:root {
  --bg: #0f0f12;
  --surface: #1a1a1f;
  --border: #2a2a32;
  --text: #e4e4e7;
  --muted: #71717a;
  --accent: #3b82f6;
  --green: #22c55e;
  --red: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 1rem 1.5rem 2rem;
  line-height: 1.5;
}

header {
  margin-bottom: 2rem;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

/* Hamburger: hidden on desktop */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  color: var(--text);
}

.hamburger-btn:hover {
  background: var(--border);
}

.hamburger-line {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

header.nav-open .hamburger-btn .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
header.nav-open .hamburger-btn .hamburger-line:nth-child(2) {
  opacity: 0;
}
header.nav-open .hamburger-btn .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.main-nav {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.nav-btn {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.nav-btn:hover {
  background: var(--border);
}

.nav-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Mobile: hamburger + collapsible nav */
@media (max-width: 768px) {
  .hamburger-btn {
    display: flex;
  }

  .main-nav {
    display: none;
    flex-direction: column;
    margin-top: 0.25rem;
    padding: 0.5rem 0;
    border-top: 1px solid var(--border);
  }

  header.nav-open .main-nav {
    display: flex;
  }

  .nav-btn {
    width: 100%;
    text-align: left;
    padding: 0.6rem 1rem;
  }
}

.page {
  display: none;
}

.page.active {
  display: block;
}

.refresh {
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0;
}

h2 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.75rem 0;
  color: var(--muted);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.section-header h2 {
  margin: 0;
}

.export-btn {
  padding: 0.4rem 0.75rem;
  font-size: 0.8125rem;
  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.export-btn:hover {
  background: var(--border);
}

.ticker-link {
  color: var(--accent);
  text-decoration: none;
}

.ticker-link:hover {
  text-decoration: underline;
}

section {
  margin-bottom: 2rem;
}

.stats .stat-cards,
.dashboard-summary .stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
}

.realtime-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.realtime-title-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.realtime-header h2 {
  margin: 0;
}

.realtime-time-remaining {
  font-size: 0.875rem;
  color: #fff;
}

.realtime-mode {
  font-size: 0.875rem;
  color: #fff;
}

.market-link-btn {
  padding: 0.4rem 0.75rem;
  font-size: 0.8125rem;
  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
}

.market-link-btn:hover {
  background: var(--border);
}

.market-link-btn[href="#"] {
  pointer-events: none;
  opacity: 0.6;
}

.realtime-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.card .label {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.card .value {
  font-size: 1.25rem;
  font-weight: 600;
}

.card .value.positive { color: var(--green); }
.card .value.negative { color: var(--red); }

.table-wrap {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

thead th {
  text-align: left;
  padding: 0.6rem 0.75rem;
  background: var(--bg);
  color: var(--muted);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
}

tbody td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

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

.settings .version-line {
  font-size: 0.875rem;
  margin: 0 0 0.5rem 0;
  color: var(--muted);
}

.settings details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
}

.settings summary {
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--accent);
}

.settings pre {
  margin: 0.75rem 0 0 0;
  padding: 0.75rem;
  background: var(--bg);
  border-radius: 6px;
  font-size: 0.75rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.empty {
  color: var(--muted);
  font-style: italic;
}

.model-settings .settings-version-line {
  font-size: 0.875rem;
  margin: 0 0 1rem 0;
  color: var(--muted);
}

.settings-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

/* Live log feed */
.live-log h2 {
  margin: 0 0 0.5rem 0;
}

.live-log-desc {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0 0 1rem 0;
}

.log-feed-wrap {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  max-height: 70vh;
  overflow: auto;
}

.log-feed {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.8125rem;
  line-height: 1.5;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
}

@media (max-width: 720px) {
  .settings-columns {
    grid-template-columns: 1fr;
  }
}