/* Memo des ouvertures — feuille de style unique, sans dependance externe. */

:root {
  --paper: #EFEDE6;
  --card: #FBFAF6;
  --ink: #1F1D1A;
  --muted: #6B675F;
  --line: #DCD8CE;
  --line-soft: #E9E5DC;
  --accent: #2C5F4F;
  --accent-ink: #1B4237;
  --accent-soft: #DEE9E3;
  --warn: #9A5B27;
  --warn-soft: #F4E5D4;
  --danger: #9E4436;
  --danger-soft: #F3DCD7;
  --ok: #2F7D52;
  --ok-soft: #DDEDE1;

  --sq-light: #F0D9B5;
  --sq-dark: #B58863;
  --sq-mark: rgba(255, 214, 84, .55);
  --sq-error: rgba(190, 60, 45, .55);

  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 30, 25, .05), 0 14px 30px -18px rgba(20, 40, 30, .35);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #16181A;
    --card: #1E2124;
    --ink: #E8E6E1;
    --muted: #9A968E;
    --line: #2E3236;
    --line-soft: #262A2D;
    --accent: #7FBFA6;
    --accent-ink: #A8D8C4;
    --accent-soft: #22332D;
    --warn: #D7A164;
    --warn-soft: #33291D;
    --danger: #E08472;
    --danger-soft: #34211D;
    --ok: #7FC79A;
    --ok-soft: #1F2E25;
    --line: #2E3236;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 14px 30px -18px rgba(0, 0, 0, .8);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }

body {
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

h1, h2, h3, h4 { line-height: 1.2; letter-spacing: -.01em; }
a { color: inherit; }

/* --- Barre du haut --------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1120px; margin: 0 auto; padding: 12px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark {
  font-size: 26px; line-height: 1; width: 40px; height: 40px; flex: 0 0 40px;
  display: grid; place-items: center; border-radius: 11px;
  background: var(--accent-soft); color: var(--accent-ink);
}
.brand-name { display: block; font-weight: 650; font-size: 17px; }
.brand-sub { display: block; font-size: 12.5px; color: var(--muted); }

.ghost-btn {
  font: inherit; font-size: 13px; color: var(--muted); cursor: pointer;
  background: transparent; border: 1px solid var(--line);
  padding: 7px 12px; border-radius: 999px;
}
.ghost-btn:hover { border-color: var(--accent); color: var(--accent-ink); }

main { max-width: 1120px; margin: 0 auto; padding: 26px 20px 60px; }

.lede { color: var(--muted); max-width: 68ch; margin: 10px 0 0; }

/* --- Accueil --------------------------------------------------------------- */
.home-head h2 { font-size: clamp(26px, 4.4vw, 36px); margin: 6px 0 0; }

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 18px; }
.filter {
  font: inherit; font-size: 13.5px; cursor: pointer; padding: 7px 14px;
  border-radius: 999px; border: 1px solid var(--line);
  background: var(--card); color: var(--muted);
}
.filter:hover { border-color: var(--accent); }
.filter.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .filter.is-active { color: #10201A; } }

.cards { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.card {
  display: flex; flex-direction: column; text-decoration: none;
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  transition: transform .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card-board { width: 100%; }
.card-body { padding: 14px 16px 16px; }
.card-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.card-top h3 { margin: 0; font-size: 17.5px; }
.eco {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px; color: var(--muted); white-space: nowrap;
}
.card-moves {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px; color: var(--accent-ink); margin: 8px 0 0;
}
@media (prefers-color-scheme: dark) { .card-moves { color: var(--accent); } }
.card-tagline { font-size: 14px; color: var(--muted); margin: 8px 0 0; }
.card-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.tag {
  font-size: 11.5px; padding: 3px 9px; border-radius: 999px;
  background: var(--line-soft); color: var(--muted); border: 1px solid var(--line);
}
.tag-white { background: #fff; color: #4a453c; }
.tag-black { background: #2A2724; color: #EDE9E1; border-color: #2A2724; }

/* --- Page d'une ouverture -------------------------------------------------- */
.crumbs { font-size: 13.5px; margin-bottom: 14px; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent-ink); }
.opening-head h2 { font-size: clamp(24px, 4vw, 32px); margin: 0; }
.opening-head .eco { font-size: 13px; margin-left: 8px; }

