/* ==========================================================================
   ICHI - feuille de style commune. Papier, encre, un seul accent vermillon.
   ========================================================================== */

:root {
  --paper:        #f2ede1;
  --paper-deep:   #e5dcc9;
  --paper-card:   #f7f3e9;
  --sumi:         #14110f;
  --sumi-soft:    #4a433d;
  --wash:         #8a827a;
  --vermillion:   #c0341d;
  --vermillion-2: #d9603f;
  --rule:         rgba(20, 17, 15, 0.16);

  --serif: "Zen Old Mincho", "Hiragino Mincho ProN", Georgia, "Times New Roman", serif;
  --sans:  system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono:  ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--paper);
  color: var(--sumi);
  font-family: var(--sans);
  overflow: hidden;
}

/* Grain de papier : une trame legere posee sur toute la page. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9;
  opacity: 0.5;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(20,17,15,0.028) 0 1px, transparent 1px),
    radial-gradient(circle at 70% 60%, rgba(20,17,15,0.022) 0 1px, transparent 1px),
    radial-gradient(circle at 45% 85%, rgba(20,17,15,0.02) 0 1px, transparent 1px);
  background-size: 7px 7px, 11px 11px, 13px 13px;
}

.hidden { display: none !important; }

#gl, #hud {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
#gl { z-index: 1; cursor: crosshair; }
#hud { z-index: 2; pointer-events: none; }

/* ---------------------------------------------------------------- Menu -- */
#menu {
  position: relative;
  z-index: 3;
  height: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
  overflow-y: auto;
}

.paper {
  width: min(920px, 100%);
  background: var(--paper-card);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 38px 44px 34px;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.7) inset,
    0 18px 50px -28px rgba(20,17,15,0.45);
}

.brand { display: flex; align-items: center; gap: 24px; }

.kanji {
  font-family: var(--serif);
  font-size: 76px;
  line-height: 0.9;
  color: var(--sumi);
  width: 86px;
  height: 86px;
  display: grid;
  place-items: center;
  border: 2px solid var(--vermillion);
  border-radius: 3px;
  flex: none;
}

.titles h1 {
  font-family: var(--serif);
  font-size: 46px;
  letter-spacing: 0.22em;
  margin: 0 0 4px;
  font-weight: 600;
}

.tagline {
  margin: 0;
  color: var(--sumi-soft);
  font-size: 14.5px;
  max-width: 46ch;
}

/* Trait de pinceau : epais au milieu, effile aux extremites. */
.stroke {
  height: 7px;
  margin: 26px 0 24px;
  background: var(--sumi);
  clip-path: polygon(0 46%, 6% 18%, 22% 6%, 48% 0, 74% 8%, 92% 24%, 100% 52%,
                     94% 82%, 72% 96%, 46% 100%, 20% 92%, 5% 74%);
  opacity: 0.88;
}
.stroke.thin { height: 4px; margin: 26px 0 22px; opacity: 0.4; }

.row { margin-bottom: 22px; }

.cols { display: flex; gap: 30px; align-items: stretch; }
.cols .col { flex: 1; min-width: 0; }
.sep { width: 1px; background: var(--rule); flex: none; }

h2 {
  font-family: var(--serif);
  font-size: 19px;
  margin: 0 0 6px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.hint {
  color: var(--wash);
  font-size: 13px;
  margin: 0 0 14px;
  line-height: 1.5;
}
.hint.links { margin-top: 18px; }
.hint a { color: var(--sumi-soft); text-decoration: none; border-bottom: 1px solid var(--rule); }
.hint a:hover { color: var(--vermillion); border-color: var(--vermillion); }

label {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--wash);
  margin: 12px 0 6px;
}
label.check {
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: none;
  letter-spacing: 0;
  font-size: 13px;
  color: var(--sumi-soft);
  margin-top: 14px;
}
label.check input { width: auto; margin: 0; }

input[type="text"], input:not([type]), select, input.code {
  width: 100%;
  padding: 11px 13px;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--sumi);
  background: #fdfbf5;
  border: 1px solid var(--rule);
  border-radius: 2px;
  outline: none;
  transition: border-color 0.15s;
}
input:focus, select:focus { border-color: var(--vermillion); }

input.code {
  font-family: var(--mono);
  font-size: 26px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  text-align: center;
  padding: 10px 13px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--vermillion);
  margin: 2px 0 4px;
}

button {
  width: 100%;
  margin-top: 16px;
  padding: 13px 18px;
  font-family: var(--serif);
  font-size: 16px;
  letter-spacing: 0.14em;
  color: var(--sumi);
  background: transparent;
  border: 1.5px solid var(--sumi);
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
button:hover { background: var(--sumi); color: var(--paper-card); }
button.primary { border-color: var(--vermillion); color: var(--vermillion); }
button.primary:hover { background: var(--vermillion); color: var(--paper-card); }

.error {
  margin: 16px 0 0;
  padding: 10px 13px;
  background: rgba(192, 52, 29, 0.08);
  border-left: 3px solid var(--vermillion);
  color: var(--vermillion);
  font-size: 13.5px;
}

.keys { list-style: none; margin: 0; padding: 0; }
.keys li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 5px 0;
  font-size: 13px;
  color: var(--sumi-soft);
  border-bottom: 1px dotted rgba(20,17,15,0.10);
}
.keys li:last-child { border-bottom: 0; }
.keys b {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--sumi);
  background: rgba(20,17,15,0.055);
  padding: 2px 7px;
  border-radius: 2px;
  white-space: nowrap;
  flex: none;
}
.keys span { color: var(--wash); }

.cols.bottom { margin-top: 4px; }

/* --------------------------------------------------------------- Pause -- */
/* Se superpose au jeu (HUD z-index 2, menu 3) sans le fermer : la partie
   continue derriere le voile. */
#pause {
  position: fixed;
  inset: 0;
  z-index: 5;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(20, 17, 15, 0.46);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}
.pause-card {
  width: min(380px, 100%);
  padding: 28px 32px 24px;
}
.pause-card h2 {
  font-size: 24px;
  letter-spacing: 0.14em;
  margin-bottom: 4px;
}

@media (max-width: 780px) {
  .paper { padding: 26px 22px; }
  .cols { flex-direction: column; gap: 22px; }
  .sep { width: auto; height: 1px; }
  .brand { gap: 16px; }
  .kanji { width: 62px; height: 62px; font-size: 52px; }
  .titles h1 { font-size: 34px; }
}