/* Coloriage Mystère — UI */
:root {
  --bg: #f4f2ec;
  --card: #ffffff;
  --ink: #23252b;
  --muted: #7a7d87;
  --accent: #6a5acd;
  --accent-ink: #ffffff;
  --line: #e4e1d8;
  --radius: 14px;
  color-scheme: light;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.45;
}

.topbar {
  display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
  padding: 18px 22px 6px;
  max-width: 1060px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand h1 { font-size: 1.35rem; margin: 0; letter-spacing: -0.01em; }
.tagline { color: var(--muted); font-size: 0.9rem; }

main {
  max-width: 1060px; margin: 0 auto; padding: 10px 18px 40px;
  display: grid; gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px 20px;
  box-shadow: 0 1px 3px rgb(35 37 43 / 4%);
}
.card h2 { font-size: 1.02rem; margin: 0 0 14px; display: flex; align-items: center; gap: 9px; }
.step-num {
  display: inline-grid; place-items: center;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink);
  font-size: 0.85rem;
}

/* ---- dropzone ---- */
#dropzone {
  border: 2px dashed #cdc9bd; border-radius: var(--radius);
  min-height: 160px; display: grid; place-items: center;
  cursor: pointer; text-align: center; padding: 14px;
  transition: border-color 0.15s, background 0.15s;
}
#dropzone:hover, #dropzone.dragover { border-color: var(--accent); background: #f6f4ff; }
#drop-hint { color: var(--muted); }
#drop-hint p { margin: 8px 0 0; }
#drop-hint strong { color: var(--ink); }
#input-preview { max-width: 100%; max-height: 380px; border-radius: 8px; }

/* ---- paramètres ---- */
.params-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px 22px; margin-bottom: 18px;
}
.param { display: flex; flex-direction: column; gap: 5px; font-size: 0.92rem; }
.param-name { font-weight: 600; display: flex; align-items: center; gap: 7px; }
.param-name output { color: var(--accent); font-variant-numeric: tabular-nums; margin-left: auto; }
.param-name output + .info-btn { margin-left: 0; }
.info-btn {
  margin-left: auto; flex: none;
  width: 19px; height: 19px; border-radius: 50%;
  border: 1.5px solid #c9c4b8; background: #fff; color: var(--muted);
  font: italic 700 0.72rem/1 Georgia, serif;
  cursor: pointer; display: inline-grid; place-items: center;
  transition: border-color 0.15s, color 0.15s;
}
.info-btn:hover, .info-btn:focus-visible { border-color: var(--accent); color: var(--accent); }
.param-help { color: var(--muted); font-size: 0.8rem; }
.param input[type="range"] { accent-color: var(--accent); width: 100%; }
.param select, .param input[type="number"] {
  padding: 7px 9px; border: 1px solid var(--line); border-radius: 8px;
  font: inherit; background: #fff; color: inherit; width: 100%;
}
.param-check { flex-direction: row; flex-wrap: wrap; align-items: center; gap: 8px; }
.param-check input { width: 17px; height: 17px; accent-color: var(--accent); }
.param-check .param-name { flex: 1; }
.param-check .param-help { flex-basis: 100%; margin-left: 25px; }
.seed-row { display: flex; gap: 8px; }
.seed-row input { flex: 1; }
.seed-row button {
  border: 1px solid var(--line); background: #fff; border-radius: 8px;
  font-size: 1.05rem; padding: 4px 11px; cursor: pointer;
}
.seed-row button:hover { border-color: var(--accent); }

/* ---- réglages avancés ---- */
.advanced { margin: 4px 0 18px; border: 1px dashed var(--line); border-radius: 10px; }
.advanced summary {
  cursor: pointer; padding: 11px 14px; font-weight: 600; font-size: 0.92rem;
  color: var(--muted); list-style-position: inside;
}
.advanced summary:hover { color: var(--accent); }
.advanced[open] summary { border-bottom: 1px dashed var(--line); color: var(--ink); }
.advanced .params-grid { padding: 14px; margin-bottom: 0; }

/* ---- dialog d'aide ---- */
#info-dialog {
  border: none; border-radius: 14px; padding: 22px;
  max-width: min(440px, calc(100vw - 40px));
  box-shadow: 0 12px 40px rgb(35 37 43 / 25%);
  color: var(--ink);
}
#info-dialog::backdrop { background: rgb(35 37 43 / 45%); }
#info-dialog h3 { margin: 0 0 10px; font-size: 1.05rem; }
#info-dialog p { margin: 0 0 12px; font-size: 0.92rem; line-height: 1.55; }
.info-tip {
  background: #f6f4ff; border-left: 3px solid var(--accent);
  padding: 9px 12px; border-radius: 0 8px 8px 0; color: #4b3fae;
}
.info-tip:empty { display: none; }
#info-close { width: 100%; }

button.primary {
  background: var(--accent); color: var(--accent-ink);
  border: none; border-radius: 10px;
  font: inherit; font-weight: 600; font-size: 1rem;
  padding: 12px 22px; cursor: pointer;
  transition: filter 0.15s, transform 0.05s;
}
button.primary:hover:not(:disabled) { filter: brightness(1.08); }
button.primary:active:not(:disabled) { transform: scale(0.99); }
button.primary:disabled { opacity: 0.45; cursor: not-allowed; }

