:root {
  color-scheme: light dark;
  --bg: #f7f7f8;
  --surface: #ffffff;
  --text: #1b1d1f;
  --muted: #6b7280;
  --border: #e3e5e8;
  --accent: #2563eb;
  --pos: #157347;
  --neg: #c0392b;
  --live: #c0392b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --surface: #1f2227;
    --text: #e7e9ea;
    --muted: #9aa0a6;
    --border: #2c2f36;
    --accent: #5b9dff;
    --pos: #34c471;
    --neg: #ff6b5e;
    --live: #ff6b5e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
}

nav {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

nav a {
  padding: 9px 18px;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  transition: background-color 0.15s ease, color 0.15s ease;
}

nav a:hover { color: var(--text); background: color-mix(in srgb, var(--text) 7%, transparent); }
nav a.active { color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

h1 {
  font-size: 18px;
  margin: 28px 0 12px;
}

h1:first-child { margin-top: 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 20px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

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

.pos { color: var(--pos); }
.neg { color: var(--neg); }

.live-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  background: var(--live);
  padding: 1px 6px;
  border-radius: 4px;
  margin-left: 6px;
  vertical-align: middle;
}

button {
  font: inherit;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  transition: transform 0.1s ease, box-shadow 0.15s ease, border-color 0.15s ease, color 0.15s ease, filter 0.15s ease;
}

button:hover { border-color: var(--accent); color: var(--accent); box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1); transform: translateY(-1px); }
button:active { transform: translateY(0); box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08); }
button:disabled { opacity: 0.5; cursor: default; transform: none; box-shadow: none; }

button[data-action="buy"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 35%, transparent);
}

button[data-action="buy"]:hover {
  color: #fff;
  border-color: var(--accent);
  filter: brightness(1.1);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--accent) 45%, transparent);
}

button[data-action="sell"], button[data-action="confirmsell"] {
  background: var(--neg);
  border-color: var(--neg);
  color: #fff;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--neg) 35%, transparent);
}

button[data-action="sell"]:hover, button[data-action="confirmsell"]:hover {
  color: #fff;
  border-color: var(--neg);
  filter: brightness(1.1);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--neg) 45%, transparent);
}

form.settings-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 20px;
}

details.field-help {
  margin-top: 5px;
}

details.field-help summary {
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  user-select: none;
}

details.field-help summary::-webkit-details-marker { display: none; }
details.field-help summary::marker { content: ""; }

details.field-help summary::before {
  content: "?";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  font-size: 10px;
  line-height: 1;
  flex-shrink: 0;
}

details.field-help[open] summary::before { content: "\2212"; }

details.field-help p {
  margin: 6px 0 0;
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.5;
}

.help-svg {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 8px 0 0;
}

@media (max-width: 560px) {
  form.settings-form { grid-template-columns: 1fr; }
}

label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--muted);
}

label.checkbox {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

input[type="text"], input[type="number"], select {
  font: inherit;
  padding: 7px 9px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.section-title {
  grid-column: 1 / -1;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--muted);
  margin: 10px 0 -4px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.regime-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 4px;
  margin-left: 6px;
  vertical-align: middle;
  color: #fff;
}

.regime-badge.mean-reversion { background: #7c5cff; }
.regime-badge.momentum { background: #ff9f1c; }
.regime-badge.warming-up { background: var(--muted); }

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 6px;
}

#settings-status { font-size: 13px; }

.add-pair-form {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.muted { color: var(--muted); }

.interval-selector {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.interval-selector button {
  padding: 4px 12px;
}

.interval-selector button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.pair-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.pair-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}

.pair-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.pair-card-header h2 {
  margin: 0;
  font-size: 22px;
}

.pair-card-controls {
  display: flex;
  gap: 18px;
  margin-bottom: 10px;
}

.pair-card-controls label { font-size: 13px; }

.override-input { width: 70px; padding: 4px 6px; }

.pair-chart {
  height: 130px;
  border-radius: 6px;
  background: var(--bg);
  overflow: hidden;
}

.chart-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.chart-empty {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}

.chart-pair-selector {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.chart-pair-selector button {
  padding: 5px 14px;
  font-weight: 600;
}

.chart-pair-selector button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.chart-info {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  margin-bottom: 12px;
  padding: 10px 4px;
}

.chart-info .stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.chart-info .stat span {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.chart-info .stat strong {
  font-size: 16px;
}

#portfolio-summary {
  gap: 34px;
  padding: 16px 6px;
}

#portfolio-summary .stat span {
  font-size: 12px;
}

#portfolio-summary .stat strong {
  font-size: 26px;
}

.big-chart {
  width: 100%;
  height: 420px;
  border-radius: 8px;
  overflow: hidden;
}

.chart-tooltip {
  margin-top: 8px;
  font-size: 12px;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.equity-chart {
  width: 100%;
  height: 260px;
  border-radius: 8px;
  overflow: hidden;
}