:root {
  --bg: #faf7f2;
  --surface: #fff;
  --surface-2: #f3eee6;
  --fg: #222;
  --muted: #6f6a63;
  --accent: #c0392b;
  --accent-hover: #a93226;
  --border: #e3ddd3;
  --again: #c0392b;
  --hard: #c27c0e;
  --good: #23944f;
  --easy: #2e86c1;
  --radius: 8px;
  --shadow: 0 1px 2px rgb(0 0 0 / .06), 0 4px 12px rgb(0 0 0 / .05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1a18; --surface: #252421; --surface-2: #2e2c29; --fg: #eee; --muted: #a39e97;
    --border: #3a3733; --accent: #e0584a; --accent-hover: #ea6b5e;
    --shadow: 0 1px 2px rgb(0 0 0 / .3);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.45;
}

a { color: var(--accent); }
:focus-visible { outline: 2px solid var(--easy); outline-offset: 2px; }

/* En-tête */
header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 1.5rem;
  padding: .6rem 1.5rem;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}
header h1 { margin: 0; font-size: 1.6rem; }
header h1 a { text-decoration: none; }
header nav { display: flex; gap: .25rem; flex: 1; }
header nav a {
  color: var(--muted); text-decoration: none; padding: .35rem .75rem; border-radius: 999px;
  transition: background .15s, color .15s;
}
header nav a:hover { background: var(--surface-2); color: var(--fg); }
header nav a.active { color: var(--fg); background: var(--surface-2); font-weight: 600; }

main { max-width: 900px; margin: 0 auto; padding: 1rem 1rem 3rem; }

h2 { margin: .5rem 0 1rem; }
h3 { margin: .25rem 0; }
h4 { margin: 1rem 0 .5rem; }
section { margin-bottom: 2rem; }

/* Formulaires */
.row { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: .5rem; }
.row > * { flex: 1 1 140px; }
.row > button { flex: 0 0 auto; }
.stack { display: flex; flex-direction: column; gap: .9rem; }
label { display: flex; flex-direction: column; gap: .25rem; font-size: .9rem; }
label.check { flex-direction: row; align-items: center; gap: .5rem; font-size: 1rem; cursor: pointer; }
input, select {
  padding: .5rem .6rem; border: 1px solid var(--border); border-radius: 6px;
  background: var(--surface); color: inherit; font: inherit; font-size: 1rem;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus { outline: none; border-color: var(--easy); box-shadow: 0 0 0 3px rgb(46 134 193 / .2); }
input[type=checkbox] { width: 1.1rem; height: 1.1rem; accent-color: var(--accent); }
fieldset { border: 1px solid var(--border); border-radius: var(--radius); padding: .5rem 1rem 1rem; }
legend { padding: 0 .35rem; font-weight: 600; }
.hanzi-sm { font-size: 1.25rem; white-space: nowrap; }

button, .button {
  display: inline-flex; align-items: center; justify-content: center; gap: .35rem;
  padding: .5rem 1rem; border: 1px solid transparent; border-radius: 6px;
  background: var(--accent); color: #fff; cursor: pointer; font: inherit; font-size: 1rem;
  text-decoration: none; transition: background .15s, transform .05s;
}
button:hover, .button:hover { background: var(--accent-hover); }
button:active { transform: translateY(1px); }
button.secondary, .button.secondary { background: transparent; color: var(--fg); border-color: var(--border); }
button.secondary:hover, .button.secondary:hover { background: var(--surface-2); }
button.danger { background: transparent; color: var(--accent); border-color: var(--accent); }
button.danger:hover { background: var(--accent); color: #fff; }
button.link { background: none; color: var(--muted); padding: .25rem; border: 0; }
button.link:hover { color: var(--accent); background: none; }
button:disabled { opacity: .5; cursor: default; transform: none; }
.icon-button {
  background: none; color: var(--muted); border: 0; padding: .15rem .3rem; font-size: 1rem;
  border-radius: 6px; vertical-align: middle;
}
.icon-button:hover { background: var(--surface-2); color: var(--fg); }

/* Panneaux repliables */
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  margin-bottom: 1rem; padding: 0 1rem;
}
.panel > summary { cursor: pointer; padding: .75rem 0; font-weight: 600; }
.panel[open] { padding-bottom: 1rem; }

/* Tableaux */
.table-wrap {
  overflow-x: auto; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .5rem .75rem; border-bottom: 1px solid var(--border); }
tbody tr:last-child td { border-bottom: 0; }
thead th { background: var(--surface-2); font-size: .85rem; color: var(--muted); font-weight: 600; }
table.data tbody tr:hover { background: var(--surface-2); }
table.compact td { padding: .3rem .6rem; }
tr.clickable { cursor: pointer; }
td.hanzi { font-size: 1.5rem; white-space: nowrap; }
.check-col { width: 2.5rem; }
.actions-col { width: 3rem; text-align: right; }
.sort {
  background: none; border: 0; padding: 0; color: inherit; font: inherit; font-weight: 600;
}
.sort:hover { background: none; color: var(--fg); }
.sort.active { color: var(--fg); }
.sort[data-dir="asc"]::after { content: " ▲"; font-size: .7em; }
.sort[data-dir="desc"]::after { content: " ▼"; font-size: .7em; }
.filters { margin-top: .5rem; }

/* Pagination */
.pager {
  display: flex; align-items: center; justify-content: space-between; gap: .75rem; flex-wrap: wrap;
  margin: .75rem 0; font-size: .9rem;
}
.pager-buttons { display: flex; align-items: center; gap: .25rem; }
.pager-buttons button { padding: .3rem .65rem; }
.pager-info { padding: 0 .5rem; white-space: nowrap; }
.pager-size { flex-direction: row; align-items: center; gap: .4rem; font-size: .9rem; }
.pager-size select { padding: .25rem .4rem; }

/* Liste d'exercices */
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: .5rem; }
.toolbar h2 { margin-bottom: .25rem; }
.toolbar p { margin: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 1rem; }
.exercise {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 1rem; display: flex; flex-direction: column; gap: .5rem; box-shadow: var(--shadow);
  transition: transform .15s, box-shadow .15s;
}
.exercise:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgb(0 0 0 / .08); }
.exercise p { margin: 0; }
.actions { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; margin-top: auto; }
.small-actions { margin: .25rem 0 .75rem; }
.small-actions button { padding: .3rem .7rem; font-size: .9rem; }
.tags { display: flex; flex-wrap: wrap; gap: .25rem; }
.tag { font-size: .75rem; padding: .1rem .5rem; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); white-space: nowrap; }
.tag.new { color: var(--easy); border-color: var(--easy); }
.counts { display: flex; gap: 1rem; margin: 0; font-weight: 600; flex-wrap: wrap; }
.counts .due, .counts .good { color: var(--good); }
.counts .new, .counts .easy { color: var(--easy); }
.counts .again { color: var(--again); }
.counts .hard { color: var(--hard); }
.progress { height: 6px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.progress-bar { height: 100%; background: var(--good); border-radius: 999px; transition: width .3s; }
.empty {
  grid-column: 1 / -1; text-align: center; padding: 2rem; color: var(--muted);
  border: 2px dashed var(--border); border-radius: 12px;
}

/* Éditeur d'exercice */
.mode-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: .5rem; }
.mode-option {
  display: grid; grid-template-columns: auto 1fr; column-gap: .5rem; align-items: center;
  padding: .5rem .75rem; border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer;
  font-size: .95rem;
}
.mode-option small { grid-column: 2; }
.mode-option:has(input:checked) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
  flex-direction: row; align-items: center; gap: .4rem; padding: .3rem .75rem;
  border: 1px solid var(--border); border-radius: 999px; cursor: pointer; font-size: .95rem;
}
.chip:has(input:checked) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.sticky-footer {
  position: sticky; bottom: 0; display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; flex-wrap: wrap; padding: .75rem 0; background: var(--bg); border-top: 1px solid var(--border);
}
.sticky-footer p { margin: 0; }

/* Révision */
.flashcard {
  position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 2rem 1rem; text-align: center; min-height: 260px; box-shadow: var(--shadow); margin-top: .75rem;
}
.flashcard .tag { position: absolute; top: 1rem; right: 1rem; }
.flashcard hr { border: 0; border-top: 1px solid var(--border); margin: 1.5rem 0; }
.big-hanzi { font-size: 4rem; line-height: 1.2; }
.big-meaning { font-size: 2rem; }
.pinyin { font-size: 1.5rem; color: var(--accent); }
.big-pinyin { font-size: 2.5rem; color: var(--accent); }
.big-audio {
  font-size: 3rem; width: 6rem; height: 6rem; border-radius: 50%; margin: .5rem auto;
  background: var(--surface-2); color: var(--fg); border: 1px solid var(--border);
}
.big-audio:hover { background: var(--border); }
.flashcard .big-audio + small { display: block; }
.answer-word { display: flex; align-items: center; justify-content: center; gap: .5rem; }
.answer-word .icon-button { font-size: 1.4rem; }
.typed { display: flex; flex-direction: column; align-items: center; gap: .35rem; margin-top: 1.25rem; }
.typed input { width: min(100%, 320px); text-align: center; font-size: 1.4rem; }
.typed-preview { min-height: 1.6rem; font-size: 1.3rem; color: var(--accent); }
.verdict { font-weight: 600; margin: 1rem 0 0; }
.verdict.ok { color: var(--good); }
.verdict.partial { color: var(--hard); }
.verdict.ko { color: var(--again); }
.grade.suggested { outline: 3px solid var(--fg); outline-offset: 2px; }
.meaning { font-size: 1.3rem; margin-top: .25rem; }
.example {
  margin: 1.25rem auto 0; padding: .75rem 1rem; max-width: 520px; text-align: left;
  background: var(--surface-2); border-radius: var(--radius); font-size: 1.05rem;
}
.controls { display: flex; gap: .5rem; justify-content: center; margin: 1rem 0; flex-wrap: wrap; }
.controls > button { flex: 1 1 120px; max-width: 200px; }
#reveal { max-width: 320px; }
.grade { display: flex; flex-direction: column; align-items: center; gap: .15rem; }
.grade small { opacity: .85; font-size: .75rem; }
.grade.again { background: var(--again); }
.grade.hard { background: var(--hard); }
.grade.good { background: var(--good); }
.grade.easy { background: var(--easy); }
.grade:hover { filter: brightness(1.1); }
kbd { font-family: inherit; font-size: .75em; opacity: .8; border: 1px solid currentColor; border-radius: 3px; padding: 0 .25em; }

/* Ordre des traits */
.strokes { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; margin: .5rem 0; }
.stroke-box {
  background: var(--surface); border: 1px solid var(--border); border-radius: 6px;
  background-image:
    linear-gradient(to right, transparent calc(50% - .5px), var(--border) 50%, transparent calc(50% + .5px)),
    linear-gradient(to bottom, transparent calc(50% - .5px), var(--border) 50%, transparent calc(50% + .5px));
}
.center-actions { justify-content: center; }

/* Fiche d'un mot */
.word-dialog {
  width: min(640px, calc(100vw - 2rem)); max-height: calc(100vh - 2rem);
  border: 1px solid var(--border); border-radius: 14px; padding: 1.5rem;
  background: var(--bg); color: var(--fg); box-shadow: 0 20px 60px rgb(0 0 0 / .3);
}
.word-dialog::backdrop { background: rgb(0 0 0 / .45); }
.word-dialog h3 { margin-top: 1.25rem; border-bottom: 1px solid var(--border); padding-bottom: .25rem; }
.dialog-close { position: absolute; top: .75rem; right: .75rem; }
.examples { list-style: none; padding: 0; margin: .5rem 0 1rem; display: flex; flex-direction: column; gap: .5rem; }
.examples li {
  position: relative; padding: .6rem 2.5rem .6rem .9rem; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
}
.examples li button.link { position: absolute; top: .5rem; right: .5rem; }

