/* Every Sudoku — app-specific layout built on the Industry design system (styles.css). */

body { display: flex; flex-direction: column; min-height: 100vh; }

.wrap { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

.eyebrow {
  font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--color-neutral-600);
}

/* — header — */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: var(--color-bg); border-bottom: 1px solid var(--color-divider);
}
.site-header .wrap { height: 60px; display: flex; align-items: center; gap: 32px; }
.brand { display: flex; align-items: baseline; gap: 8px; }
.brand .name { font-family: var(--font-heading); font-weight: 700; font-size: 22px; letter-spacing: 0.04em; }
.site-nav { display: flex; gap: 4px; margin-left: auto; }
.site-nav a {
  position: relative; cursor: pointer; padding: 20px 14px 18px;
  font-family: var(--font-heading); font-weight: 600; font-size: 15px;
  letter-spacing: 0.04em; text-transform: uppercase; color: var(--color-text);
  text-decoration: none; display: inline-block;
}
.site-nav a:hover { color: var(--color-accent-700); }
.site-nav a.active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 0;
  height: 2px; background: var(--color-accent);
}

/* — view switching — */
.view { max-width: 1280px; margin: 0 auto; padding: 24px 24px 64px; display: none; flex: 1; width: 100%; box-sizing: border-box; }
.view.active { display: block; }
#view-how, #view-print, #view-settings { max-width: 1000px; }
#view-print { max-width: 1180px; }
#view-settings { max-width: 820px; }

/* — play: top bar — */
.play-top {
  display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between;
  gap: 16px; margin-bottom: 16px;
}
.play-top h1 { font-size: 34px; margin: 0; letter-spacing: 0.01em; }

.diff-seg { display: flex; border: 1px solid var(--color-divider); }
.diff-seg button {
  background: none; border: 0; cursor: pointer; padding: 9px 16px;
  font-family: var(--font-heading); font-weight: 600; font-size: 14px;
  letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-neutral-700);
  border-right: 1px solid var(--color-divider);
}
.diff-seg button:last-child { border-right: none; }
.diff-seg button.active { background: var(--color-accent); color: var(--color-bg); }
.diff-seg button:hover:not(.active) { background: var(--color-accent-100); }

/* — play layout — */
.play-layout { display: flex; flex-wrap: wrap; gap: 32px; align-items: flex-start; }
.grid-col { flex: 1 1 360px; min-width: 0; max-width: 600px; }
.play-aside { flex: 1 1 240px; min-width: 230px; max-width: 300px; display: flex; flex-direction: column; gap: 20px; }

.grid-frame { padding: 14px; background: #fbfbfc; }

.grid-hint-row {
  display: flex; gap: 24px; margin-top: 14px; font-size: 12px; color: var(--color-neutral-600);
}
.grid-hint-row .right { margin-left: auto; }

/* — sudoku grid — */
.sudoku-grid {
  display: grid; grid-template-columns: repeat(9, minmax(0, 1fr));
  border: 2px solid var(--color-text);
}
.sudoku-cell {
  position: relative; display: flex; align-items: center; justify-content: center;
  aspect-ratio: 1; box-sizing: border-box; cursor: pointer; user-select: none;
  font-family: var(--font-heading); font-weight: 600;
  font-size: calc(clamp(13px, 2.2vw, 22px) * var(--cell-scale, 1));
  color: var(--color-text); background: transparent;
  border-right: 1px solid var(--color-neutral-300);
  border-bottom: 1px solid var(--color-neutral-300);
}
.sudoku-cell.b-r { border-right: 2px solid var(--color-text); }
.sudoku-cell.b-b { border-bottom: 2px solid var(--color-text); }
.sudoku-cell.b-r-none { border-right: none; }
.sudoku-cell.b-b-none { border-bottom: none; }
.sudoku-cell.given { color: var(--color-text); font-weight: 700; }
.sudoku-cell.user-val { color: var(--color-accent-700); font-weight: 500; }
.sudoku-cell.peer { background: var(--color-accent-100); }
.sudoku-cell.selected { background: var(--color-accent-200); }
.sudoku-cell.error { color: #8f4a4f; font-weight: 600; background: rgba(166, 89, 89, 0.13); }
.sudoku-cell:focus-visible { outline: 2px solid var(--color-accent); outline-offset: -2px; z-index: 1; }

