/* "Daylight workshop" direction (board issue #21, design role proposal):
   overworld-daylight palette — sky page, white panels, grass-green action,
   coin-gold highlight. Game-sprite vernacular via color memory and hard
   pixel edges, not literal retro chrome. All text colors AA-checked. */
:root {
  --bg: #E3EFF6;
  --panel: #FFFFFF;
  --panel-2: #F2F6F9;
  --ink: #1F2E38;
  --muted: #4F6070;
  --accent: #0E7A44;        /* text/border-safe grass green */
  --accent-bright: #31C56D; /* fill-only green — never text on light */
  --accent2: #8F6400;       /* text-safe amber */
  --gold: #F6C544;          /* decorative coin-gold, fill-only */
  --danger: #C63A2B;
  --line: #D3E1EA;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.55 system-ui, "Segoe UI", sans-serif;
  /* sky fading to a faint grass-tinted horizon */
  background: linear-gradient(180deg, #CFE8F7 0%, #E9F2F6 55%, #EAF3EC 100%) fixed;
  color: var(--ink);
  min-height: 100vh;
}

header { padding: 2.5rem 1.5rem 1.5rem; text-align: center; }
.wordmark { font-size: 1.8rem; font-weight: 700; letter-spacing: 0.02em; margin: 0 0 0.35rem; }
.wordmark .vivid { color: var(--accent); }
.wordmark .spark {
  width: 0.9em; height: 0.9em;
  vertical-align: -0.08em;
  margin-right: 0.4rem;
}
.tagline { color: var(--muted); margin: 0; font-size: 0.95rem; }

main { width: min(1080px, 100% - 3rem); margin: 0 auto 4rem; }

/* Three-stage progression — locked stages are visibly locked, never faked */
.stages {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.stage {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  box-shadow: 0 2px 8px rgba(31, 46, 56, 0.07);
}
.stage h2 { font-size: 0.92rem; margin: 0 0 0.15rem; }
/* Hard-edged chips — a nod to the pixel grid without being literal */
.stage .num {
  display: inline-block;
  width: 1.35rem; height: 1.35rem; line-height: 1.35rem;
  text-align: center; border-radius: 2px;
  background: #E3F4EA; color: var(--accent);
  font-size: 0.75rem; font-weight: 700; margin-right: 0.4rem;
}
.stage.locked .num { background: var(--panel-2); color: var(--muted); }
.stage-state { font-size: 0.75rem; color: var(--muted); }
.stage:not(.locked) .stage-state { color: var(--accent); }
.stage.locked { opacity: 0.7; }

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem;
  box-shadow: 0 2px 8px rgba(31, 46, 56, 0.07);
}
.panel h3 { margin: 0 0 0.75rem; font-size: 1rem; }
.hint { color: var(--muted); font-size: 0.82rem; margin: 0.35rem 0 0.9rem; }

#prompt {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
  padding: 0.7rem 0.85rem;
  min-height: 4.2rem;
  resize: vertical;
}
#prompt:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.examples { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.6rem 0 1rem; }
.example {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
  padding: 0.25rem 0.7rem;
  cursor: pointer;
  transition: transform 0.1s ease, border-color 0.1s ease, color 0.1s ease;
}
.example:hover {
  color: var(--ink);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.selector-group {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0;
  padding: 0.8rem 0 0.4rem;
}
.selector-group legend {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 0 0 0.3rem;
}
.option {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
  padding: 0.35rem 0.4rem;
  border-radius: 8px;
  cursor: pointer;
}
.option:hover { background: var(--panel-2); }
.option input { margin-top: 0.3rem; accent-color: var(--accent-bright); }
.option-text { display: flex; flex-direction: column; }
.option-text strong { font-size: 0.88rem; }
.option-text small { color: var(--muted); font-size: 0.78rem; }

.actions { margin-top: 1rem; }
/* Game-button feel: pressed edge + 1px travel on click */
#generate {
  background: var(--accent-bright);
  border: none;
  border-radius: 2px;
  color: #08331C;
  font: inherit;
  font-weight: 700;
  padding: 0.65rem 1.4rem;
  cursor: pointer;
  box-shadow: 0 2px 0 var(--accent);
}
#generate:hover { background: #3BD57A; }
#generate:active { transform: translateY(1px); box-shadow: 0 1px 0 var(--accent); }
#generate:disabled { opacity: 0.6; cursor: wait; }

.status { margin-top: 0.9rem; font-size: 0.86rem; min-height: 1.3rem; }
.status.info { color: var(--accent2); }
.status.working { color: var(--muted); }
.status.ok { color: var(--accent); }
.status.error { color: var(--danger); }

/* Alpha-checkerboard — the universal "transparent PNG" surface. It teaches
   what the transparent-background default means before the first render. */
.result-empty {
  border: 1px dashed var(--line);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
  background-image:
    linear-gradient(45deg, #DEE7EE 25%, transparent 25%, transparent 75%, #DEE7EE 75%),
    linear-gradient(45deg, #DEE7EE 25%, transparent 25%, transparent 75%, #DEE7EE 75%);
  background-size: 16px 16px;
  background-position: 0 0, 8px 8px;
}

.placeholder-sprites {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin: 0 0 1rem;
}
.placeholder-sprites svg {
  width: 64px;
  height: 64px;
  shape-rendering: crispEdges;
}
.placeholder-caption {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.75rem;
}

@media (prefers-reduced-motion: no-preference) {
  #ph-slime {
    animation: squash 5s ease-in-out infinite;
    transform-origin: bottom;
  }
  @keyframes squash {
    0%, 88%, 100% { transform: scaleY(1); }
    92% { transform: scaleY(0.88) translateY(4px); }
    96% { transform: scaleY(1.04); }
  }
}

.result-sprite {
  display: block;
  max-width: 100%;
  margin: 0 auto;
}

@media (max-width: 820px) {
  .workspace { grid-template-columns: 1fr; }
  .stages { grid-template-columns: 1fr; }
}