.tabs { display: flex; gap: 6px; margin: 22px 0 20px; border-bottom: 1px solid var(--line); }
.tab {
  text-decoration: none; padding: 10px 16px; font-size: 14.5px; color: var(--muted);
  border: 1px solid transparent; border-bottom: none; border-radius: 10px 10px 0 0;
  margin-bottom: -1px;
}
.tab:hover { color: var(--ink); }
.tab.is-active {
  background: var(--card); border-color: var(--line); color: var(--ink); font-weight: 600;
}

.layout { display: grid; gap: 22px; grid-template-columns: minmax(0, 1.05fr) minmax(280px, .95fr); }
@media (max-width: 880px) { .layout { grid-template-columns: 1fr; } }

.board-wrap { max-width: 540px; }

/* --- Echiquier ------------------------------------------------------------- */
.board {
  position: relative; width: 100%; aspect-ratio: 1;
  border-radius: 10px; overflow: hidden;
  box-shadow: var(--shadow);
  touch-action: none; user-select: none;
}
.board-squares {
  position: absolute; inset: 0;
  background-image: conic-gradient(
    var(--sq-dark) 90deg, var(--sq-light) 90deg 180deg,
    var(--sq-dark) 180deg 270deg, var(--sq-light) 270deg);
  background-size: 25% 25%;
}
.board-marks, .board-pieces, .board-arrows, .board-coords {
  position: absolute; inset: 0;
}
.board-marks, .board-arrows, .board-coords { pointer-events: none; }

.piece {
  position: absolute; top: 0; left: 0; width: 12.5%; height: 12.5%;
  display: grid; place-items: center; cursor: grab;
}
.piece-svg { width: 92%; height: 92%; display: block; }
.piece.moving { transition: transform .22s cubic-bezier(.25, .8, .35, 1); z-index: 3; }
.piece.dragging { z-index: 4; cursor: grabbing; filter: drop-shadow(0 6px 8px rgba(0, 0, 0, .35)); }
.piece.selected .piece-svg { filter: drop-shadow(0 0 6px rgba(44, 95, 79, .9)); }
.piece.captured { opacity: 0; transition: opacity .2s ease; }

.mark { position: absolute; top: 0; left: 0; width: 12.5%; height: 12.5%; }
.mark-last, .mark-from { background: var(--sq-mark); }
.mark-error { background: var(--sq-error); }
.mark-target::after {
  content: ''; position: absolute; inset: 38%; border-radius: 50%;
  background: rgba(30, 40, 30, .32);
}
.mark-capture::after {
  content: ''; position: absolute; inset: 4%; border-radius: 50%;
  border: 5px solid rgba(30, 40, 30, .3);
}

.arrow { stroke: rgba(44, 95, 79, .8); stroke-width: .13; stroke-linecap: round; }
.arrow-head { fill: rgba(44, 95, 79, .8); }

.coord {
  position: absolute; font-size: 9px; font-weight: 600;
  color: rgba(40, 35, 28, .55);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.coord.file { bottom: .5%; }
.coord.rank { left: .8%; }

/* --- Contrôles ------------------------------------------------------------- */
.controls { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.ctl {
  font: inherit; font-size: 14px; cursor: pointer;
  background: var(--card); color: var(--ink);
  border: 1px solid var(--line); border-radius: 10px; padding: 9px 13px;
  min-width: 44px;
}
.ctl:hover { border-color: var(--accent); }
.ctl-play { font-weight: 600; background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .ctl-play { color: #10201A; } }

/* --- Cartes de commentaire ------------------------------------------------- */
.note-card, .feedback {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px 16px; min-height: 96px;
}
.note-move, .feedback-title {
  margin: 0 0 6px; font-weight: 650; font-size: 15px; color: var(--accent-ink);
}
@media (prefers-color-scheme: dark) { .note-move, .feedback-title { color: var(--accent); } }
.note-text, .feedback p:last-child { margin: 0; color: var(--muted); font-size: 14.5px; }

.feedback-ok { background: var(--ok-soft); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
.feedback-ok .feedback-title { color: var(--ok); }
.feedback-error { background: var(--danger-soft); border-color: color-mix(in srgb, var(--danger) 40%, transparent); }
.feedback-error .feedback-title { color: var(--danger); }
.feedback-done { background: var(--accent-soft); border-color: var(--accent); }

