:root {
  font-family: Inter, system-ui, sans-serif;
  color: #222;
  background: #f4f1ea;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  padding: 1.5rem;
  display: flex;
  justify-content: center;
  background: #f4f1ea;
}

button {
  font: inherit;
  cursor: pointer;
}


.app {
  width: min(100%, 900px);
  padding: 1.4rem;
  border-radius: 12px;
  background: #fff;
  border: 1px solid #ddd;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

header {
  text-align: center;
  margin-bottom: 1.6rem;
}

header h1 {
  margin-bottom: 0.3rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #111;
}

header p {
  margin: 0.3rem auto;
  max-width: 620px;
  color: #555;
}

.tagline {
  font-weight: 500;
}

.stats-panel,
.controls,
.music-info,
.map-section,
.history-panel {
  background: #fff;
  border: 1px solid #e2e2e2;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
}

.stats-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  padding: 1rem;
}

.stat-card {
  padding: 0.8rem;
}

.stat-label {
  font-size: 0.75rem;
  color: #666;
  margin-bottom: 0.4rem;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1a4ed8;
}


.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.9rem;
  padding: 1rem;
  margin-top: 1.4rem;
}

.btn {
  min-height: 48px;
  border-radius: 8px;
  font-weight: 600;
  border: 1px solid transparent;
  background: #eee;
  transition: background 0.15s ease, transform 0.1s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: #1f6feb;
  color: #fff;
}

.btn-danger {
  background: #d64545;
  color: #fff;
}

.btn-secondary {
  background: #f2f2f2;
  border-color: #ccc;
  color: #222;
}

.music-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  padding: 1rem;
  margin-top: 1.4rem;
}

.info-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.info-label {
  color: #666;
}

.info-value {
  font-weight: 700;
  color: #111;
}

.song-section {
  padding: 1rem;
  margin-top: 1.4rem;
}

.song-section h2 {
  margin-bottom: 0.65rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.song-copy {
  margin: 0;
  color: #555;
  line-height: 1.6;
}

.history-panel {
  padding: 1rem;
  margin-top: 1.4rem;
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.8rem;
}

.history-header h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.close-btn {
  font-size: 1.4rem;
  color: #444;
  background: none;
  border: none;
}

.walks-list {
  display: grid;
  gap: 0.8rem;
  max-height: 320px;
  overflow-y: auto;
}

.walk-item {
  padding: 0.8rem;
  border-radius: 8px;
  background: #f7f7f7;
  border: 1px solid #ddd;
}

.walk-item h4 {
  margin: 0 0 0.3rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.walk-item p {
  margin: 0.2rem 0;
  color: #555;
}

.replay-btn {
  margin-top: 0.6rem;
  background: #0f766e;
  color: white;
  border-radius: 6px;
}

footer {
  text-align: center;
  margin-top: 2rem;
  color: #666;
  font-size: 0.85rem;
}

.footer-note {
  margin-top: 0.2rem;
}

@media (max-width: 720px) {
  body {
    padding: 0.75rem;
  }

  .app {
    padding: 1rem;
    border-radius: 10px;
  }

  .stats-panel,
  .controls,
  .music-info {
    grid-template-columns: 1fr;
  }

  .info-row {
    flex-direction: column;
    align-items: flex-start;
  }

  #mapCanvas {
    min-height: 240px;
  }
}