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

:root {
  --bg: #0f172a;
  --bg-elev: #1e293b;
  --bg-row: #243348;
  --fg: #f1f5f9;
  --fg-dim: #94a3b8;
  --accent: #38bdf8;
  --positive: #4ade80;
  --negative: #f87171;
}

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 20px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hidden {
  display: none !important;
}

.state {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.state-loading,
.state-empty,
.state-error {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 16px;
}

.state-empty h1,
.state-error h1 {
  font-size: 22px;
  font-weight: 600;
}

.state-empty p,
.state-error p {
  color: var(--fg-dim);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--bg-row);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── balance state ──────────────────────────── */

header {
  margin-bottom: 24px;
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 6px;
}

#holder-name {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.hero {
  background: var(--bg-elev);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 16px;
  text-align: center;
}

.hero-label {
  font-size: 13px;
  color: var(--fg-dim);
  margin-bottom: 8px;
}

.hero-amount {
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}

.hero-currency {
  font-size: 22px;
  color: var(--fg-dim);
  margin-left: 6px;
}

.hero-sub {
  margin-top: 12px;
  font-size: 13px;
  color: var(--fg-dim);
  font-variant-numeric: tabular-nums;
}

.breakdown {
  background: var(--bg-elev);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 16px;
}

.row {
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 14px;
}

.row + .row {
  border-top: 1px solid var(--bg-row);
}

.row-label {
  color: var(--fg-dim);
}

.row-value {
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.row-value.positive { color: var(--positive); }
.row-value.negative { color: var(--negative); }

.row-meta {
  font-size: 12px;
  color: var(--fg-dim);
  font-weight: 400;
  margin-left: 4px;
}

.row-divider {
  border-top: 4px solid var(--bg-row) !important;
}

/* ── recent trades ──────────────────────────── */

.trades {
  background: var(--bg-elev);
  border-radius: 16px;
  overflow: hidden;
}

.section-label {
  padding: 14px 18px 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.trade-list {
  list-style: none;
}

.trade-list li {
  padding: 12px 18px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  border-top: 1px solid var(--bg-row);
}

.trade-date {
  color: var(--fg-dim);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.trade-symbol {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.trade-pnl {
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  white-space: nowrap;
}

.trade-pnl.positive { color: var(--positive); }
.trade-pnl.negative { color: var(--negative); }

.trade-empty {
  padding: 16px 18px !important;
  color: var(--fg-dim);
  font-style: italic;
  text-align: center;
}

/* ── footer ──────────────────────────── */

footer {
  margin-top: 24px;
  text-align: center;
}

.meta {
  font-size: 12px;
  color: var(--fg-dim);
}

@media (max-width: 360px) {
  .hero-amount { font-size: 36px; }
  #holder-name { font-size: 22px; }
}