/* --- Colonne latérale ------------------------------------------------------ */
.side { display: flex; flex-direction: column; gap: 16px; }
.side-block {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px 16px;
}
.side-block h3 {
  margin: 0 0 10px; font-size: 12px; text-transform: uppercase;
  letter-spacing: .12em; color: var(--muted); font-weight: 650;
}
.variant-text { margin: 0 0 10px; font-size: 13.5px; color: var(--muted); }

.variants { display: flex; flex-direction: column; gap: 6px; }
.variant {
  font: inherit; text-align: left; cursor: pointer; display: flex;
  align-items: center; gap: 8px; flex-wrap: wrap;
  background: transparent; border: 1px solid var(--line);
  border-radius: 10px; padding: 9px 11px; font-size: 14px; color: var(--ink);
}
.variant:hover { border-color: var(--accent); }
.variant.is-active { background: var(--accent-soft); border-color: var(--accent); font-weight: 600; }
.variant-name { flex: 1; min-width: 0; }
.badge {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: .08em;
  padding: 2px 7px; border-radius: 999px; background: var(--line-soft); color: var(--muted);
}
.badge-trap { background: var(--warn-soft); color: var(--warn); }

.movelist {
  list-style: none; margin: 0; padding: 0; max-height: 260px; overflow-y: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13.5px;
}
.movelist li { display: grid; grid-template-columns: 34px 1fr 1fr; gap: 4px; align-items: center; }
.movelist li:nth-child(odd) { background: var(--line-soft); border-radius: 6px; }
.movelist .num { color: var(--muted); font-size: 12px; padding-left: 4px; }
.movelist .mv {
  font: inherit; text-align: left; background: transparent; border: none;
  color: var(--ink); padding: 5px 6px; border-radius: 6px; cursor: pointer;
}
button.mv:hover { background: var(--accent-soft); }
.movelist .mv.is-current { background: var(--accent); color: #fff; font-weight: 700; }
@media (prefers-color-scheme: dark) { .movelist .mv.is-current { color: #10201A; } }
.movelist .empty { color: var(--muted); padding: 6px; display: block; }

.switch { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; }
.switch button {
  font: inherit; font-size: 13px; cursor: pointer; flex: 1; min-width: 120px;
  background: transparent; border: 1px solid var(--line);
  border-radius: 9px; padding: 8px 10px; color: var(--muted);
}
.switch button.is-active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
@media (prefers-color-scheme: dark) { .switch button.is-active { color: #10201A; } }

.score { display: flex; gap: 8px; margin-top: 10px; font-size: 12.5px; }
.score span { padding: 4px 10px; border-radius: 999px; }
.score-ok { background: var(--ok-soft); color: var(--ok); }
.score-ko { background: var(--warn-soft); color: var(--warn); }

.ideas-mini { margin: 0; padding-left: 18px; font-size: 13.5px; color: var(--muted); }
.ideas-mini li { margin-bottom: 8px; }
.ideas-mini strong { color: var(--ink); }

/* --- Explications ---------------------------------------------------------- */
.explain {
  display: grid; gap: 18px; margin-top: 26px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.explain-block {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px 18px;
}
.explain-block h3 {
  margin: 0 0 12px; font-size: 12px; text-transform: uppercase;
  letter-spacing: .12em; color: var(--muted); font-weight: 650;
}
.ideas { list-style: none; margin: 0; padding: 0; }
.ideas li { margin-bottom: 14px; }
.ideas strong { display: block; font-size: 14.5px; margin-bottom: 3px; }
.ideas span { font-size: 14px; color: var(--muted); }

.plans { display: flex; flex-direction: column; gap: 14px; }
.plan h4 { margin: 0 0 6px; font-size: 14px; display: flex; align-items: center; gap: 8px; }
.plan ul { margin: 0; padding-left: 18px; font-size: 14px; color: var(--muted); }
.plan li { margin-bottom: 5px; }
.dot { width: 12px; height: 12px; border-radius: 50%; border: 1px solid var(--ink); display: inline-block; }
.dot-white { background: #F6F3EC; }
.dot-black { background: #2A2724; }

.mistakes { margin: 0; padding-left: 18px; font-size: 14px; color: var(--muted); }
.mistakes li { margin-bottom: 7px; }

/* --- Pied de page ---------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--line); margin-top: 40px;
  padding: 20px; text-align: center;
}
.footer p { margin: 0; font-size: 12.5px; color: var(--muted); }