@import url("https://fonts.googleapis.com/css2?family=Playfair+Display:wght@600&family=Space+Grotesk:wght@400;600;700&display=swap");

:root {
  --bg: #f7f3ec;
  --bg-pattern: radial-gradient(circle at 20px 20px, rgba(0, 93, 170, 0.05) 0, rgba(0, 93, 170, 0.05) 12px, transparent 12px, transparent 100%);
  --panel: #ffffff;
  --border: #d6d7da;
  --text: #1f2933;
  --muted: #5f6b76;
  --accent: #0d5d9a;
  --accent-soft: #d5e7f7;
  --danger: #c0392b;
  --shadow: 0 16px 40px rgba(17, 24, 39, 0.12);
  --radius: 14px;
  --tile-blue: #2d6cdf;
  --tile-yellow: #f2c94c;
  --tile-red: #e74c3c;
  --tile-black: #27303a;
  --tile-teal: #2ab3a7;
  --tile-empty: #f0f2f5;
  --grid-gap: 10px;
  font-family: "Space Grotesk", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  font-size: 15px;
}

* { box-sizing: border-box; }

.hidden { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  position: relative;
  line-height: 1.5;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: var(--bg-pattern);
  background-size: 64px 64px;
  opacity: 0.6;
  pointer-events: none;
}

.app-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 18px 32px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.hero {
  background: linear-gradient(135deg, #fdfbf7, #eef3f8);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px 26px;
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  font-size: 15px;
}

.hero-text h1 { margin: 0; font-size: 32px; letter-spacing: -0.6px; font-family: "Playfair Display", "Georgia", serif; }
.hero-text .subtitle { margin: 4px 0 0; color: var(--muted); }
.eyebrow { margin: 0; color: #0d5d9a; font-weight: 700; letter-spacing: 0.5px; font-size: 12px; text-transform: uppercase; }

.hero-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.badge {
  background: #0d5d9a;
  font-weight: 700;
  letter-spacing: -0.1px;
  font-size: 13px;
  border-radius: 999px;
  box-shadow: 0 8px 16px rgba(13, 93, 154, 0.25);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding: 12px 0 8px;
}
.title-group h1 {
  margin: 0;
  font-size: 30px;
  letter-spacing: -0.5px;
  font-family: "Playfair Display", "Georgia", serif;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.revert-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  box-shadow: var(--shadow);
}

.revert-text { color: var(--text); font-weight: 700; font-size: 14px; }
.revert-controls { display: flex; gap: 8px; align-items: center; }
.revert-controls select {
  min-width: 200px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #f8fafc;
  color: var(--text);
}

.revert-controls button { padding: 8px 12px; }

.cache-prompt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
}

.cache-text { display: flex; flex-direction: column; gap: 2px; color: var(--text); font-size: 14px; }
.cache-text strong { font-size: 15px; }
.cache-text span { color: var(--muted); font-size: 13px; }

.cache-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.cache-actions .small { padding: 8px 10px; font-size: 13px; }

.action-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

button {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px 12px;
  background: linear-gradient(145deg, #ffffff, #f4f6fa);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
  letter-spacing: -0.05px;
  font-size: 13px;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease, border-color 120ms ease;
}

button:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
button:active { transform: translateY(0); }

button.primary {
  background: linear-gradient(145deg, #0f6cb1, #0b5c95);
  color: #f7fafc;
  border-color: #0f6cb1;
}

button.danger {
  background: linear-gradient(145deg, #e85942, #c93c2e);
  color: #fff7f4;
  border-color: #e85942;
}

button.ghost { background: transparent; }

.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  padding: 6px 0;
}

.chip {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

.chip.score { color: var(--text); font-weight: 700; }

.palette {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  padding: 8px 0;
}

.palette button {
  width: 46px;
  height: 46px;
  border-radius: 10px;
  border: 3px solid #ffffff;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  padding: 0;
  filter: none;
  opacity: 1;
}

.palette button.active {
  border-color: #0f6cb1;
  box-shadow: 0 0 0 7px rgba(13, 93, 154, 0.7), 0 16px 36px rgba(0, 0, 0, 0.35);
  outline: 5px solid rgba(13, 93, 154, 1);
  outline-offset: 5px;
  filter: brightness(1.25) saturate(1.35);
  opacity: 1;
  transform: scale(1.08);
}

.board {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 22px;
  row-gap: 28px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 22px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}

.panel-header h2, .panel-header h3 { margin: 0; }

.hint { margin: 0; color: var(--muted); font-size: 12px; letter-spacing: -0.1px; }

.pattern-lines { display: flex; flex-direction: column; gap: 12px; }
.pattern-row {
  display: grid;
  grid-auto-columns: 1fr;
  gap: 6px;
  align-items: center;
  grid-template-columns: 60px repeat(5, 1fr);
}

.row-label { color: var(--muted); font-size: 13px; text-align: right; padding-right: 8px; font-weight: 700; }

.slots { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(40px, 1fr)); }

.slot {
  height: 44px;
  border-radius: 10px;
  border: 1px dashed #cbd3df;
  background: var(--tile-empty);
  position: relative;
  cursor: pointer;
  transition: border-color 120ms ease, transform 120ms ease, background 120ms ease;
}

.slot:hover { border-color: var(--accent); transform: translateY(-1px); }
.slot.filled { border-style: solid; }
.slot.filled .penalty-number { color: #ffffff; }

.penalty-number {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #8a1c12;
  font-weight: 700;
  font-size: 12px;
  pointer-events: none;
}

.floor-line { display: grid; grid-template-columns: repeat(7, 1fr); gap: 12px; padding-top: 6px; }

.wall-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--grid-gap);
  padding: 10px;
  background: linear-gradient(180deg, #f7f9fc, #eef2f8);
  border-radius: 14px;
  border: 1px solid var(--border);
}

.wall-cell {
  position: relative;
  padding-top: 100%;
  border-radius: 10px;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid #dfe4eb;
  cursor: pointer;
}

.wall-cell .inner {
  position: absolute;
  inset: 6px;
  border-radius: 8px;
  background: rgba(13, 93, 154, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 12px;
}

.wall-cell.standard:not(.filled) {
  filter: brightness(0.88) saturate(0.65);
}

.wall-cell.standard .inner { opacity: 0.8; font-weight: 700; color: #0d5d9a; }
.wall-cell.filled { border-color: rgba(13, 93, 154, 0.35); }
.wall-cell.pending { box-shadow: 0 0 0 3px rgba(13, 93, 154, 0.25); }
.wall-cell.standard.pending {
  filter: brightness(1.15);
  border-color: rgba(13, 93, 154, 0.45);
}
.wall-cell.recent {
  filter: brightness(1.12);
  border-color: rgba(13, 93, 154, 0.45);
}

.log {
  background: #ffffff;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 12px;
}

.log-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

.message {
  padding: 16px 18px;
  background: rgba(13, 93, 154, 0.08);
  border: 1px solid rgba(13, 93, 154, 0.3);
  border-radius: 12px;
  color: #0d5d9a;
  min-height: 28px;
}

.tile { width: 100%; height: 100%; border-radius: 8px; }
.tile.blue { background: var(--tile-blue); background-image: url("images/blue.png"); background-size: cover; }
.tile.yellow { background: var(--tile-yellow); background-image: url("images/yellow.png"); background-size: cover; }
.tile.red { background: var(--tile-red); background-image: url("images/red.png"); background-size: cover; }
.tile.black { background: var(--tile-black); background-image: url("images/black.png"); background-size: cover; }
.tile.teal { background: var(--tile-teal); background-image: url("images/white.png"); background-size: cover; }
.tile.empty { background: transparent; }

/* Standard board decorative backgrounds */
.tile-bg-blue { background: var(--tile-blue) url("images/blue.png") center/cover; }
.tile-bg-yellow { background: var(--tile-yellow) url("images/yellow.png") center/cover; }
.tile-bg-red { background: var(--tile-red) url("images/red.png") center/cover; }
.tile-bg-black { background: var(--tile-black) url("images/black.png") center/cover; }
.tile-bg-teal { background: var(--tile-teal) url("images/white.png") center/cover; }
.tile-bg-empty { background: #e0e4ea; }

@media (max-width: 980px) {
  .board { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .pattern-row { grid-template-columns: 50px repeat(5, 1fr); }
}

.site-footer {
  margin-top: 12px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  padding: 12px 0 4px;
}

@media (max-width: 820px) {
  :root { font-size: 14px; }
  .app-shell { padding: 14px 14px 28px; gap: 22px; }
  .hero { flex-direction: column; gap: 10px; padding: 18px 18px; }
  .hero-text h1 { font-size: 26px; }
  .topbar { justify-content: flex-start; }
  .cache-prompt { flex-direction: column; align-items: flex-start; }
  .cache-actions { width: 100%; }
  .cache-actions button { flex: 1 1 140px; }
  .revert-bar { flex-direction: column; align-items: flex-start; }
  .revert-controls { width: 100%; }
  .revert-controls select { flex: 1 1 auto; }
  .action-group { width: 100%; gap: 10px; }
  .action-group button { flex: 1 1 120px; }
  .summary { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
  .panel { padding: 18px 16px; gap: 14px; }
  .board { row-gap: 18px; column-gap: 16px; }
  .floor-line { grid-template-columns: repeat(auto-fit, minmax(52px, 1fr)); gap: 10px; }
  .wall-grid { padding: 8px; gap: 8px; }
}

@media (max-width: 560px) {
  .hero-text h1 { font-size: 22px; }
  .chip { padding: 8px 10px; }
  button { width: 100%; min-width: 0; }
  .action-group {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    width: 100%;
  }
  .action-group button { height: 100%; }
  .revert-controls { width: 100%; gap: 6px; }
  .revert-controls select { width: 100%; }
  .cache-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); display: grid; }
  .wall-grid { gap: 6px; padding: 6px; }
  .panel { padding: 16px 14px; }
  .floor-line { gap: 8px; }
}