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

:root {
  --bg: #0a0d14;
  --surface: #111827;
  --surface2: #1a2235;
  --border: rgba(255, 255, 255, 0.07);
  --text: #e2e8f0;
  --muted: #64748b;
  --accent: #3b82f6;
  --green: #22c55e;
  --red: #ef4444;
  --yellow: #f59e0b;
}

body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }

/* Header */
header {
  background: linear-gradient(135deg, #0f172a 0%, #111827 100%);
  border-bottom: 1px solid var(--border);
  padding: 18px 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: 9px; display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.logo h1 { font-size: 1.05rem; font-weight: 700; }
.logo span { font-size: 0.72rem; color: var(--muted); display: block; }
.header-right { display: flex; align-items: center; gap: 10px; }
.countdown { font-size: 0.78rem; color: var(--muted); font-variant-numeric: tabular-nums; }

#refresh-btn {
  background: var(--accent); border: none; color: #fff;
  padding: 7px 16px; border-radius: 7px; font-size: 0.8rem; font-weight: 600;
  cursor: pointer; font-family: inherit; transition: opacity .2s;
}
#refresh-btn:hover { opacity: .85; }
#refresh-btn:disabled { opacity: .5; cursor: not-allowed; }

/* Controls */
.controls {
  padding: 12px 28px;
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
}
.search-wrap { position: relative; min-width: 180px; max-width: 260px; flex: 1; }
.search-wrap svg { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); opacity: .4; }
#search {
  width: 100%; background: var(--surface); border: 1px solid var(--border);
  color: var(--text); padding: 7px 10px 7px 30px; border-radius: 7px;
  font-size: 0.82rem; font-family: inherit; outline: none; transition: border-color .2s;
}
#search:focus { border-color: var(--accent); }

.filter-group { display: flex; gap: 5px; }
.filter-btn {
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
  padding: 6px 12px; border-radius: 7px; font-size: 0.78rem; font-weight: 500;
  cursor: pointer; font-family: inherit; transition: all .2s;
}
.filter-btn.active, .filter-btn:hover {
  border-color: var(--accent); color: var(--accent); background: rgba(59, 130, 246, .08);
}
.stats { margin-left: auto; font-size: 0.75rem; color: var(--muted); }
.stats strong { color: var(--text); }

/* Table */
.table-wrap { padding: 0 28px 32px; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.84rem; }
thead tr { background: var(--surface); border-bottom: 1px solid var(--border); }

th {
  padding: 10px 14px; text-align: left;
  font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: .5px;
  color: var(--muted); white-space: nowrap; user-select: none; cursor: pointer; transition: color .2s;
}
th.exchange-col { text-align: center; min-width: 160px; }
th.exchange-col .exch-name { font-size: 0.8rem; font-weight: 700; color: var(--text); }
th.exchange-col .exch-sub { font-size: 0.68rem; color: var(--muted); font-weight: 400; letter-spacing: 0; text-transform: none; }
th:hover, th.sorted { color: var(--text); }
th.sorted { color: var(--accent); }
th .sort-icon { margin-left: 3px; font-size: 0.68rem; }

tbody tr { border-bottom: 1px solid var(--border); transition: background .15s; }
tbody tr:hover { background: var(--surface2); }
td { padding: 8px 14px; }

/* Symbol cell */
.sym { font-family: 'JetBrains Mono', monospace; font-weight: 600; font-size: 0.86rem; }
.sym-base { color: var(--muted); font-size: 0.72rem; font-family: 'JetBrains Mono', monospace; }

/* Funding rate cell */
td.fr-cell { text-align: center; padding: 6px 10px; }
.fr-box {
  display: inline-flex; flex-direction: column; align-items: center; gap: 3px;
  background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 12px; min-width: 140px;
}
.fr-val { font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 0.92rem; line-height: 1; }
.fr-pos  { color: var(--green); }
.fr-neg  { color: var(--red); }
.fr-zero { color: var(--muted); }
.fr-meta {
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  width: 100%; padding-top: 4px; border-top: 1px solid var(--border);
}
.fr-price { font-size: 0.67rem; color: var(--text); font-family: 'JetBrains Mono', monospace; }
.fr-pct-pos { font-size: 0.67rem; color: var(--green); }
.fr-pct-neg { font-size: 0.67rem; color: var(--red); }
.fr-nft { font-size: 0.67rem; color: var(--text); }
.fr-countdown { font-size: 0.65rem; color: var(--yellow); }

/* Empty exchange cell */
.exch-empty { text-align: center; color: rgba(255, 255, 255, 0.1); font-size: 0.75rem; letter-spacing: 1px; }

/* Loading */
.state-row td { text-align: center; padding: 60px; color: var(--muted); }
.spinner {
  display: inline-block; width: 24px; height: 24px;
  border: 3px solid rgba(59, 130, 246, .2); border-top-color: var(--accent);
  border-radius: 50%; animation: spin .7s linear infinite; margin-bottom: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 640px) {
  header, .controls, .table-wrap { padding-left: 14px; padding-right: 14px; }
}