/* Notifications */
.toasts {
  position: fixed; bottom: 1rem; left: 50%; transform: translateX(-50%); z-index: 100;
  display: flex; flex-direction: column; gap: .5rem; align-items: center; pointer-events: none;
  width: min(480px, calc(100vw - 2rem));
}
.toast {
  padding: .6rem 1rem; border-radius: var(--radius); background: var(--fg); color: var(--bg);
  box-shadow: 0 6px 20px rgb(0 0 0 / .2); animation: toast-in .2s ease-out; transition: opacity .4s;
  max-width: 100%;
}
.toast.success { background: var(--good); color: #fff; }
.toast.error { background: var(--again); color: #fff; }
.toast.leaving { opacity: 0; }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } }

.center { text-align: center; }
.tags.center { justify-content: center; }
.muted { color: var(--muted); }
.small { font-size: .85rem; font-weight: normal; }
label.small { font-size: .9rem; }
.status { font-size: .85rem; color: var(--muted); white-space: nowrap; }
.status.ok { color: var(--good); }
.status.ko { color: var(--accent); }
.error { color: var(--accent); min-height: 1em; }
[hidden] { display: none !important; }

/* Listes prêtes à importer */
.packs { display: flex; flex-direction: column; gap: .5rem; }
.pack {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: .5rem 1rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg);
}
.pack .muted { flex: 1; }
.pack .done { color: var(--good); font-weight: 600; }

/* Petits écrans */
@media (max-width: 600px) {
  header { padding: .5rem 1rem; gap: .75rem; flex-wrap: wrap; }
  header .status { display: none; }
  header .account { margin-left: auto; }
  header nav { order: 3; flex-basis: 100%; overflow-x: auto; }
  .hide-narrow { display: none; }
  .big-hanzi { font-size: 3rem; }
  .pager { justify-content: center; }
  .controls > button { flex-basis: 40%; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* Claviers à l'écran (keyboard.js) */
.kb-field { display: flex; gap: .25rem; align-items: stretch; min-width: 0; }
.kb-field > input { flex: 1; min-width: 0; }
.typed .kb-field { width: min(100%, 360px); }
.typed .kb-field > input { width: auto; }
.kb-toggle {
  flex: 0 0 auto; padding: 0 .55rem; background: var(--surface-2); color: var(--muted);
  border: 1px solid var(--border); font-size: 1rem; min-width: 2.3rem;
}
.kb-toggle:hover { background: var(--border); color: var(--fg); }
.kb-toggle.active { background: var(--accent); border-color: var(--accent); color: #fff; }
body.kb-open { padding-bottom: var(--kb-height, 240px); }
.kb-open .word-dialog { max-height: calc(100vh - var(--kb-height, 240px) - 1rem); margin-top: .5rem; }
.keyboard {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%); z-index: 90;
  width: min(760px, 100%); max-height: 60vh; overflow: auto;
  display: flex; flex-direction: column; gap: .5rem; padding: .6rem .75rem .75rem;
  background: var(--surface); border: 1px solid var(--border); border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0; box-shadow: 0 -4px 18px rgb(0 0 0 / .12);
  color: var(--fg); text-align: left;
}
.keyboard[hidden] { display: none; }
.kb-head { display: flex; align-items: center; gap: .6rem; }
.kb-head > :last-child { margin-left: auto; }
.kb-buffer { flex: 1; min-width: 0; font-size: 1.1rem; }
.kb-tones, .kb-vowels { display: flex; flex-wrap: wrap; gap: .35rem; }
.kb-tones button { font-size: 1.3rem; min-width: 3.4rem; gap: .3rem; }
.kb-tones kbd { font-size: .65rem; }
.kb-vowels button { font-size: 1.15rem; min-width: 2.4rem; padding: .35rem .5rem; }
.kb-candidates { display: flex; flex-wrap: wrap; gap: .35rem; min-height: 3.4rem; align-items: center; }
.kb-candidate {
  flex-direction: column; gap: 0; padding: .25rem .55rem; position: relative; min-width: 3.2rem;
  background: var(--surface-2); color: var(--fg); border: 1px solid var(--border);
}
.kb-candidate:hover { background: var(--border); }
.kb-candidate:first-child { border-color: var(--easy); }
.kb-candidate kbd { position: absolute; top: 2px; left: 4px; font-size: .6rem; opacity: .6; border: 0; padding: 0; }
.kb-hanzi { font-size: 1.45rem; line-height: 1.2; }
.kb-candidate small { font-size: .7rem; color: var(--muted); }
.kb-nav { display: flex; align-items: center; gap: .35rem; flex-wrap: wrap; }
.kb-nav button { padding: .2rem .7rem; }

/* Classificateurs */
.measure { display: flex; align-items: center; justify-content: center; gap: .4rem; flex-wrap: wrap; margin-top: .5rem; }
.word-dialog .measure { justify-content: flex-start; margin-bottom: .5rem; }
.blank { color: var(--accent); padding: 0 .1em; }
.choices { display: flex; justify-content: center; gap: .6rem; flex-wrap: wrap; margin-top: 1.25rem; }
.choice { flex-direction: column; gap: .1rem; min-width: 4.5rem; padding: .5rem .9rem; }
.choice .hanzi-sm { font-size: 1.8rem; }
.choice small { color: var(--muted); }
.choice.ok, .choice.ok:disabled { opacity: 1; background: var(--good); border-color: var(--good); color: #fff; }
.choice.ok small, .choice.ko small { color: inherit; }
.choice.ko, .choice.ko:disabled { opacity: 1; background: var(--again); border-color: var(--again); color: #fff; }

/* Comptes */
.account { display: flex; align-items: center; gap: .5rem; }
.account-link {
  display: inline-flex; align-items: center; gap: .4rem; color: var(--fg); text-decoration: none;
  padding: .2rem .6rem .2rem .2rem; border-radius: 999px;
}
.account-link:hover, .account-link.active { background: var(--surface-2); }
.avatar {
  display: inline-grid; place-items: center; width: 1.8rem; height: 1.8rem; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 600; font-size: .9rem;
}
.small-button { padding: .3rem .8rem; font-size: .9rem; }
.auth-card {
  max-width: 380px; margin: 2rem auto; padding: 1.5rem; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.auth-card h2 { margin-top: 0; }
.account-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }
.card-box {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem 1.25rem; margin: 0;
}
.card-box h3 { margin: .25rem 0 .75rem; }
.card-box h3:not(:first-child) { margin-top: 1.25rem; }
.tabs { display: inline-flex; border: 1px solid var(--border); border-radius: 999px; padding: 2px; }
.tabs button { background: transparent; color: var(--muted); border-radius: 999px; padding: .35rem 1rem; }
.tabs button:hover { background: var(--surface-2); color: var(--fg); }
.tabs button.active { background: var(--surface-2); color: var(--fg); font-weight: 600; }
.tag.role { color: var(--easy); border-color: color-mix(in srgb, var(--easy) 50%, transparent); }
tr.inactive td { opacity: .55; }
.nowrap { white-space: nowrap; }
.section-title { margin: 2rem 0 .75rem; }
.form-dialog { width: min(560px, calc(100vw - 2rem)); }
.form-dialog fieldset .check { margin: .25rem 0; }
.member-list { max-height: 14rem; overflow-y: auto; margin-top: .5rem; display: grid; gap: .1rem; }
.password-box {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin: 1rem 0;
  padding: .75rem 1rem; background: var(--surface-2); border-radius: var(--radius);
}
.password-box code { font-size: 1.2rem; user-select: all; word-break: break-all; }
@media (max-width: 640px) {
  .account-name { display: none; }
  .account-link { padding: .2rem; }
}
td.due { color: var(--hard); font-weight: 600; }