:root {
  --bg: #0f1117;
  --card-bg: #1a1d28;
  --border: #2a2d3a;
  --text: #e1e4ea;
  --text-muted: #8b8fa3;
  --accent-blue: #4a9eff;
  --accent-green: #22c55e;
  --accent-red: #ef4444;
  --accent-yellow: #eab308;
  --accent-orange: #f97316;
  --btc-color: #f7931a;
  --bch-color: #8dc351;
  --ratio-color: #a78bfa;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, monospace;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--card-bg);
}

.header h1 {
  font-size: 18px;
  font-weight: 600;
}

.header-status {
  display: flex;
  align-items: center;
  gap: 12px;
}

.status-badge {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.status-badge.connected { background: rgba(34,197,94,0.15); color: var(--accent-green); }
.status-badge.disconnected { background: rgba(239,68,68,0.15); color: var(--accent-red); }

.last-update { font-size: 12px; color: var(--text-muted); }

/* Alert Banner */
.alert-banner {
  padding: 12px 24px;
  font-weight: 600;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: opacity 0.3s;
}

.alert-banner.signal-buy { background: rgba(34,197,94,0.15); color: var(--accent-green); border-bottom: 2px solid var(--accent-green); }
.alert-banner.signal-sell { background: rgba(249,115,22,0.15); color: var(--accent-orange); border-bottom: 2px solid var(--accent-orange); }
.alert-banner.signal-above { background: rgba(239,68,68,0.15); color: #ef4444; border-bottom: 2px solid #ef4444; }
.alert-banner.signal-below { background: rgba(34,197,94,0.15); color: var(--accent-green); border-bottom: 2px solid var(--accent-green); }
.alert-banner.hidden { display: none; }

/* Layout */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 16px;
  padding: 16px 24px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.card h2 { font-size: 16px; font-weight: 600; }
.card h3 { font-size: 14px; font-weight: 600; margin-bottom: 12px; }

/* Badges */
.price-badges { display: flex; gap: 8px; }

.badge {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  font-family: monospace;
}

.btc-badge { background: rgba(247,147,26,0.15); color: var(--btc-color); }
.bch-badge { background: rgba(141,195,81,0.15); color: var(--bch-color); }
.ratio-badge { background: rgba(167,139,250,0.15); color: var(--ratio-color); }

/* Chart */
.chart-container {
  position: relative;
  height: 400px;
  width: 100%;
}

.chart-container-sm {
  height: 250px;
}

/* Stats */
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-value { font-size: 16px; font-weight: 700; font-family: monospace; }

/* Trade Form */
.trade-form { display: flex; flex-direction: column; gap: 12px; }

.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group label { font-size: 12px; color: var(--text-muted); }

.form-group select,
.form-group input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
  font-family: monospace;
}

.form-group select:focus,
.form-group input:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.button-row { display: flex; gap: 8px; }

.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  flex: 1;
  transition: opacity 0.2s;
}

.btn:hover { opacity: 0.85; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary { background: var(--accent-blue); color: #fff; }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-danger { background: var(--accent-red); color: #fff; }

/* Trade Preview */
.trade-preview {
  margin-top: 12px;
  padding: 12px;
  border-radius: 6px;
  background: var(--bg);
  font-size: 13px;
  font-family: monospace;
  line-height: 1.6;
}

.trade-preview.hidden { display: none; }

.trade-status {
  margin-top: 8px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
}

.trade-status.hidden { display: none; }

/* History */
.history-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 0 24px 24px;
}

.table-scroll { max-height: 250px; overflow-y: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

th, td {
  padding: 6px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: sticky;
  top: 0;
  background: var(--card-bg);
}

td { font-family: monospace; }

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.hidden { display: none; }

.modal-content {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  max-width: 480px;
  width: 90%;
}

.modal-content h3 { margin-bottom: 16px; }

#confirm-details {
  padding: 12px;
  background: var(--bg);
  border-radius: 6px;
  font-family: monospace;
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 16px;
}

.modal-actions {
  display: flex;
  gap: 8px;
}

/* Account Balances */
.balance-list { display: flex; flex-direction: column; gap: 12px; }

.balance-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.balance-row:last-of-type { border-bottom: none; }

.balance-icon {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
}

.krw-badge { background: rgba(74,158,255,0.15); color: var(--accent-blue); }

.balance-values {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.balance-amount {
  font-family: monospace;
  font-size: 14px;
  font-weight: 600;
}

.balance-krw {
  font-family: monospace;
  font-size: 11px;
  color: var(--text-muted);
}

.balance-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 2px solid var(--border);
  margin-top: 4px;
}

.balance-total-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.balance-total-value {
  font-family: monospace;
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-blue);
}

/* Notification Settings */
.notif-form { display: flex; flex-direction: column; gap: 12px; }

.toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
}

.toggle-label input[type="checkbox"] {
  accent-color: var(--accent-blue);
  width: 16px;
  height: 16px;
}

.notif-status {
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 4px;
  background: var(--bg);
}

.notif-status.configured { color: var(--accent-green); }
.notif-status.not-configured { color: var(--accent-yellow); }

/* Login Modal */
.login-modal-content {
  max-width: 360px;
  text-align: center;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.login-error {
  color: var(--accent-red);
  font-size: 13px;
  min-height: 20px;
  margin-bottom: 8px;
}

.btn-full { width: 100%; }

.btn-sm {
  padding: 4px 12px;
  font-size: 12px;
}

/* Responsive */
@media (max-width: 900px) {
  .main-grid { grid-template-columns: 1fr; }
  .history-section { grid-template-columns: 1fr; }
}