:root {
  color-scheme: light;
  --bg-1: #f7efe4;
  --bg-2: #efe0d0;
  --panel: rgba(255, 250, 242, 0.82);
  --panel-strong: #fffaf2;
  --ink: #2b2320;
  --muted: #6f6058;
  --line: rgba(78, 58, 46, 0.14);
  --shadow: 0 18px 40px rgba(54, 35, 25, 0.14);
  --mystery: #7d5cf3;
  --scifi: #0f9fa5;
  --romance: #d95f7f;
  --cart: #7e6757;
  --good: #237a53;
  --warn: #bb6a17;
  --select: #ffb547;
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.8), transparent 35%),
    radial-gradient(circle at 90% 10%, rgba(255, 225, 190, 0.6), transparent 24%),
    linear-gradient(160deg, var(--bg-1), var(--bg-2));
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.app-shell {
  position: relative;
  min-height: 100vh;
  padding: 18px;
}

.app-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(120deg, rgba(114, 79, 49, 0.06) 0 1px, transparent 1px 100%),
    linear-gradient(0deg, rgba(114, 79, 49, 0.04) 0 1px, transparent 1px 100%);
  background-size: 140px 140px, 100% 100%;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), transparent 92%);
}

.top-nav,
.game-shell {
  width: min(1100px, calc(100vw - 36px));
  margin: 0 auto;
}

.top-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.top-nav a {
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(92, 66, 49, 0.16);
  box-shadow: 0 8px 20px rgba(46, 29, 18, 0.08);
}

.game-shell {
  display: grid;
  gap: 18px;
  padding: 18px;
  border: 1px solid rgba(92, 66, 49, 0.16);
  border-radius: 28px;
  background: var(--panel);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr auto;
  align-items: end;
}

.eyebrow {
  margin: 0 0 8px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.76rem;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 0.95;
}

.lede {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--muted);
}

.hero-note {
  justify-self: end;
  align-self: stretch;
  display: grid;
  align-items: center;
  max-width: 280px;
  padding: 14px 16px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(247, 236, 221, 0.95));
  border: 1px solid rgba(92, 66, 49, 0.14);
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.hud {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.stat-card,
.controls,
.zone,
.bookmark-card {
  border-radius: var(--radius);
  border: 1px solid rgba(92, 66, 49, 0.14);
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 10px 24px rgba(58, 38, 26, 0.08);
}

.stat-card {
  padding: 14px 16px;
  display: grid;
  gap: 3px;
}

.stat-label {
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.stat-card strong {
  font-size: 1.1rem;
}

.bookmark-card {
  padding: 12px 12px 10px;
}

.bookmark-button {
  width: 100%;
  display: grid;
  gap: 5px;
  text-align: left;
  border: 0;
  border-radius: 18px;
  padding: 12px 13px;
  background: linear-gradient(135deg, rgba(255, 232, 198, 0.95), rgba(255, 255, 255, 0.9));
  color: var(--ink);
  box-shadow: inset 0 0 0 1px rgba(92, 66, 49, 0.14);
  cursor: pointer;
}

.bookmark-button .bookmark-title {
  font-weight: 800;
}

.bookmark-button .bookmark-subtitle {
  color: var(--muted);
  font-size: 0.86rem;
}

.instructions {
  margin: 0;
  padding: 14px 16px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.58);
  border: 1px dashed rgba(92, 66, 49, 0.18);
  color: var(--muted);
  line-height: 1.5;
}

.board {
  display: grid;
  gap: 14px;
}

.shelf-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.zone {
  padding: 12px;
}

.zone-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.zone-title {
  display: grid;
  gap: 4px;
}

.zone-title strong {
  font-size: 1.02rem;
}

.zone-title span {
  font-size: 0.84rem;
  color: var(--muted);
}

.zone-count {
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
}

.slot-list {
  display: grid;
  gap: 10px;
}

.slot {
  position: relative;
  min-height: 110px;
  border: 0;
  border-radius: 18px;
  padding: 12px;
  text-align: left;
  cursor: pointer;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.25)),
    repeating-linear-gradient(
      to bottom,
      rgba(101, 72, 53, 0.08),
      rgba(101, 72, 53, 0.08) 2px,
      rgba(255, 255, 255, 0.08) 2px,
      rgba(255, 255, 255, 0.08) 8px
    );
  box-shadow:
    inset 0 0 0 1px rgba(92, 66, 49, 0.16),
    0 8px 14px rgba(54, 35, 25, 0.08);
  transition: transform 160ms ease, box-shadow 160ms ease, outline-color 160ms ease;
}

