--mut); }

/* Timeline */
.tl { display: flex; flex-direction: column; gap: 6px; }
.ev { display: grid; grid-template-columns: 54px 4px 1fr auto; gap: 10px; align-items: center; padding: 8px 10px; border-radius: 10px; background: var(--bg2); }
.ev .h { font-variant-numeric: tabular-nums; font-size: .8rem; color: var(--mut); line-height: 1.2; }
.ev .bar { align-self: stretch; border-radius: 4px; background: var(--c, var(--acc)); }
.ev .t { font-size: .9rem; line-height: 1.3; }
.ev .t small { display: block; color: var(--mut); font-size: .76rem; }
.ev.colle { background: #2a2338; }
.ev.ds, .ev.concours { background: #3a2226; }
.ev.revision { background: transparent; border: 1px dashed var(--line); }
.ev.revision.fait { opacity: .45; }
.ev.revision.fait .t { text-decoration: line-through; }
.ev.revision.saute { opacity: .45; }
.ev.passe .t, .ev.passe .h, .ev.passe .bar { opacity: .5; }
.ev .acts { display: flex; gap: 4px; }
.ev .acts button { border: 1px solid var(--line); background: var(--card); color: var(--mut); border-radius: 8px; width: 30px; height: 30px; cursor: pointer; }
.ev .acts button.on { background: var(--ok); color: #fff; border-color: var(--ok); }
.tag { display: inline-block; font-size: .7rem; padding: 1px 7px; border-radius: 999px; background: var(--line); color: var(--txt); margin-left: 4px; vertical-align: middle; }
.tag.warn { background: #4a3a14; color: #ffd27a; }
.tag.ok { background: #173d27; color: #7ff0ac; }
.tag.bad { background: #4a1d1d; color: #ff9b9b; }

.list { display: flex; flex-direction: column; }
.li { display: flex; gap: 10px; align-items: center; padding: 9px 0; border-bottom: 1px solid var(--line); }
.li:last-child { border-bottom: 0; }
.li .grow { flex: 1; min-width: 0; }
.li .grow small { display: block; color: var(--mut); font-size: .76rem; }
.big { font-size: 1.6rem; font-weight: 700; }
.count { font-variant-numeric: tabular-nums; font-weight: 700; min-width: 44px; text-align: center; padding: 6px 4px; border-radius: 10px; background: var(--bg2); font-size: .85rem; }
.count.urg { background: #4a1d1d; color: #ffb3b3; }

/* Semaine */
.week { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 8px; }
.day { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 10px; min-height: 120px; }
.day.today { border-color: var(--acc); }
.day h3 { font-size: .85rem; display: flex; justify-content: space-between; }
.day .ev { grid-template-columns: 1fr; gap: 2px; padding: 6px 8px; border-left: 3px solid var(--c, var(--acc)); }
.day .ev .h { font-size: .72rem; }
.day .ev .t { font-size: .78rem; }
.day .ev .bar, .day .ev .acts { display: none; }
.daypick { display: none; gap: 6px; overflow-x: auto; margin-bottom: 12px; }
.daypick button { flex: 1; min-width: 44px; padding: 8px 4px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--mut); font: inherit; font-size: .78rem; }
.daypick button.on { background: var(--acc); color: #fff; border-color: var(--acc); }

/* Fiches */
.fiche { line-height: 1.6; }
.fiche h1 { font-size: 1.3rem; } .fiche h2 { font-size: 1.1rem; margin-top: 1.4rem; } .fiche h3 { margin-top: 1rem; }
.fiche code { background: var(--bg2); padding: 1px 5px; border-radius: 5px; }
.fiche blockquote { margin: .8rem 0; padding: .4rem .9rem; border-left: 3px solid var(--acc); background: var(--bg2); border-radius: 0 8px 8px 0; }
.fiche details { background: var(--bg2); border-radius: 10px; padding: 8px 12px; margin: 8px 0; }
.fiche summary { cursor: pointer; color: var(--acc); }
.fiche table { border-collapse: collapse; } .fiche td, .fiche th { border: 1px solid var(--line); padding: 4px 8px; }
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 4px 0; }

/* Poids */
.chart svg { width: 100%; height: 160px; }

/* Login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { width: 100%; max-width: 340px; display: flex; flex-direction: column; gap: 12px; text-align: center; }
.logo { font-size: 3rem; color: var(--acc); }

/* Dialog, toast, FAB */
.dlg { border: 1px solid var(--line); background: var(--card); color: var(--txt); border-radius: var(--r); width: min(480px, 92vw); padding: 18px; }
.dlg::backdrop { background: rgba(0,0,0,.55); }
.dlg .row { justify-content: flex-end; margin-top: 12px; }
.toast { position: fixed; left: 50%; bottom: calc(90px + var(--safe-b)); transform: translateX(-50%) translateY(20px); background: #2b3245; color: var(--txt); padding: 10px 16px; border-radius: 12px; opacity: 0; transition: .25s; pointer-events: none; z-index: 50; }
.toast.on { opacity: 1; transform: translateX(-50%); }
.fab { display: none; }

/* Mobile */
@media (max-width: 760px) {
  #app { grid-template-columns: 1fr; }
  .nav { position: fixed; bottom: 0; top: auto; left: 0; right: 0; height: auto; flex-direction: row; justify-content: space-around; padding: 6px 4px calc(6px + var(--safe-b)); border-right: 0; border-top: 1px solid var(--line); z-index: 20; background: rgba(22,25,34,.96); backdrop-filter: blur(10px); }
  .nav .brand, .nav .desk-only { display: none; }
  .nav a { flex-direction: column; gap: 2px; padding: 6px 8px; font-size: .68rem; }
  .nav a i { font-size: 1.15rem; }
  main { padding: calc(14px + var(--safe-t)) 14px calc(96px + var(--safe-b)); }
  .grid { grid-template-columns: 1fr; }
  .card.span2 { grid-column: auto; }
  .week { grid-template-columns: 1fr; }
  .week .day { display: none; }
  .week .day.sel { display: block; }
  .day .ev { grid-template-columns: 54px 4px 1fr auto; border-left: 0; }
  .day .ev .bar, .day .ev .acts { display: flex; }
  .day .ev .bar { display: block; }
  .daypick { display: flex; }
  .fab { display: grid; place-items: center; position: fixed; right: 16px; bottom: calc(76px + var(--safe-b)); width: 52px; height: 52px; border-radius: 50%; border: 0; background: var(--acc); color: #fff; font-size: 1.4rem; box-shadow: 0 8px 24px rgba(0,0,0,.4); z-index: 25; }
  .head h1 { font-size: 1.3rem; }
}