@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@500;600;700&display=swap');
/* iConcept — game styles. Tokens follow design/index.html (od web-prototype seed). */
:root {
  --bg:      #faf7f0;
  --surface: #ffffff;
  --fg:      #221c15;
  --muted:   #6f675c;
  --border:  #e7dfcf;
  --accent:  #b3402a;
  --accent-soft: color-mix(in oklch, var(--accent) 14%, transparent);
  --fg-soft:     color-mix(in oklch, var(--fg) 6%, transparent);
  --font-display: 'Iowan Old Style', 'Charter', Georgia, 'Hiragino Mincho ProN', 'Yu Mincho', 'Noto Serif JP', serif;
  --font-body:    -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', Meiryo, system-ui, sans-serif;
  --font-mono:    ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
  --fs-h1: clamp(34px, 4.6vw, 56px);
  --fs-h2: clamp(26px, 3.2vw, 38px);
  --gap-sm: 12px; --gap-md: 20px; --gap-lg: 32px; --gap-xl: 56px;
  --container: 1020px;
  --gutter: 24px;
  --radius: 10px;
  --radius-lg: 16px;
  color-scheme: light;
}
* , *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
h1, h2 { text-wrap: balance; }
button:focus-visible, a:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }

.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.row { display: flex; align-items: center; gap: var(--gap-md); }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--gap-md); flex-wrap: wrap; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap-lg); }
@media (max-width: 920px) { .grid-2 { grid-template-columns: 1fr; } }

h1 { font-family: var(--font-display); font-size: var(--fs-h1); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 var(--gap-md); }
h2 { font-family: var(--font-display); font-size: var(--fs-h2); line-height: 1.2; letter-spacing: -0.015em; margin: 0; }
.lead { font-size: 18px; line-height: 1.7; color: var(--muted); max-width: 58ch; margin: 0; }
.eyebrow {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 var(--gap-md);
}
.meta { font-family: var(--font-mono); font-size: 13px; color: var(--muted); }
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* chrome */
.topnav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in oklch, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.topnav-inner { display: flex; align-items: center; justify-content: space-between; padding-block: 12px; }
.logo { font-family: var(--font-display); font-size: 19px; font-weight: 600; letter-spacing: -0.01em; }
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px;
  background: var(--fg-soft); color: var(--muted);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em;
}
.pill.ready { background: var(--accent-soft); color: var(--accent); }
.pagefoot { padding-block: var(--gap-lg); color: var(--muted); font-size: 13px; border-top: 1px solid var(--border); margin-top: var(--gap-xl); }
.pagefoot .row-between { flex-wrap: wrap; gap: var(--gap-sm); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: var(--radius);
  border: 1px solid transparent; font-size: 15px; font-weight: 500;
  transition: transform 0.05s ease, background 0.15s ease, border-color 0.15s ease;
  min-height: 44px;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--surface); border-color: var(--accent); }
.btn-primary:hover { background: color-mix(in oklch, var(--accent) 88%, black); }
.btn-secondary { background: transparent; color: var(--fg); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--fg); }
.btn-ghost { background: transparent; color: var(--muted); border-color: transparent; padding-inline: 10px; }
.btn-ghost:hover { color: var(--accent); }
.btn:disabled { opacity: 0.45; cursor: default; }
.btn.busy { position: relative; color: transparent !important; }
.btn.busy::after {
  content: ''; position: absolute; inset: 0; margin: auto;
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid color-mix(in oklch, var(--accent) 35%, transparent);
  border-top-color: var(--accent);
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* title screen */
.hero { padding-block: clamp(48px, 7vw, 96px) var(--gap-lg); }
.hero-center { text-align: center; max-width: 40ch; margin: 0 auto var(--gap-xl); }
.theme-cards { margin-bottom: var(--gap-xl); }
.theme-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  text-align: left; display: flex; flex-direction: column; gap: 10px;
  transition: border-color 0.15s ease, transform 0.05s ease;
}
.theme-card:hover { border-color: var(--accent); }
.theme-card:active { transform: translateY(1px); }
.theme-card .tc-head { display: flex; align-items: center; justify-content: space-between; gap: var(--gap-sm); }
.theme-card h3 { font-family: var(--font-display); font-size: 24px; margin: 0; }
.theme-card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.tag {
  display: inline-flex; align-items: center; padding: 3px 10px;
  color: var(--muted); border: 1px solid var(--border); border-radius: 999px;
  font-family: var(--font-mono); font-size: 12px;
}
.howto { display: flex; justify-content: center; gap: var(--gap-sm); flex-wrap: wrap; margin-bottom: var(--gap-md); }
.howto-step {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border); border-radius: 999px;
  padding: 7px 16px; font-size: 13.5px; color: var(--muted); background: var(--surface);
}
.howto-step .num { color: var(--accent); font-size: 12px; }
.credit { text-align: center; color: var(--muted); font-size: 12px; max-width: 60ch; margin: 0 auto; }

