:root {
  --bg: #eef2ef;
  --surface: #fffef9;
  --ink: #1f2a33;
  --muted: #62717c;
  --line: #d7dde0;
  --accent-soft: #8ecae6;
  --accent: #2f6b95;
  --accent-strong: #184e77;
  --green: #2f8a66;
  --shadow: 0 18px 60px rgba(29, 46, 59, 0.12);
  --font: 'Noto Sans JP', 'Inter', sans-serif;
  --font-display: 'Silkscreen', 'Noto Sans JP', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }

.page-shell { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  min-height: 150px;
  display: grid;
  place-items: center;
  text-align: center;
  border-bottom: 1px solid var(--line);
}

.hero-brand { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.tagline { font-family: var(--font-display); font-size: .86rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.brand-line { display: flex; align-items: center; gap: 9px; }
.wordmark { color: var(--accent-strong); font-family: var(--font-display); font-size: .72rem; font-weight: 700; letter-spacing: .22em; text-transform: uppercase; }
.beta-badge, .canvas-beta { padding: 3px 6px; color: #fff; background: var(--accent-strong); border-radius: 999px; font-family: var(--font-display); font-size: .54rem; font-weight: 700; letter-spacing: .12em; vertical-align: middle; text-transform: uppercase; }
.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  background: rgba(255, 253, 249, .88);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.language-switcher.compact {
  margin-left: 6px;
}
.language-btn {
  min-width: 38px;
  height: 30px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .08em;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}
.language-btn.active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}
.site-footer { color: var(--muted); font-size: .82rem; }

.home-intro { padding: 54px 0 24px; }
.eyebrow { margin-bottom: 10px; color: var(--accent-strong); font-family: var(--font-display); font-size: .72rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.home-intro h1 { font-family: var(--font-display); font-size: clamp(1.25rem, 2.4vw, 1.75rem); letter-spacing: .06em; text-transform: uppercase; }

.canvas-list { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; justify-items: center; }
.project-card {
  display: block;
  width: min(520px, 100%);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
}
.project-card:hover { transform: translateY(-4px); box-shadow: 0 24px 70px rgba(54, 44, 35, .17); }
.project-preview { position: relative; aspect-ratio: 1 / 1; background: #ece8e2; overflow: hidden; }
.project-preview-canvas { width: 100%; height: 100%; display: block; image-rendering: pixelated; background: #fff; }
.project-status-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 9px;
  color: #fff;
  background: var(--ink);
  border-radius: 999px;
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .12em;
}
.start-copy {
  position: absolute;
  left: 50%;
  top: 50%;
  padding: 10px 16px;
  color: #fff;
  background: rgba(39,35,31,.78);
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity .18s ease;
}
.project-card:hover .start-copy,
.project-card:focus-visible .start-copy,
.project-card.is-completed .start-copy { opacity: 1; }
.project-card-body { min-height: 132px; display: flex; flex-direction: column; justify-content: space-between; align-items: center; padding: 24px; text-align: center; }
.project-title-row { display: flex; justify-content: center; align-items: center; width: 100%; }
.project-title-row h2 { font-family: var(--font-display); font-size: 1.45rem; letter-spacing: .06em; text-transform: uppercase; }
.home-progress-row { width: 100%; display: flex; justify-content: space-between; color: var(--muted); font-size: .78rem; }
.home-progress-row strong { color: var(--ink); }
.home-progress-track, .cooldown-track { width: 100%; height: 5px; margin-top: 9px; background: #e7e1da; border-radius: 999px; overflow: hidden; }
.home-progress-fill, #cooldown-fill { width: 0; height: 100%; background: var(--accent-strong); border-radius: inherit; transition: width .25s linear; }

.rules-section { display: flex; justify-content: center; margin: 38px 0; }
.rules-grid {
  display: inline-flex;
  flex-direction: column;
  gap: 12px;
  list-style: none;
}
.rules-grid li {
  width: 100%;
  color: var(--muted);
  font-size: .8rem;
  letter-spacing: .04em;
  line-height: 1.7;
  writing-mode: horizontal-tb;
  text-orientation: mixed;
  text-align: center;
}
.site-footer { margin-top: 50px;padding: 30px 0 50px; border-top: 1px solid var(--line); }

