/* phnx-shikaku styles (shares the sudoku palette)
 *
 * Brand palette mirrors phnx2048 / games-set:
 *   Vivid Tangelo  #EE7526   Primary accent
 *   Mustard        #FBD652   Highlight (selection)
 *   Vermilion      #D74820   Hover/emphasis
 *   Persian Plum   #77161C   Borders, conflict text
 *   Rich Black     #000000   Body text strong
 *   Cream          #F5EEE5   User-entered cell bg
 *   Beige          #EFEDE9   Board interior
 *   Off-white      #F5F5F5   Soft surfaces
 *   Pastel Grey    #5C5C5C   Pencil notes
 *
 * Light theme default. No dark theme — daily puzzle reads cleaner on white.
 */

:root {
  --tangelo:     #EE7526;
  --mustard:     #FBD652;
  --vermilion:   #D74820;
  --plum:        #77161C;
  --rich-black:  #000000;
  --cream:       #F5EEE5;
  --beige:       #EFEDE9;
  --off-white:   #F5F5F5;
  --light-grey:  #F0F0F0;
  --pastel-grey: #5C5C5C;

  --bg:          #FFFFFF;
  --panel:       var(--off-white);
  --panel-2:     #FFFFFF;
  --border:      var(--plum);
  --fg:          var(--pastel-grey);
  --fg-strong:   var(--rich-black);
  --fg-muted:    #8A8A8A;
  --fg-faint:    #BFBFBF;
  --accent:      var(--tangelo);
  --accent-hover:var(--vermilion);
  --highlight:   var(--mustard);

  --radius:    12px;
  --radius-sm: 8px;
  --shadow:    0 6px 20px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100%; }

body {
  background:
    radial-gradient(1100px 500px at 20% -150px, rgba(238, 117, 38, 0.06) 0%, transparent 60%),
    radial-gradient(900px 500px at 110% 0%, rgba(251, 214, 82, 0.08) 0%, transparent 60%),
    var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, sans-serif;
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
  min-height: 100dvh;
}

.wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: 18px 14px 80px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ---- Header ---- */
.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.brand { display: flex; flex-direction: column; gap: 2px; }
.title {
  margin: 0;
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--fg-strong);
}
.title .accent { color: var(--accent); }
.subtitle {
  margin: 0;
  color: var(--fg-faint);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.stats {
  display: flex;
  gap: 8px;
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  min-width: 64px;
}
.stat-label {
  color: var(--fg-faint);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.stat-value {
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--fg-strong);
}

/* ---- Controls ---- */
.controls {
  display: flex;
  gap: 8px;
  align-items: stretch;
  flex-wrap: wrap;
}
.controls.bottom { justify-content: center; }

.btn {
  background: var(--panel-2);
  color: var(--fg-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  font-family: inherit;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease, transform 80ms ease;
}
.btn:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn[aria-pressed="true"],
.btn.active {
  background: var(--accent);
  color: #FFFFFF;
  border-color: transparent;
}
.btn[aria-pressed="true"]:hover,
.btn.active:hover { background: var(--accent-hover); color: #FFFFFF; }

.btn-primary {
  background: var(--accent);
  color: #FFFFFF;
  border-color: transparent;
}
.btn-primary:hover { background: var(--accent-hover); color: #FFFFFF; border-color: transparent; }
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--fg-muted);
}
.btn-ghost:hover { color: var(--fg-strong); border-color: var(--accent); }

/* ---------- Shikaku board ---------- */
.board-wrap { position: relative; display: flex; justify-content: center; margin: 14px 0; }
.board {
  display: grid;
  gap: 2px;
  background: var(--border);
  border: 3px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  width: min(100%, 440px);
  aspect-ratio: var(--cols) / var(--rows);
  grid-template-columns: repeat(var(--cols), 1fr);
  grid-template-rows: repeat(var(--rows), 1fr);
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
.cell {
  position: relative;
  background: var(--beige);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: clamp(12px, 3.2vw, 20px); color: var(--fg-strong);
  transition: background .12s ease;
}
.cell.clue { color: var(--fg-strong); }
.cell.filled { background: var(--tint); }
.cell.preview { background: var(--mustard); }
.cell.bad { box-shadow: inset 0 0 0 3px var(--vermilion); }
.cell.selected { box-shadow: inset 0 0 0 3px var(--accent); }
.cell.covered-clue { color: var(--rich-black); }
.cell.edge-t { border-top: 2px solid rgba(0, 0, 0,.35); }
.cell.edge-b { border-bottom: 2px solid rgba(0, 0, 0,.35); }
.cell.edge-l { border-left: 2px solid rgba(0, 0, 0,.35); }
.cell.edge-r { border-right: 2px solid rgba(0, 0, 0,.35); }
.overlay {
  position: absolute; inset: 0; display: none; align-items: center; justify-content: center; flex-direction: column;
  background: rgba(255,255,255,.88); border-radius: var(--radius-sm); text-align: center;
}
.overlay.show { display: flex; }
.overlay h2 { margin: 0 0 6px; color: var(--accent); font-size: 1.6rem; }
.overlay p { margin: 0; color: var(--fg); }
.foot { margin-top: 14px; }
.hint-text { font-size: .85rem; color: var(--fg); }
.muted { font-size: .75rem; color: var(--fg-muted); }
.board.shake { animation: shake .25s; }
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-4px)} 75%{transform:translateX(4px)} }

/* Dark theme — keyed on html[data-theme="dark"], set by the shared banner.js from the OS preference. */
:root[data-theme="dark"] {
  color-scheme: dark;
  --cream:       #222222;
  --beige:       #1a1a1a;
  --off-white:   #111111;
  --light-grey:  #262626;
  --bg:          #000000;
  --panel:       #111111;
  --panel-2:     #1a1a1a;
  --border:      #5a2a30;
  --fg:          #C9C6BE;
  --fg-strong:   #F5F5F5;
  --fg-muted:    #A8A59C;
  --fg-faint:    #6B6961;
  --shadow:      0 6px 20px rgba(0, 0, 0, 0.45), 0 1px 2px rgba(0, 0, 0, 0.4);
}
:root[data-theme="dark"] body {
  background:
    radial-gradient(1100px 500px at 20% -150px, rgba(238, 117, 38, 0.10) 0%, transparent 60%),
    radial-gradient(900px 500px at 110% 0%, rgba(251, 214, 82, 0.06) 0%, transparent 60%),
    var(--bg);
}
:root[data-theme="dark"] .cell:not(.filled):not(.preview) { background: var(--beige); }
:root[data-theme="dark"] .cell.filled { color: #000000; }
:root[data-theme="dark"] .overlay { background: rgba(0, 0, 0,.9); }

/* ---- shell integration (2026-10-03) ---- */
.g-board-box .board { width: 100%; height: 100%; box-sizing: border-box; max-width: none; aspect-ratio: auto; margin: 0; }
.g-board-box .cell { font-size: clamp(11px, 4.4cqmin, 20px); }
.cell.preview { background: var(--mustard); box-shadow: inset 0 0 0 2px var(--accent); transition: none; }
.cell { transition: none; }
:root[data-theme="dark"] .cell.filled { color: #000000; }
:root[data-theme="dark"] .cell.preview { color: #000000; }
:root[data-theme="dark"] .board .cell.filled, :root[data-theme="dark"] .board .cell.preview { color: #000000 !important; }