/* play screen */
.play-head { margin-bottom: var(--gap-lg); }
.play-head .row { flex-wrap: wrap; }
.hintboard {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap-md);
  margin-bottom: var(--gap-md);
}
@media (max-width: 920px) { .hintboard { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) {
  .hintboard { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .tile { padding: 12px 6px; gap: 6px; }
  .tile .tile-icon { width: 30px; height: 30px; }
  .tile .tile-label { font-size: 11.5px; }
}
.tile {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 18px 14px;
  display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center;
}
.deal { animation: deal 0.35s ease both; }
@keyframes deal { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.tile .tile-icon { width: 42px; height: 42px; color: var(--fg); }
.tile-icon svg { width: 100%; height: 100%; }
.tile .tile-label { font-size: 13.5px; font-weight: 600; line-height: 1.4; }
.badge {
  display: inline-flex; align-items: center; padding: 2px 9px;
  border: 1px solid var(--border); border-radius: 999px;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.06em; color: var(--muted);
}
.badge.strong { border-color: color-mix(in oklch, var(--accent) 45%, var(--border)); color: var(--accent); }
.board-foot { margin-bottom: var(--gap-lg); }

.guess { padding: 22px; }
.guess-row { display: flex; gap: var(--gap-sm); }
.input {
  flex: 1; min-width: 0; padding: 11px 14px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); color: var(--fg); font: inherit; font-size: 15px; min-height: 44px;
}
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.input:disabled { opacity: 0.6; }
.feedback { margin: 12px 0 0; font-size: 14.5px; min-height: 1.6em; }
.feedback.ok { color: var(--accent); font-weight: 600; }
.feedback.err { color: var(--muted); }
.history { list-style: none; margin: 12px 0 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.chip {
  display: flex; align-items: baseline; gap: 10px;
  border: 1px solid var(--border); border-left: 3px solid var(--border);
  border-radius: var(--radius); padding: 9px 14px; font-size: 14px;
  animation: deal 0.25s ease both;
}
.chip .chip-guess { font-weight: 600; overflow-wrap: anywhere; }
.chip .chip-out { margin-left: auto; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; color: var(--muted); white-space: nowrap; }
.chip-correct { border-left-color: var(--accent); }
.chip-near   { border-left-color: color-mix(in oklch, var(--accent) 55%, var(--border)); }
.chip-wrong  { border-left-color: var(--border); }
.chip-unknown{ border-left-color: var(--border); border-left-style: dashed; }

/* result overlay */
.overlay {
  position: fixed; inset: 0; z-index: 20;
  background: color-mix(in oklch, var(--fg) 40%, transparent);
  display: grid; place-items: center; padding: var(--gap-md);
}
.overlay-card { max-width: 460px; width: 100%; padding: 30px; text-align: center; }
#result-verdict { margin-bottom: var(--gap-md); }
.result-answer { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 18px 0; margin-bottom: var(--gap-md); }
.answer-name { font-family: var(--font-display); font-size: 30px; line-height: 1.3; }
.flavor { color: var(--muted); font-size: 14px; margin: 8px 0 0; }
.stats { display: flex; justify-content: center; gap: var(--gap-lg); margin: 0 0 var(--gap-lg); padding: 0; }
.stats div { text-align: center; }
.stats dt { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; color: var(--muted); margin: 0 0 4px; }
.stats dd { margin: 0; font-family: var(--font-display); font-size: 26px; }
.result-actions { justify-content: center; flex-wrap: wrap; }

/* ---- multiplayer room ---- */
.gate { max-width: 880px; padding-block: clamp(36px, 5vw, 64px) var(--gap-lg); }
.rules-box {
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--surface); padding: 18px 22px;
  font-size: 14.5px; color: var(--muted); margin: var(--gap-md) 0 var(--gap-lg);
}
.rules-box ul { margin: 0; padding-left: 1.2em; }
.rules-box li + li { margin-top: 6px; }
.gate-cards { margin-bottom: var(--gap-md); }
.gate-cards h3 { font-family: var(--font-display); font-size: 20px; margin: 0 0 14px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 13px; color: var(--muted); }
select.input { appearance: auto; }
.code-line { display: flex; align-items: center; gap: var(--gap-sm); flex-wrap: wrap; margin: 10px 0 18px; }
.code {
  font-family: var(--font-mono); font-size: clamp(26px, 4.5vw, 38px);
  letter-spacing: 0.18em; font-weight: 600;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); padding: 6px 18px;
}
.playerlist { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.playerlist li {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 8px 14px; background: var(--surface); font-size: 14.5px;
}
.playerlist .wins { margin-left: auto; font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
.tag-you, .tag-host {
  font-family: var(--font-mono); font-size: 10.5px;
  color: var(--accent); border: 1px solid color-mix(in oklch, var(--accent) 45%, var(--border));
  border-radius: 999px; padding: 1px 8px;
}
button.tile { cursor: pointer; text-align: center; }
button.tile:not(:disabled):hover { border-color: var(--accent); }
button.tile:disabled { cursor: default; }
.tile .level {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em;
  padding: 2px 9px; border-radius: 999px; border: 1px solid var(--border);
}
.lv5 { background: var(--accent); border-color: var(--accent); color: var(--surface); }
.lv4 { background: color-mix(in oklch, var(--accent) 65%, transparent); border-color: transparent; color: var(--surface); }
.lv3 { background: color-mix(in oklch, var(--accent) 40%, transparent); border-color: transparent; color: var(--fg); }
.lv2 { background: color-mix(in oklch, var(--accent) 18%, transparent); border-color: transparent; color: var(--fg); }
.lv1 { background: transparent; color: var(--muted); }
.lv0 { background: transparent; border-style: dashed; color: var(--muted); }
.scorebar { display: flex; flex-wrap: wrap; gap: 8px; }
.scorebar .sc {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border); background: var(--surface);
  border-radius: 999px; padding: 4px 12px; font-size: 12.5px;
}
.feed-label { font-size: 13px; color: var(--muted); margin: 14px 0 6px; font-weight: 600; }
.mp-entry { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; margin-bottom: var(--gap-md); }
.end-card { max-width: 560px; margin-inline: auto; text-align: center; padding: 32px; }
.end-card .playerlist { text-align: left; }

/* マルチプレイ盤: 全アイコンの一覧性優先（高密度表示） */
#mp-board { grid-template-columns: repeat(6, 1fr); gap: 8px; }
#mp-board .tile { padding: 10px 6px; gap: 6px; }
#mp-board .tile .tile-icon { width: 30px; height: 30px; }
#mp-board .tile .tile-label { font-size: 11px; line-height: 1.25; }
#mp-board .tile .level { font-size: 9.5px; padding: 1px 6px; }
@media (max-width: 920px) { #mp-board { grid-template-columns: repeat(5, 1fr); } }
@media (max-width: 640px) {
  #mp-board { grid-template-columns: repeat(4, 1fr); gap: 6px; }
  #mp-board .tile { padding: 8px 4px; gap: 5px; }
  #mp-board .tile .tile-icon { width: 26px; height: 26px; }
  #mp-board .tile .tile-label { font-size: 10px; }
}