@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;700&family=Mukta:wght@400;500;600&display=swap');

:root {
  --bg: #161225;
  --bg-deep: #0f0c1c;
  --parchment: #EDE3C8;
  --parchment-dim: #d9cca3;
  --teal: #1F7A6C;
  --gold: #C9A24B;
  --sindoor: #A8322D;
  --ink: #241c33;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% -10%, rgba(201,162,75,0.15), transparent 50%),
    radial-gradient(circle at 20% 30%, rgba(201,162,75,0.06), transparent 40%),
    radial-gradient(circle at 80% 90%, rgba(31,122,108,0.10), transparent 45%),
    var(--bg);
  color: var(--parchment);
  font-family: 'Mukta', sans-serif;
}

h1, h2, h3, .display {
  font-family: 'Cinzel', serif;
  letter-spacing: 0.03em;
}

a { color: inherit; }

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

/* ---------- Sannivesham Hero Branding ---------- */

.sannivesham-hero {
  text-align: center;
  padding: 24px 0 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-logo-wrapper {
  position: relative;
  margin-bottom: 16px;
}

.hero-emblem {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: linear-gradient(160deg, var(--ink), var(--bg-deep));
  border: 3px solid var(--gold);
  box-shadow: 0 0 25px rgba(201,162,75,0.4), inset 0 0 15px rgba(201,162,75,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden; /* Keeps the logo image cleanly bound to the circle */
  transition: transform 0.3s ease;
}

.hero-emblem:hover {
  transform: scale(1.02);
}

.emblem-img {
  width: 100%;
  height: 100%;
  object-fit: cover; /* Centers and uniformly fills the container */
  display: block;
}

.main-brand-title {
  font-family: 'Mukta', sans-serif;
  font-size: clamp(2.5rem, 6vw, 3.8rem);
  font-weight: 600;
  color: var(--gold);
  margin: 0;
  line-height: 1.2;
  text-shadow: 0 4px 12px rgba(0,0,0,0.6), 0 0 20px rgba(201,162,75,0.2);
}

.main-brand-tagline {
  margin: 6px 0 0;
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  letter-spacing: 0.05em;
  color: var(--parchment-dim);
  opacity: 0.9;
  text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

/* ---------- Section Header Separator ---------- */

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px 16px;
  margin-top: 20px;
  margin-bottom: 36px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(201,162,75,0.25);
}

.site-header-titles {
  min-width: 200px;
  flex: 1 1 auto;
}

.site-header h2 {
  font-size: clamp(1.3rem, 3.5vw, 1.8rem);
  color: var(--gold);
  margin: 0;
}

.site-header .subtitle {
  margin: 4px 0 0;
  font-size: 0.9rem;
  color: var(--parchment-dim);
}

.back-link {
  text-decoration: none;
  color: var(--teal);
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.back-link:hover {
  color: var(--gold);
}

/* ---------- Level select ---------- */

.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 22px;
}

.level-card {
  position: relative;
  background: linear-gradient(160deg, var(--ink), var(--bg-deep));
  border: 1px solid rgba(201,162,75,0.3);
  border-radius: var(--radius);
  padding: 22px 20px;
  text-decoration: none;
  color: var(--parchment);
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  overflow: hidden;
}

.level-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 90% -10%, rgba(201,162,75,0.15), transparent 55%);
  pointer-events: none;
}

.level-card:hover:not(.locked) {
  transform: translateY(-3px);
  border-color: var(--gold);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.level-card.locked {
  opacity: 0.45;
  pointer-events: none;
}

.level-number {
  font-family: 'Cinzel', serif;
  color: var(--gold);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.level-title {
  font-family: 'Cinzel', serif;
  font-size: 1.25rem;
  margin: 6px 0 10px;
}

.level-meta {
  display: flex;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--parchment-dim);
}

.level-stars {
  margin-top: 14px;
  color: var(--gold);
  letter-spacing: 2px;
}

.level-lock-icon {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 1.2rem;
  color: var(--sindoor);
}

/* ---------- Game screen ---------- */

.game-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
}

.game-stats {
  display: flex;
  gap: 18px;
  font-size: 0.95rem;
  color: var(--parchment-dim);
}

.game-stats span strong {
  color: var(--gold);
}

.board-frame {
  background: linear-gradient(160deg, var(--ink), var(--bg-deep));
  border: 2px solid var(--gold);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: 0 0 0 6px rgba(201,162,75,0.08), 0 20px 40px rgba(0,0,0,0.4);
  max-width: 560px;
  margin: 0 auto;
}

.sudoku-grid {
  display: grid;
  gap: 2px;
  background: rgba(201,162,75,0.35);
  border: 3px solid var(--gold);
  border-radius: 6px;
  overflow: hidden;
  aspect-ratio: 1 / 1;
}

.cell {
  background: var(--parchment);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: background 0.12s ease;
}

.cell:hover { background: #fff8e6; }

.cell.given { cursor: default; background: #e4d7ae; }
.cell.given:hover { background: #e4d7ae; }

.cell.selected { background: #cdeee6; }
.cell.conflict { background: #f3c9c4; }
.cell.same-value { background: #ddf0ea; }

.cell .symbol-icon {
  width: 62%;
  height: 62%;
  color: var(--ink);
}

.cell.given .symbol-icon { color: #4a3a1f; }
.cell.conflict .symbol-icon { color: var(--sindoor); }

.cell.box-edge-right { border-right: 2px solid var(--ink); }
.cell.box-edge-bottom { border-bottom: 2px solid var(--ink); }

.symbol-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 26px;
}

.palette-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  background: var(--ink);
  color: var(--parchment);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.12s ease;
}

.palette-btn:hover { transform: scale(1.08); background: var(--teal); }
.palette-btn.erase { color: var(--sindoor); font-family: 'Cinzel', serif; font-size: 0.8rem; }

.palette-btn .symbol-icon {
  width: 78%;
  height: 78%;
}

.controls-row {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 20px;
}

.btn {
  font-family: 'Mukta', sans-serif;
  font-weight: 600;
  border: none;
  border-radius: 999px;
  padding: 10px 22px;
  cursor: pointer;
  font-size: 0.9rem;
}

.btn-primary { background: var(--teal); color: #fff; }
.btn-secondary { background: transparent; color: var(--parchment); border: 1px solid rgba(237,227,200,0.4); }

/* ---------- Win overlay ---------- */

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,12,28,0.86);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
}

.overlay.hidden { display: none; }

.overlay-card {
  background: linear-gradient(160deg, var(--ink), var(--bg-deep));
  border: 2px solid var(--gold);
  border-radius: var(--radius);
  padding: 40px 36px;
  text-align: center;
  max-width: 380px;
}

.overlay-card h2 {
  color: var(--gold);
  margin-top: 0;
}

.overlay-stars {
  font-size: 2rem;
  color: var(--gold);
  margin: 14px 0;
  letter-spacing: 6px;
}

@media (max-width: 480px) {
  .palette-btn { width: 46px; height: 46px; }
  .board-frame { padding: 8px; }
  .sannivesham-hero { padding: 12px 0 20px; }
  .hero-emblem { width: 110px; height: 110px; } /* Clean layout adjustments for mobile */
}