/* ---- progression ---- */
.progress-track {
  height: 9px; border-radius: 5px; background: #ece9e0; overflow: hidden;
}
#progress-bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), #9b8cf0);
  border-radius: 5px; transition: width 0.25s ease;
}
#progress-note { margin: 8px 2px 14px; font-size: 0.88rem; }
.muted { color: var(--muted); }

.stages {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 14px;
}
.stage { margin: 0; }
.stage canvas {
  width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--line);
  display: block; background: #fafafa;
}
.stage figcaption { font-size: 0.8rem; color: var(--muted); margin-top: 5px; text-align: center; }

/* ---- résultat ---- */
.stats { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 12px; }
.stat {
  background: #f6f4ff; border: 1px solid #e6e1fb; color: #4b3fae;
  border-radius: 9px; padding: 7px 13px; font-size: 0.88rem; font-weight: 600;
}
.palette { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.chip {
  display: inline-grid; place-items: center;
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid rgb(0 0 0 / 14%);
  font-size: 0.8rem; font-weight: 700;
}
/* ---- comparateur avant/après ---- */
.compare-wrap { display: grid; gap: 10px; justify-items: center; }
.compare-frame {
  position: relative; overflow: hidden;
  border: 1px solid var(--line); border-radius: 10px;
  background: #eceae3;
  width: 100%;
  box-shadow: 0 3px 18px rgb(35 37 43 / 14%);
  touch-action: none;           /* le glissement ne doit pas scroller la page */
  cursor: ew-resize;
  user-select: none; -webkit-user-select: none;
}
.compare-layer { position: absolute; inset: 0; pointer-events: none; }
.compare-layer svg { display: block; width: 100%; height: 100%; }
.compare-top {
  clip-path: inset(0 45% 0 0);  /* révélé à gauche du curseur */
}
.compare-frame.animate .compare-top { transition: clip-path 0.55s cubic-bezier(0.3, 0, 0.2, 1); }
.compare-frame.animate .compare-handle { transition: left 0.55s cubic-bezier(0.3, 0, 0.2, 1); }
.compare-handle {
  position: absolute; top: 0; bottom: 0; left: 55%;
  width: 0; pointer-events: none;
}
.compare-handle::before {
  content: ''; position: absolute; top: 0; bottom: 0; left: -1.5px;
  width: 3px; background: var(--accent);
  box-shadow: 0 0 0 1px rgb(255 255 255 / 65%);
}
.compare-grip {
  position: absolute; top: 50%; left: 0; transform: translate(-50%, -50%);
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--accent); color: #fff;
  display: grid; place-items: center;
  font-size: 0.85rem; letter-spacing: -1px;
  box-shadow: 0 2px 10px rgb(35 37 43 / 35%), 0 0 0 2px rgb(255 255 255 / 65%);
}
.compare-handle:focus-visible .compare-grip { outline: 3px solid #b9aef5; }
.compare-controls {
  display: flex; align-items: center; gap: 12px; width: 100%;
  max-width: 560px;
}
.compare-controls input[type="range"] { flex: 1; accent-color: var(--accent); }
.compare-controls button {
  border: 1px solid var(--line); background: #fff; color: inherit;
  border-radius: 9px; font: inherit; font-size: 0.88rem; font-weight: 600;
  padding: 8px 12px; cursor: pointer; white-space: nowrap;
}
.compare-controls button:hover { border-color: var(--accent); color: var(--accent); }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.actions button {
  border: 1px solid var(--line); background: #fff; color: inherit;
  border-radius: 10px; font: inherit; font-weight: 600;
  padding: 11px 16px; cursor: pointer;
}
.actions button:hover { border-color: var(--accent); color: var(--accent); }
.actions button.primary { border: none; color: var(--accent-ink); }
.actions button.primary:hover { color: var(--accent-ink); }
#perf-note { font-size: 0.78rem; margin-top: 12px; }

footer {
  max-width: 1060px; margin: 0 auto; padding: 0 22px 30px;
  color: var(--muted); font-size: 0.82rem;
}

@media (max-width: 560px) {
  main { padding: 8px 10px 30px; }
  .card { padding: 14px; }
}