* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #0b0d10; --card: #14171c; --card2: #1a1e24;
  --text: #f2f3f5; --muted: #8a909a; --accent: #f5793b;
  --border: #23272e;
}
body {
  background: var(--bg); color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
  padding-bottom: 80px;
}
.header { display: flex; align-items: center; gap: 12px; padding: 18px 16px 8px; }
.header img.avatar { width: 42px; height: 42px; border-radius: 50%; }
.header .name { font-weight: 700; font-size: 18px; }
.header .handle { color: var(--muted); font-size: 12px; }
.header .wallet { margin-left: auto; text-align: right; }
.header .wallet small { color: var(--muted); font-size: 10px; letter-spacing: 1px; }
.header .wallet .amount { font-weight: 700; }
.section-title { font-size: 26px; font-weight: 800; padding: 12px 16px 4px; }
.tabs { display: flex; gap: 10px; padding: 8px 16px 16px; flex-wrap: wrap; }
.tab { padding: 8px 20px; border-radius: 20px; background: var(--card2);
  color: var(--muted); font-size: 14px; cursor: pointer; border: 1px solid var(--border); }
.tab.active { color: var(--text); border-color: #3a4048; }
.grid { padding: 0 16px; display: grid; grid-template-columns: 1fr; gap: 16px; }
@media(min-width:520px){ .grid { grid-template-columns: 1fr 1fr; } }
.card { background: var(--card); border-radius: 16px; overflow: hidden; border: 1px solid var(--border); }
.card .banner { height: 130px; background: var(--accent); position: relative;
  display: flex; align-items: center; justify-content: center;
  background-size: cover; background-position: center; }
.card .banner .big { font-size: 34px; font-weight: 900; color: #fff; opacity: .95; }
.card .body { padding: 12px 14px; }
.card .title { font-weight: 700; font-size: 15px; }
.card .row { display: flex; justify-content: space-between; align-items: center; margin-top: 6px; }
.card .price { font-weight: 700; }
.card .stock { color: var(--muted); font-size: 12px; }
.card.out { opacity: .5; }
.navbar { position: fixed; bottom: 0; left: 0; right: 0; height: 64px;
  background: #0d1013; border-top: 1px solid var(--border);
  display: flex; justify-content: space-around; align-items: center; }
.navbar .item { text-align: center; color: var(--muted); font-size: 10px; cursor: pointer; }
.navbar .item.active { color: var(--text); }
.navbar .item .ic { font-size: 18px; display: block; }
.wallet-grid { padding: 0 16px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.wallet-cell { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px; cursor: pointer; }
.wallet-cell .cur { font-weight: 700; }
.wallet-cell .net { color: var(--muted); font-size: 12px; }
.hidden { display: none; }
.sheet-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.6); display:flex; align-items:flex-end; z-index:50; }
.sheet { background: var(--card); width: 100%; border-radius: 20px 20px 0 0; padding: 20px; max-height:85vh; overflow:auto; }
.sheet h3 { margin-bottom: 12px; }
.mode-row { display:flex; gap:10px; margin-bottom:12px; }
.mode-btn { flex:1; padding:10px; border-radius:10px; background:var(--card2); border:1px solid var(--border); color:var(--muted); text-align:center; cursor:pointer; }
.mode-btn.active { color:var(--text); border-color:var(--accent); }
.btn { display:block; width:100%; padding:14px; border:none; border-radius:12px;
  background: var(--accent); color:#fff; font-weight:700; font-size:15px; margin-top:10px; cursor:pointer; }
.btn.secondary { background: var(--card2); color: var(--text); border:1px solid var(--border); }