/* Canvas page */
.canvas-page { overflow-x: hidden; overflow-y: auto; background: #e8eef0; }
.canvas-screen { min-height: 100vh; display: flex; flex-direction: column; }
.canvas-header { min-height: 74px; padding: 0 26px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; background: rgba(255,253,249,.92); border-bottom: 1px solid var(--line); z-index: 50; }
.canvas-heading { display: flex; flex-direction: column; align-items: center; gap: 4px; text-align: center; }
.canvas-header h1 { display: flex; align-items: center; gap: 8px; font-family: var(--font-display); font-size: 1.05rem; letter-spacing: .14em; text-transform: uppercase; }
.canvas-beta { letter-spacing: .08em; }
.back-link { width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; }
.canvas-status { justify-self: end; display: flex; align-items: center; gap: 24px; font-size: .74rem; color: var(--muted); }
.online-status { white-space: nowrap; }
.online-dot { display: inline-block; width: 7px; height: 7px; margin-right: 7px; background: var(--green); border-radius: 50%; }
.cooldown-status { width: 130px; }
.cooldown-status > span { display: block; text-align: right; font-size: .63rem; font-weight: 700; letter-spacing: .08em; }
.cooldown-track { margin-top: 5px; height: 4px; }
#cooldown-fill { width: 100%; background: var(--green); }

.canvas-stage { flex: 1; min-height: 0; padding: 24px; display: grid; place-items: center; }
.canvas-wrapper { width: min(1100px, 100%); height: calc(100vh - 122px); position: relative; overflow: hidden; background: linear-gradient(180deg, #d9e4ea 0%, #dbe1db 100%); border-radius: 16px; box-shadow: var(--shadow); }
.canvas-rules {
  position: absolute;
  top: 22px;
  left: 50%;
  width: min(420px, calc(100% - 220px));
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 0;
}
.canvas-rules-grid {
  width: 100%;
  gap: 10px;
}
.canvas-rules-grid li {
  color: rgba(39,35,31,.58);
  font-size: .74rem;
  line-height: 1.6;
}
.canvas-container { position: relative; z-index: 1; width: 100%; height: 100%; padding: 70px; display: flex; overflow: auto; -webkit-overflow-scrolling: touch; }
.canvas-relative-wrapper { position: relative; display: inline-block; margin: auto; flex: 0 0 auto; }
#pixel-canvas { display: block; background: #fff; box-shadow: 0 16px 50px rgba(46,39,33,.2); image-rendering: pixelated; cursor: crosshair; touch-action: pan-x pan-y; }
#empty-highlight-overlay {
  position: absolute;
  inset: 0;
  display: none;
  pointer-events: none;
  image-rendering: pixelated;
  z-index: 2;
}
#empty-highlight-overlay.show { display: block; }
#grid-overlay { position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(to right, rgba(255,255,255,.22) 1px, transparent 1px), linear-gradient(to bottom, rgba(255,255,255,.22) 1px, transparent 1px), linear-gradient(to right, rgba(28,24,21,.16) 2px, transparent 2px), linear-gradient(to bottom, rgba(28,24,21,.16) 2px, transparent 2px); background-size: 1% 1%; opacity: 0; z-index: 1; }
#grid-overlay.show { opacity: 1; }

.canvas-controls { position: absolute; right: 18px; bottom: 18px; display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px; max-width: calc(100% - 36px); padding: 5px; background: rgba(255,253,249,.9); border: 1px solid var(--line); border-radius: 24px; backdrop-filter: blur(10px); z-index: 20; }
.control-btn { min-width: 36px; height: 36px; padding: 0 10px; border: 1px solid var(--line); border-radius: 999px; background-color: #fff; color: var(--muted); font-size: .76rem; font-weight: 700; cursor: pointer; appearance: none; -webkit-appearance: none; }
.canvas-controls .control-btn.active { background-color: var(--accent-strong); border-color: var(--accent-strong); color: #fff; }
@media (hover: hover) and (pointer: fine) {
  .control-btn:hover { border-color: var(--muted); color: var(--ink); }
}
.control-btn,
.reset-btn,
.share-btn,
.timelapse-btn,
.language-btn,
.action-btn,
.online-copy,
.reference-label,
.share-title,
.timelapse-meta,
.confirm-info {
  font-family: var(--font-display);
  text-transform: uppercase;
}
.reset-btn { font-size: .62rem; letter-spacing: .08em; }
.share-btn { padding-inline: 12px; font-size: .65rem; letter-spacing: .1em; }
.timelapse-btn { padding-inline: 14px; font-size: .65rem; letter-spacing: .1em; }

#minimap-container { position: absolute; top: 18px; right: 18px; width: 84px; height: 84px; overflow: hidden; background: #fff; border: 1px solid var(--line); box-shadow: 0 8px 24px rgba(46,39,33,.15); cursor: pointer; z-index: 15; }
#minimap-canvas { width: 100%; height: 100%; display: block; image-rendering: pixelated; }
#minimap-viewport { position: absolute; inset: 0; border: 1.5px solid var(--accent-strong); background: rgba(47,107,149,.12); pointer-events: none; }
.reference-card {
  position: absolute;
  top: 18px;
  left: 18px;
  width: 140px;
  padding: 10px;
  background: rgba(255,253,249,.95);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(46,39,33,.15);
  z-index: 15;
}
.reference-card.is-hidden { display: none; }
.reference-label {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: .6rem;
  font-weight: 700;
  letter-spacing: .14em;
}
.reference-image {
  width: 100%;
  display: block;
  border-radius: 10px;
  background: #0f1720;
}

#selection-cursor { position: absolute; width: 1%; height: 1%; display: none; border: 1.5px solid var(--accent-strong); box-shadow: 0 0 8px rgba(142,202,230,.9); pointer-events: none; z-index: 5; }
.confirm-card { position: absolute; width: 210px; padding: 14px; display: flex; flex-direction: column; gap: 12px; background: rgba(255,253,249,.97); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); opacity: 0; transform: scale(.94); pointer-events: none; transition: opacity .14s ease, transform .14s ease; z-index: 100; }
.confirm-card.show { opacity: 1; transform: scale(1); pointer-events: auto; }
.confirm-info { font-size: .75rem; color: var(--muted); }
.confirm-palette-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  align-items: center;
}
.confirm-color-option {
  width: 24px;
  height: 24px;
  flex: 0 0 24px;
  padding: 0;
  border: 1px solid rgba(31,42,51,.28);
  border-radius: 50%;
  background-clip: padding-box;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  box-shadow: 0 0 0 1px rgba(255,255,255,.34);
  transition: transform .14s ease, box-shadow .14s ease, border-color .14s ease, outline-color .14s ease;
}
.confirm-color-option:hover {
  transform: translateY(-1px) scale(1.04);
  box-shadow: 0 0 0 1px rgba(255,255,255,.44), 0 4px 10px rgba(31,42,51,.14);
}
.confirm-color-option.selected {
  border-color: var(--accent-strong);
  transform: scale(1.18);
  box-shadow: 0 0 0 3px rgba(24,78,119,.18), 0 0 0 1px rgba(255,255,255,.6);
  outline: 1px solid rgba(255,255,255,.82);
  outline-offset: 1px;
}
.confirm-actions { display: flex; gap: 8px; }
.action-btn { flex: 1; padding: 8px; border: 0; border-radius: 999px; font-size: .75rem; font-weight: 700; cursor: pointer; }
.action-btn.confirm { color: #fff; background: var(--accent-strong); }
.action-btn.cancel { color: var(--muted); background: #ebe6df; }
.canvas-message { position: absolute; left: 50%; bottom: 20px; max-width: min(420px, calc(100% - 220px)); padding: 10px 16px; color: #fff; background: rgba(39,35,31,.9); border-radius: 999px; font-size: .76rem; opacity: 0; transform: translate(-50%, 8px); pointer-events: none; transition: .2s ease; z-index: 40; }
.canvas-message.show { opacity: 1; transform: translate(-50%, 0); animation: canvas-message-rise .22s ease; }
.canvas-message[data-position="center"] { top: 50%; bottom: auto; transform: translate(-50%, calc(-50% + 8px)); }
.canvas-message[data-position="center"].show { transform: translate(-50%, -50%); animation: canvas-message-rise-center .22s ease; }
@keyframes canvas-message-rise {
  from {
    opacity: 0;
    transform: translate(-50%, 12px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}
@keyframes canvas-message-rise-center {
  from {
    opacity: 0;
    transform: translate(-50%, calc(-50% + 12px));
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}
.share-panel {
  position: absolute;
  left: 50%;
  bottom: 84px;
  width: min(360px, calc(100% - 24px));
  padding: 16px;
  display: none;
  gap: 12px;
  background: rgba(255,253,249,.98);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  transform: translateX(-50%);
  z-index: 60;
}
.share-panel.show { display: grid; }
.share-title {
  font-size: .95rem;
  font-weight: 700;
}
.share-copy {
  color: var(--muted);
  font-size: .76rem;
  line-height: 1.6;
}
.share-meta {
  color: var(--ink);
  font-size: .75rem;
  font-weight: 600;
}
.share-actions {
  display: flex;
  gap: 8px;
}
.share-close-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: .75rem;
  cursor: pointer;
}
.timelapse-panel {
  position: absolute;
  inset: 18px;
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 16px;
  background: rgba(39,35,31,.82);
  border-radius: 16px;
  z-index: 80;
}
.timelapse-panel.show { display: flex; }
.timelapse-canvas {
  width: min(70vmin, 520px);
  height: min(70vmin, 520px);
  display: block;
  background: #fff;
  image-rendering: pixelated;
  box-shadow: 0 16px 40px rgba(0,0,0,.2);
}
.timelapse-meta {
  color: rgba(255,255,255,.88);
  font-size: .72rem;
  letter-spacing: .06em;
}
.timelapse-progress {
  width: min(70vmin, 520px);
  height: 6px;
  overflow: hidden;
  background: rgba(255,255,255,.16);
  border-radius: 999px;
}
.timelapse-progress-fill {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-soft) 100%);
  border-radius: inherit;
  transition: width .12s linear;
}
.timelapse-actions {
  display: flex;
  gap: 10px;
}
.timelapse-actions .action-btn {
  min-width: 110px;
}

.canvas-container::-webkit-scrollbar { width: 6px; height: 6px; }
.canvas-container::-webkit-scrollbar-thumb { background: rgba(39,35,31,.18); border-radius: 999px; }

@media (max-width: 720px) {
  .site-header { min-height: 126px; }
  .home-intro { padding-top: 42px; }
  .canvas-list { grid-template-columns: 1fr; }
  .project-card-body { padding: 20px; }
  .project-title-row h2 { font-size: 1.45rem; }
  .rules-section { margin-bottom: 30px; }
  .rules-grid { width: min(100%, 32rem); gap: 10px; }
  .rules-grid li { width: 100%; font-size: .72rem; }
  .canvas-header { min-height: 64px; padding: 0 14px; }
  .canvas-status { gap: 10px; }
  .online-status { font-size: .66rem; }
  .online-copy { display: none; }
  .cooldown-status { width: 75px; }
  .language-switcher.compact { margin-left: 0; }
  .language-btn { min-width: 34px; height: 28px; padding: 0 8px; font-size: .66rem; }
  .canvas-stage { padding: 10px; }
  .canvas-wrapper { height: calc(100svh - 84px - env(safe-area-inset-bottom, 0px)); min-height: calc(100svh - 84px - env(safe-area-inset-bottom, 0px)); border-radius: 10px; }
  .canvas-rules { top: 12px; width: min(320px, calc(100% - 160px)); }
  .canvas-rules-grid li { font-size: .68rem; }
  .canvas-container { padding: 46px 20px calc(128px + env(safe-area-inset-bottom, 0px)); }
  #minimap-container { width: 66px; height: 66px; top: 12px; right: 12px; }
  .reference-card { width: 104px; top: 12px; left: 12px; padding: 8px; }
  .canvas-controls { right: 12px; bottom: calc(24px + env(safe-area-inset-bottom, 0px)); max-width: calc(100% - 24px); padding: 6px; border-radius: 18px; }
  .control-btn { min-width: 34px; height: 34px; padding: 0 9px; }
  .timelapse-btn { padding-inline: 12px; }
  .canvas-message { bottom: 64px; max-width: calc(100% - 24px); text-align: center; }
  .share-panel { bottom: calc(96px + env(safe-area-inset-bottom, 0px)); }
  .timelapse-panel { inset: 10px; }
  .timelapse-canvas { width: min(78vw, 420px); height: min(78vw, 420px); }
}

@media (max-width: 480px) {
  .project-card-body { min-height: 190px; }
  .canvas-rules { width: calc(100% - 120px); }
  .canvas-controls { gap: 6px; }
  .control-btn { font-size: .68rem; }
  .share-actions { flex-direction: column; }
  .reset-btn,
  .timelapse-btn { flex: 1 1 calc(50% - 3px); }
  .canvas-container { padding-bottom: calc(176px + env(safe-area-inset-bottom, 0px)); }
}