.slot:hover {
  transform: translateY(-1px);
}

.slot:focus-visible,
.bookmark-button:focus-visible,
.secondary-button:focus-visible,
.primary-button:focus-visible {
  outline: 3px solid rgba(255, 181, 71, 0.9);
  outline-offset: 3px;
}

.slot.selected {
  box-shadow:
    inset 0 0 0 2px rgba(255, 181, 71, 0.95),
    0 0 0 4px rgba(255, 181, 71, 0.18),
    0 12px 24px rgba(54, 35, 25, 0.1);
}

.slot.target-match {
  box-shadow:
    inset 0 0 0 2px rgba(35, 122, 83, 0.92),
    0 12px 24px rgba(54, 35, 25, 0.1);
}

.slot.empty {
  border: 2px dashed rgba(92, 66, 49, 0.22);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.52), rgba(255, 255, 255, 0.28)),
    linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.02));
}

.empty-label {
  display: grid;
  place-content: center;
  min-height: 86px;
  text-align: center;
  color: var(--muted);
}

.empty-label strong {
  font-size: 0.98rem;
}

.empty-label span {
  margin-top: 4px;
  font-size: 0.82rem;
}

.book {
  display: grid;
  gap: 8px;
}

.spine {
  width: 100%;
  height: 16px;
  border-radius: 999px;
  background: var(--genre);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.book-title {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
  line-height: 1.15;
  font-weight: 700;
}

.book-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.genre-pill {
  padding: 5px 8px;
  border-radius: 999px;
  color: white;
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.zone.mystery {
  --zone: rgba(125, 92, 243, 0.14);
  background: linear-gradient(180deg, rgba(125, 92, 243, 0.1), rgba(255, 255, 255, 0.68));
}

.zone.scifi {
  --zone: rgba(15, 159, 165, 0.14);
  background: linear-gradient(180deg, rgba(15, 159, 165, 0.1), rgba(255, 255, 255, 0.68));
}

.zone.romance {
  --zone: rgba(217, 95, 127, 0.14);
  background: linear-gradient(180deg, rgba(217, 95, 127, 0.1), rgba(255, 255, 255, 0.68));
}

.zone.cart {
  --zone: rgba(126, 103, 87, 0.14);
  background: linear-gradient(180deg, rgba(126, 103, 87, 0.1), rgba(255, 255, 255, 0.68));
}

.zone.mystery .genre-pill,
.zone.mystery .spine {
  background: var(--mystery);
}

.zone.scifi .genre-pill,
.zone.scifi .spine {
  background: var(--scifi);
}

.zone.romance .genre-pill,
.zone.romance .spine {
  background: var(--romance);
}

.zone.cart .genre-pill,
.zone.cart .spine {
  background: var(--cart);
}

.controls {
  padding: 14px;
  display: grid;
  gap: 12px;
}

.status {
  min-height: 2.4em;
  color: var(--muted);
  line-height: 1.5;
}

.controls-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.secondary-button,
.primary-button {
  border: 0;
  border-radius: 999px;
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.secondary-button {
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px rgba(92, 66, 49, 0.14);
}

.primary-button {
  background: linear-gradient(135deg, #2d6b4c, #4c8b63);
  color: #fff9f2;
  box-shadow: 0 10px 20px rgba(45, 107, 76, 0.24);
}

.clear-banner {
  padding: 14px 16px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(35, 122, 83, 0.14), rgba(255, 255, 255, 0.82));
  color: var(--good);
  font-weight: 700;
}

.fail-banner {
  padding: 14px 16px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(187, 106, 23, 0.16), rgba(255, 255, 255, 0.8));
  color: var(--warn);
  font-weight: 700;
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-note {
    justify-self: stretch;
    max-width: none;
  }

  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .shelf-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .app-shell {
    padding: 12px;
  }

  .top-nav,
  .game-shell {
    width: min(100vw - 24px, 1100px);
  }

  .game-shell {
    padding: 14px;
    border-radius: 24px;
  }

  .hud {
    grid-template-columns: 1fr 1fr;
  }

  .slot {
    min-height: 98px;
  }

  .controls-row {
    justify-content: stretch;
  }

  .secondary-button,
  .primary-button {
    flex: 1 1 160px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}