.sudoku-marks {
  position: absolute; inset: 0; display: grid;
  grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr);
  padding: 3px; box-sizing: border-box;
}
.sudoku-marks span {
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-body); font-weight: 500; line-height: 1;
  font-size: calc(clamp(8px, 1.4vw, 11px) * var(--cell-scale, 1));
  color: var(--color-neutral-600);
}

/* — number pad — */
.pad-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.pad-btn {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px; padding: 10px 0; cursor: pointer;
  background: transparent; border: 1px solid var(--color-divider); border-radius: var(--radius-md);
  color: var(--color-text); font-family: var(--font-body);
}
.pad-btn:hover:not(.done) { background: color-mix(in srgb, var(--color-text) 6%, transparent); }
.pad-btn .n { font-family: var(--font-heading); font-weight: 600; font-size: 24px; line-height: 1; }
.pad-btn .left { font-size: 10px; color: var(--color-neutral-600); line-height: 1; }
.pad-btn.done { background: var(--color-neutral-200); opacity: 0.5; }
.pad-btn.pencil-mode { border-color: var(--color-accent); }

/* — tools — */
.tools-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.tool-btn { justify-content: flex-start; width: 100%; }
.tool-btn.active {
  border-color: var(--color-accent) !important; background: var(--color-accent-100) !important;
  color: var(--color-accent-800) !important;
}
.btn-block { width: 100%; }

/* — share / stats cards — */
.share-card, .stats-card, .timer-card { padding: 16px; }
.timer-card { padding: 16px; }
.timer-value { font-family: var(--font-heading); font-weight: 600; font-size: 44px; line-height: 1.05; font-variant-numeric: tabular-nums; }
.timer-actions { display: flex; gap: 8px; margin-top: 10px; }

.share-row { display: flex; gap: 6px; align-items: center; }
.share-row .input { flex: 1; font-size: 12px; min-width: 0; }
.status-line { font-size: 12px; color: var(--color-neutral-600); margin-top: 8px; min-height: 16px; }

.stat-row {
  display: flex; justify-content: space-between; padding: 6px 0;
  border-bottom: 1px solid var(--color-divider); font-variant-numeric: tabular-nums;
}
.stat-row.no-border { border-bottom: none; }

/* — how to play — */
.how-hero p { max-width: 60ch; color: var(--color-neutral-700); font-size: 16px; }
.how-grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 36px 0 48px; }
.how-grid3 .blueprint { padding: 18px; }
.how-grid3 .num { font-family: var(--font-heading); font-size: 30px; color: var(--color-accent); line-height: 1; }
.how-cols { display: grid; grid-template-columns: minmax(0, 320px) minmax(0, 1fr); gap: 40px; align-items: start; }
.how-diagram { padding: 12px; background: #fbfbfc; }
.how-techniques { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--color-divider); }
.how-techniques > div { padding: 16px 0; border-bottom: 1px solid var(--color-divider); }

/* — print view — */
.print-cols { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; align-items: start; }
.print-preview-frame {
  background: #ffffff; border: 1px solid var(--color-divider); box-shadow: var(--shadow-md);
  padding: 56px; aspect-ratio: 8.5 / 11; max-width: 660px; display: flex; flex-direction: column;
}
.print-preview-frame .head {
  display: flex; justify-content: space-between; align-items: baseline;
  border-bottom: 2px solid var(--color-text); padding-bottom: 10px;
}
.print-preview-frame .grid-wrap { flex: 1; display: flex; align-items: center; justify-content: center; padding: 24px 0; }
.print-preview-frame .foot {
  display: flex; justify-content: space-between; font-size: 11px; color: var(--color-neutral-600);
  border-top: 1px solid var(--color-divider); padding-top: 8px;
}
.print-sudoku-grid { display: grid; grid-template-columns: repeat(9, 1fr); border: 2px solid #1d1f20; width: 100%; max-width: 440px; }
.print-sudoku-grid .cell {
  aspect-ratio: 1; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-heading); font-weight: 600; font-size: clamp(14px, 2.4vw, 24px); color: #1d1f20;
  box-sizing: border-box; border-right: 1px solid #b7b7ba; border-bottom: 1px solid #b7b7ba;
}
.print-sudoku-grid .cell.b-r { border-right: 2px solid #1d1f20; }
.print-sudoku-grid .cell.b-b { border-bottom: 2px solid #1d1f20; }
.print-sudoku-grid .cell.b-r-none { border-right: none; }
.print-sudoku-grid .cell.b-b-none { border-bottom: none; }
.print-sheet-card { padding: 16px; }

/* — range input (digit size) — */
input[type="range"] {
  -webkit-appearance: none; appearance: none; background: transparent; min-height: auto; padding: 0;
  border: none;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 3px; background: var(--color-divider); border-radius: var(--radius-sm);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; margin-top: -8px;
  width: 19px; height: 19px; border-radius: 50%;
  background: var(--color-accent); border: 2px solid var(--color-bg); box-shadow: 0 0 0 1px var(--color-accent);
  cursor: pointer;
}
input[type="range"]::-moz-range-track {
  height: 3px; background: var(--color-divider); border-radius: var(--radius-sm);
}
input[type="range"]::-moz-range-thumb {
  width: 15px; height: 15px; border-radius: 50%; border: 2px solid var(--color-bg);
  background: var(--color-accent); box-shadow: 0 0 0 1px var(--color-accent); cursor: pointer;
}
input[type="range"]:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; }

/* — settings — */
.settings-list { border-top: 1px solid var(--color-divider); }
.settings-row {
  display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 24px; align-items: center;
  padding: 18px 0; border-bottom: 1px solid var(--color-divider);
}
.settings-row h4 { font-size: 18px; margin: 0 0 2px; }
.settings-row p { margin: 0; font-size: 14px; color: var(--color-neutral-700); }
.settings-actions { display: flex; gap: 8px; margin-top: 24px; }

/* — footer — */
footer { border-top: 1px solid var(--color-divider); margin-top: auto; }
.footer-wrap { padding: 24px; display: flex; gap: 24px; flex-wrap: wrap; font-size: 12px; color: var(--color-neutral-600); }
.footer-wrap .right { margin-left: auto; }

/* — win dialog — */
.dialog-backdrop[hidden] { display: none; }
#win-body { font-variant-numeric: tabular-nums; }

/* — analytics consent banner — */
.consent-banner {
  position: fixed; right: 16px; bottom: 16px; left: 16px; z-index: 30;
  max-width: 460px; margin-left: auto; padding: 16px; box-sizing: border-box;
  background: var(--color-bg); box-shadow: var(--shadow-md);
}
.consent-banner[hidden] { display: none; }
.consent-banner p { margin: 0 0 12px; font-size: 14px; color: var(--color-neutral-700); }
.consent-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* — pause overlay — */
.pause-overlay {
  position: absolute; inset: 14px; display: flex; align-items: center; justify-content: center;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent); backdrop-filter: blur(5px);
  font-family: var(--font-heading); font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.08em; font-size: 14px; color: var(--color-neutral-700); cursor: pointer;
}
.pause-overlay[hidden] { display: none; }

/* — strict-mode reject feedback — */
@keyframes cell-shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}
.sudoku-cell.shake { animation: cell-shake 0.4s; background: rgba(166, 89, 89, 0.13); }

/* — print sheet (used only by window.print) — */
.print-sheet { display: none; }
@media print {
  body > *:not(.print-sheet) { display: none !important; }
  .print-sheet { display: block !important; }
  .print-sheet .ps-page { padding: 0.5in; }
  .print-sheet .ps-page + .ps-page { page-break-before: always; }
  .print-sheet .head {
    display: flex; justify-content: space-between; align-items: baseline;
    border-bottom: 2px solid #1d1f20; padding-bottom: 10px; margin-bottom: 24px;
    font-family: var(--font-heading);
  }
  .print-sheet .grid-wrap { display: flex; justify-content: center; }
  .print-sheet .ps-marks {
    position: absolute; inset: 0; display: grid;
    grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr);
    padding: 2px; box-sizing: border-box; pointer-events: none;
  }
  .print-sheet .ps-marks span {
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-body); font-weight: 500; line-height: 1; font-size: 7px; color: #7a7a7d;
  }
}

@media (max-width: 640px) {
  .site-header .wrap { gap: 12px; padding: 0 16px; }
  .site-nav a { padding: 20px 8px 18px; font-size: 13px; }
  .view { padding: 16px 16px 48px; }
  .play-top h1 { font-size: 26px; }
  .diff-seg button { padding: 8px 10px; font-size: 12px; }
  .how-grid3 { grid-template-columns: 1fr; }
  .how-cols { grid-template-columns: 1fr; }
  .print-cols { grid-template-columns: 1fr; }
  .settings-row { grid-template-columns: 1fr; gap: 10px; }
}