:root {
  --bg: #0d1117;
  --card: #161b22;
  --card2: #1c2330;
  --border: #30363d;
  --accent: #1e90ff;
  --gold: #ffd700;
  --silver: #c0c0c0;
  --bronze: #cd7f32;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --green: #3fb950;
  --yellow: #d29922;
  --red: #f85149;
  --tab-height: 64px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
}

/* ── Layout ─────────────────────────────── */
#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 430px;
  margin: 0 auto;
}

.page {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding: 12px 12px calc(var(--tab-height) + 8px);
}
.page.active { display: block; }

/* ── Tab Bar ─────────────────────────────── */
#tab-bar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: var(--tab-height);
  background: var(--card);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: stretch;
  z-index: 100;
}

.tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 10px;
  transition: color .2s;
  padding: 6px 0;
  border: none;
  background: none;
}
.tab .icon { font-size: 20px; }
.tab.active { color: var(--accent); }

/* ── Cards ─────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 8px;
}

/* ── Period switcher ──────────────────── */
.period-switcher {
  display: flex;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 3px;
  margin-bottom: 12px;
  gap: 3px;
}
.period-btn {
  flex: 1;
  padding: 7px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  transition: all .2s;
}
.period-btn.active {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

/* ── Leaderboard ─────────────────────── */
.lb-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 6px;
  transition: border-color .2s;
}
.lb-item.me { border-color: var(--accent); background: rgba(30,144,255,.07); }
.lb-item.gold { border-color: var(--gold); }
.lb-item.silver { border-color: var(--silver); }
.lb-item.bronze { border-color: var(--bronze); }

.lb-rank {
  font-size: 16px;
  font-weight: 700;
  min-width: 28px;
  text-align: center;
}
.lb-rank.gold { color: var(--gold); }
.lb-rank.silver { color: var(--silver); }
.lb-rank.bronze { color: var(--bronze); }

.avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
  flex-shrink: 0;
  background: var(--accent);
  color: #fff;
}
.avatar.gold { background: var(--gold); color: #000; }
.avatar.silver { background: var(--silver); color: #000; }
.avatar.bronze { background: var(--bronze); color: #fff; }

.lb-info { flex: 1; min-width: 0; }
.lb-name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lb-title { font-size: 11px; color: var(--text-muted); }

.lb-stats { text-align: right; flex-shrink: 0; }
.lb-points { font-size: 18px; font-weight: 700; color: var(--accent); }
.lb-reports { font-size: 11px; color: var(--text-muted); }

/* ── Spots ───────────────────────────── */
.spot-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 8px;
}
.spot-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 8px; }
.spot-name { font-size: 16px; font-weight: 700; }
.spot-type { font-size: 11px; color: var(--text-muted); background: var(--card2); padding: 2px 8px; border-radius: 20px; border: 1px solid var(--border); }

.spot-stats { display: flex; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.stat-item { display: flex; flex-direction: column; align-items: center; }
.stat-val { font-size: 20px; font-weight: 700; }
.stat-label { font-size: 10px; color: var(--text-muted); }

.spot-last { font-size: 12px; color: var(--text-muted); margin-bottom: 10px; }
.spot-btn {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--accent); color: #fff;
  border: none; border-radius: 8px; padding: 7px 14px;
  font-size: 13px; cursor: pointer; text-decoration: none;
}

/* ── Feed ────────────────────────────── */
.report-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 8px;
}
.report-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.report-user { font-weight: 600; }
.report-date { font-size: 11px; color: var(--text-muted); }

.report-spot-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.report-spot { font-size: 13px; }
.score-badge {
  font-size: 13px; font-weight: 700;
  padding: 2px 8px; border-radius: 20px;
}
.score-badge.green { background: rgba(63,185,80,.15); color: var(--green); border: 1px solid rgba(63,185,80,.3); }
.score-badge.yellow { background: rgba(210,153,34,.15); color: var(--yellow); border: 1px solid rgba(210,153,34,.3); }
.score-badge.red { background: rgba(248,81,73,.15); color: var(--red); border: 1px solid rgba(248,81,73,.3); }

.report-conditions { font-size: 13px; color: var(--text-muted); }
.title-badge {
  display: inline-block; font-size: 10px;
  padding: 1px 7px; border-radius: 20px;
  background: rgba(30,144,255,.15); color: var(--accent);
  border: 1px solid rgba(30,144,255,.3);
  margin-top: 6px;
}

/* ── Profile ────────────────────────── */
.profile-avatar {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--accent); display: flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: 700; margin: 0 auto 12px;
}
.profile-name { font-size: 20px; font-weight: 700; text-align: center; }
.profile-title { text-align: center; color: var(--text-muted); margin-bottom: 16px; }

.progress-bar {
  background: var(--card2); border-radius: 8px; height: 8px; overflow: hidden; margin: 8px 0;
}
.progress-fill {
  height: 100%; background: var(--accent); border-radius: 8px; transition: width .5s;
}
.progress-label { display: flex; justify-content: space-between; font-size: 11px; color: var(--text-muted); }

.achievements { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.achievement {
  background: var(--card2); border: 1px solid var(--border);
  border-radius: 10px; padding: 8px 12px;
  font-size: 12px; display: flex; align-items: center; gap: 6px;
}

/* ── Section Header ──────────────────── */
.section-header {
  font-size: 13px; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .5px;
  margin: 16px 0 8px;
}

/* ── Loading / Empty ─────────────────── */
.loading { text-align: center; padding: 40px; color: var(--text-muted); }
.empty { text-align: center; padding: 40px; color: var(--text-muted); font-size: 13px; }

/* Scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }