:root {
  --bg: #0F1620;
  --surface: #131B26;
  --row: #161F2C;
  --border: #263140;
  --text: #E7ECF2;
  --text-muted: #7C8A9B;
  --text-faint: #4C5766;
  --long: #35C787;
  --short: #E5566B;
  --accent: #5B8DEF;
  --radius: 6px;
  font-family: "IBM Plex Sans", -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

body {
  font-size: 15px;
  line-height: 1.5;
  padding-bottom: 48px;
}

.mono, .num {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-variant-numeric: tabular-nums;
}

a { color: var(--accent); text-decoration: none; }

header.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

header.top .brand {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
}

header.top .brand .dot {
  color: var(--long);
}

header.top nav a {
  color: var(--text-muted);
  margin-left: 18px;
  font-size: 14px;
}

header.top nav a.active { color: var(--text); }

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 16px;
}

.section-label {
  color: var(--text-muted);
  font-size: 13px;
  margin: 28px 0 10px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.section-label .count {
  color: var(--text-faint);
}

.list {
  border-top: 1px solid var(--border);
}

.row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 4px 12px 12px;
  border-bottom: 1px solid var(--border);
  border-left: 3px solid transparent;
}

.row.long { border-left-color: var(--long); }
.row.short { border-left-color: var(--short); }

.row .symbol {
  font-weight: 600;
  min-width: 84px;
}

.row .meta {
  color: var(--text-muted);
  font-size: 13px;
  flex: 1;
}

.row .figures {
  text-align: right;
}

.row .spread {
  font-size: 15px;
}

.row .spread.long { color: var(--long); }
.row .spread.short { color: var(--short); }

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

.empty {
  padding: 32px 4px;
  color: var(--text-muted);
  font-size: 14px;
  border-top: 1px solid var(--border);
}

form.auth {
  max-width: 320px;
  margin: 96px auto;
  padding: 0 20px;
}

form.auth h1 {
  font-size: 18px;
  margin-bottom: 24px;
}

form.auth label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

form.auth input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 10px 12px;
  font-size: 15px;
  margin-bottom: 16px;
}

form.auth input:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

form.auth button {
  width: 100%;
  background: var(--accent);
  color: #0B1420;
  border: none;
  border-radius: var(--radius);
  padding: 11px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

form.auth .error {
  color: var(--short);
  font-size: 13px;
  margin-bottom: 16px;
}

.a2hs-hint {
  margin: 20px 16px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--text-muted);
}

.flash {
  margin: 16px 0;
  padding: 10px 14px;
  background: rgba(53, 199, 135, 0.12);
  border: 1px solid var(--long);
  border-radius: var(--radius);
  color: var(--long);
  font-size: 13px;
}

main .error {
  margin: 16px 0;
  padding: 10px 14px;
  background: rgba(229, 86, 107, 0.1);
  border: 1px solid var(--short);
  border-radius: var(--radius);
  color: var(--short);
  font-size: 13px;
}

.inline-form {
  display: flex;
  gap: 8px;
  margin-top: 20px;
}

.inline-form input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 9px 11px;
  font-size: 14px;
  min-width: 0;
}

.btn-primary {
  background: var(--accent);
  color: #0B1420;
  border: none;
  border-radius: var(--radius);
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.btn-text {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  padding: 4px 8px;
}

.btn-text:hover { color: var(--short); }

.row.plain { border-left-color: transparent; }

.settings-group {
  border-top: 1px solid var(--border);
  padding: 4px 0 8px;
  margin-bottom: 8px;
}

.field {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 4px;
  border-bottom: 1px solid var(--border);
}

.field-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
}

.field label {
  font-size: 14px;
  color: var(--text);
}

.hint {
  font-size: 12px;
  color: var(--text-faint);
  line-height: 1.4;
  font-weight: 400;
}

.field input[type="text"] {
  width: 110px;
  flex-shrink: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 7px 10px;
  font-size: 14px;
  text-align: right;
}

.field.toggle label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.field.toggle input[type="checkbox"] {
  width: 17px;
  height: 17px;
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--accent);
}