/* ─── Foundation ─── */
:root {
  --bg: #0a0e14;
  --surface: #111820;
  --surface-2: #1a2230;
  --border: #1e2a3a;
  --border-subtle: #162030;
  --text: #c5cdd8;
  --text-dim: #5a6a7a;
  --text-bright: #e8ecf2;
  --accent: #4a9eff;
  --accent-dim: #2a5a8a;
  --green: #22c55e;
  --green-dim: #15532e;
  --red: #ef4444;
  --red-dim: #5a1a1a;
  --orange: #f59e0b;
  --orange-dim: #5a3a0a;
  --mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  font-size: 13px;
  line-height: 1.5;
}

/* ─── Header ─── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 48px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left { display: flex; align-items: baseline; gap: 8px; }
.header-left h1 {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-bright);
  letter-spacing: -0.02em;
}
.header-sub {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

nav { display: flex; gap: 2px; }
.tab {
  background: none;
  border: none;
  color: var(--text-dim);
  padding: 6px 14px;
  font-size: 12px;
  font-family: var(--sans);
  font-weight: 500;
  cursor: pointer;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
}
.tab:hover { color: var(--text); background: var(--surface-2); }
.tab.active { color: var(--text-bright); background: var(--surface-2); }
.tab-zh {
  display: block;
  font-size: 10px;
  font-weight: 400;
  color: var(--text-dim);
  margin-top: 1px;
}
.tab.active .tab-zh { color: var(--text-dim); }

/* ─── Main ─── */
main {
  padding: 16px 24px 32px;
  max-width: 1400px;
  margin: 0 auto;
}
.page { display: none; }
.page.active { display: block; animation: fadeIn 0.2s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Schedule Bar ─── */
.schedule-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
}
.schedule {
  padding: 3px 10px;
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
}
.schedule.active { background: var(--green-dim); color: var(--green); }
.schedule.premarket { background: var(--orange-dim); color: var(--orange); }
.schedule.off { background: var(--surface-2); color: var(--text-dim); }
.schedule-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-dim);
}
.schedule.active + .schedule-dot { background: var(--green); animation: pulse 2s ease infinite; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.last-update { color: var(--text-dim); font-size: 11px; margin-left: auto; font-family: var(--mono); }
.btn-refresh {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 11px;
  font-family: var(--sans);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.btn-refresh:hover { border-color: var(--accent-dim); color: var(--accent); }
.btn-refresh:disabled { opacity: 0.3; cursor: not-allowed; }
.fetch-status { color: var(--text-dim); font-size: 11px; font-family: var(--mono); min-width: 80px; }

/* ─── Monitor Grid ─── */
.monitor-grid {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 16px;
  margin-bottom: 16px;
}
@media (max-width: 900px) {
  .monitor-grid { grid-template-columns: 1fr; }
  main { padding: 12px 16px 24px; }
}

/* ─── Chart ─── */
.chart-area {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  min-height: 380px;
  display: flex;
  flex-direction: column;
}
.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.chart-label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.chart-time {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
}
.chart-area canvas { flex: 1; }
.chart-canvas-wrap { width: 100%; }
.chart-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 13px;
  font-family: var(--mono);
}

/* ─── Sidebar ─── */
.sidebar { display: flex; flex-direction: column; gap: 2px; }

.price-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 8px;
}
.price-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.price-value {
  font-family: var(--mono);
  font-size: 36px;
  font-weight: 600;
  color: var(--green);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

/* ─── Data Groups ─── */
.data-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
}
.data-group h3 {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
}
.kv {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 0;
  font-size: 12px;
}
.kv span:first-child { color: var(--text-dim); }
.kv span:last-child {
  font-family: var(--mono);
  font-weight: 500;
  color: var(--text-bright);
}

/* ─── Event Log ─── */
.event-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  overflow-x: auto;
}
.event-section h3 {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}
table { width: 100%; border-collapse: collapse; font-size: 12px; }
th {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: left;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
}
td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text);
}
td:first-child { font-family: var(--mono); color: var(--text-dim); }
.empty-state {
  text-align: center;
  padding: 32px;
  color: var(--text-dim);
  font-size: 12px;
  display: none;
}
.event-section:has(tbody:empty) .empty-state { display: block; }
.event-section:has(tbody:empty) table { display: none; }

/* ─── Premarket ─── */
.premarket-layout { max-width: 800px; }
.pm-header { margin-bottom: 20px; }
.pm-header h2 {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-bright);
  letter-spacing: -0.02em;
}
.pm-subtitle {
  color: var(--text-dim);
  font-size: 13px;
  margin-top: 4px;
}
.pm-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}
@media (max-width: 700px) { .pm-grid { grid-template-columns: 1fr; } }

.scenarios { margin-top: 4px; }
.scenario-card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-top: 8px;
  transition: border-color 0.15s;
}
.scenario-card:hover { border-color: var(--border); }
.scenario-tag {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
}
.scenario-text {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}
.pm-source {
  color: var(--text-dim);
  font-size: 11px;
  margin-top: 10px;
  font-family: var(--mono);
}

/* ─── Settings ─── */
.settings-layout { max-width: 440px; }
.settings-layout h2 {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-bright);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text);
}
.toggle-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}
.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
}
.form-row label { color: var(--text-dim); font-size: 12px; }
.input-group { display: flex; align-items: center; gap: 6px; }
.input-group input {
  width: 72px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 8px;
  color: var(--text-bright);
  font-family: var(--mono);
  font-size: 13px;
  text-align: right;
}
.input-group input:focus {
  outline: none;
  border-color: var(--accent-dim);
}
.input-suffix {
  font-size: 11px;
  color: var(--text-dim);
  min-width: 24px;
}
.settings-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}
.btn-primary {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  padding: 8px 24px;
  border-radius: 5px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn-primary:hover {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.save-status {
  font-size: 12px;
  color: var(--green);
  font-family: var(--mono);
}

/* ─── Stagger Animation ─── */
.data-group:nth-child(1) { animation: slideUp 0.3s ease 0.05s both; }
.data-group:nth-child(2) { animation: slideUp 0.3s ease 0.1s both; }
.data-group:nth-child(3) { animation: slideUp 0.3s ease 0.15s both; }
.data-group:nth-child(4) { animation: slideUp 0.3s ease 0.2s both; }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Event Colors ─── */
.ev-break { color: var(--red); font-weight: 500; }
.ev-test { color: var(--orange); }
.ev-other { color: var(--green); }

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }