@import url("https://gstatic.aby.pub/css2?family=ZCOOL+XiaoWei&family=Noto+Serif+SC:wght@400;600&display=swap");

:root {
  color-scheme: light;
  --bg: #f6f1e7;
  --ink: #1b1712;
  --muted: #6d6257;
  --accent: #d96c2c;
  --accent-deep: #ad4a12;
  --paper: #fff8f0;
  --shadow: 0 10px 30px rgba(60, 45, 30, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Serif SC", "ZCOOL XiaoWei", "Source Han Serif SC", serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #fff4e1 0%, #f2e3cf 45%, #ecd7be 100%);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  background: rgba(246, 241, 231, 0.85);
  border-bottom: 1px solid rgba(60, 45, 30, 0.12);
  z-index: 10;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  max-width: 1200px;
  margin: 0 auto;
}

.brand {
  font-size: 22px;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 16px;
  font-size: 14px;
  color: var(--muted);
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 30px 24px 60px;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 1.4fr;
  gap: 24px;
  align-items: start;
  animation: reveal 0.7s ease;
}

.card {
  background: var(--paper);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(60, 45, 30, 0.1);
}

.card h2 {
  margin: 0 0 16px;
  font-size: 20px;
}

.card p {
  color: var(--muted);
  margin: 6px 0 0;
}

#challengeImage {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(60, 45, 30, 0.12);
  box-shadow: 0 6px 18px rgba(60, 45, 30, 0.12);
}

.map-wrap {
  position: relative;
  width: min(100%, 70vh);
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(60, 45, 30, 0.2);
  background: #e7dccf;
  touch-action: none;
}

.map-inner {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform-origin: 0 0;
  touch-action: none;
  --marker-scale: 1;
}

.map-inner img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.line-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.zoom-controls {
  position: absolute;
  right: 12px;
  top: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 6px;
  border-radius: 12px;
  background: rgba(246, 241, 231, 0.9);
  border: 1px solid rgba(60, 45, 30, 0.15);
  box-shadow: 0 8px 18px rgba(60, 45, 30, 0.15);
}

.zoom-controls button {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 10px;
  font-size: 16px;
  line-height: 1;
}

.marker {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(217, 108, 44, 0.95);
  border: 3px solid #fff;
  box-shadow: 0 4px 10px rgba(60, 45, 30, 0.3);
  transform: translate(-50%, -50%) scale(var(--marker-scale, 1));
  animation: drop 0.35s ease;
}

.marker.answer {
  background: rgba(35, 115, 92, 0.95);
}

.hidden {
  display: none;
}

.actions {
  margin-top: 16px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

button {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 10px 22px;
  font-size: 14px;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(217, 108, 44, 0.35);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.info-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(60, 45, 30, 0.08);
  color: var(--muted);
  font-size: 12px;
}

.form {
  display: grid;
  gap: 12px;
}

input, select {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(60, 45, 30, 0.25);
  font-size: 14px;
  font-family: inherit;
}

.notice {
  color: var(--muted);
  font-size: 13px;
}

.panel {
  max-width: 520px;
  margin: 40px auto 0;
}

.tag {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--accent-deep);
  text-transform: uppercase;
}

.result-panel {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(217, 108, 44, 0.35);
  background: rgba(217, 108, 44, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
}

.result-panel strong {
  font-size: 18px;
  color: var(--accent-deep);
}

.bank-list {
  display: grid;
  gap: 14px;
}

.bank-item {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(60, 45, 30, 0.12);
  background: rgba(255, 255, 255, 0.75);
}

.bank-item img {
  width: 120px;
  height: 90px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid rgba(60, 45, 30, 0.15);
}

.bank-meta {
  font-size: 13px;
  color: var(--muted);
}

.bank-meta strong {
  color: var(--ink);
}

.bank-item .actions {
  margin-top: 0;
  justify-content: flex-start;
}

.leaderboard {
  display: grid;
  gap: 10px;
}

.leaderboard-item {
  display: grid;
  grid-template-columns: 50px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(60, 45, 30, 0.1);
  background: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.leaderboard-rank {
  font-size: 18px;
  font-weight: 600;
  color: var(--accent-deep);
}

.leaderboard-score {
  font-weight: 600;
}

.user-list {
  display: grid;
  gap: 12px;
}

.user-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(60, 45, 30, 0.12);
  background: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.user-meta {
  color: var(--muted);
  font-size: 13px;
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drop {
  from {
    transform: translate(-50%, -70%) scale(calc(var(--marker-scale, 1) * 0.85));
    opacity: 0;
  }
  to {
    transform: translate(-50%, -50%) scale(var(--marker-scale, 1));
    opacity: 1;
  }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .map-wrap {
    width: 100%;
  }

  .bank-item {
    grid-template-columns: 1fr;
  }

  .bank-item img {
    width: 100%;
    height: 160px;
  }

  .leaderboard-item {
    grid-template-columns: 1fr;
  }

  .user-item {
    grid-template-columns: 1fr;
  }
}