:root {
  --bg: #0b0d12;
  --card-bg: #12151c;
  --card-bg-raised: #171b24;
  --border: #262b36;
  --text: #eef1f5;
  --text-dim: #8b93a3;
  --accent: #2d6cdf;
  --accent-hover: #3f7ce8;
  --accent-text: #fff;
  --green: #22c55e;
  --green-bg: #122019;
  --red: #ef4444;
  --red-bg: #2a1515;
  --amber-bg: #3a2f14;
  --amber-text: #e0b04a;
  --focus-ring: #5b9dff;
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 160ms ease;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: "Fira Sans", -apple-system, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding-bottom: 60px;
  font-size: 15px;
  line-height: 1.5;
}

.nums, .big-cost, .metric-tile .value, table td.num, table th.num {
  font-family: "Fira Code", ui-monospace, SFMono-Regular, monospace;
  font-variant-numeric: tabular-nums;
}

a { color: var(--accent); }

button {
  font-family: inherit;
  cursor: pointer;
}
button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 3px;
}

.icon {
  width: 15px;
  height: 15px;
  display: inline-block;
  vertical-align: -2px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

header {
  padding: 20px 24px 12px;
  position: relative;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
header .heading { display: flex; align-items: center; gap: 10px; }
header h1 { margin: 0; font-size: 21px; display: flex; align-items: center; gap: 8px; }
header h1 .icon { width: 22px; height: 22px; color: var(--accent); }
header .subtitle { margin: 4px 0 0; color: var(--text-dim); font-size: 13px; }
.settings-btn {
  background: none; border: 1px solid var(--border); color: var(--text);
  border-radius: var(--radius-sm); padding: 7px 10px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: border-color var(--transition), color var(--transition);
}
.settings-btn:hover { border-color: var(--accent); color: var(--accent); }

dialog {
  background: var(--card-bg); color: var(--text); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; width: 380px; max-width: 90vw;
}
dialog::backdrop { background: rgba(0,0,0,0.55); }
dialog h2 { margin-top: 0; font-size: 16px; }
dialog label { display: block; margin-top: 10px; font-size: 12px; font-weight: 600; }
dialog input {
  width: 100%; margin-top: 4px; padding: 8px 10px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  transition: border-color var(--transition);
}
dialog input:focus-visible { border-color: var(--accent); }
.dialog-actions { margin-top: 16px; display: flex; gap: 8px; }

.tabs {
  display: flex; gap: 4px; padding: 12px 24px 0;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tab-btn {
  background: none; border: none; color: var(--text-dim); padding: 10px 16px;
  cursor: pointer; font-size: 14px; border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }

main { max-width: 900px; margin: 0 auto; padding: 20px 24px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.card {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; margin-bottom: 16px;
}

.row { display: flex; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.row label { flex: 1; min-width: 140px; display: flex; flex-direction: column; font-size: 12px; font-weight: 600; gap: 4px; color: var(--text-dim); }
.row label.checkbox { flex-direction: row; align-items: center; gap: 8px; }

select, input[type="number"], input[type="date"], input[type="text"] {
  padding: 8px 10px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 13px; width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
}
select:focus-visible, input:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45, 108, 223, 0.25);
}
select:hover, input:hover { border-color: #3a4152; }

.leg-card {
  border: 1px solid var(--border); border-radius: 8px; padding: 12px; margin-bottom: 10px; background: var(--card-bg-raised);
}
.leg-card .leg-title { font-weight: 700; margin-bottom: 8px; font-size: 12px; color: var(--text-dim); }

button.secondary {
  width: 100%; padding: 8px; margin-bottom: 12px;
  background: none; border: 1px dashed var(--border); color: var(--text-dim); border-radius: var(--radius-sm);
  transition: border-color var(--transition), color var(--transition);
}
button.secondary:hover { border-color: var(--accent); color: var(--text); }

.actions { display: flex; gap: 10px; margin-top: 10px; }
.actions button {
  flex: 1; padding: 11px; border: none; border-radius: 7px; font-weight: 700; font-size: 13.5px;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  transition: background var(--transition), transform var(--transition), opacity var(--transition);
  min-height: 44px;
}
.actions button:active:not(:disabled) { transform: scale(0.98); }
button.primary { background: var(--accent); color: var(--accent-text); }
button.primary:hover:not(:disabled) { background: var(--accent-hover); }
#clearBtn, #closeSettingsBtn { background: var(--card-bg-raised); color: var(--text); border: 1px solid var(--border); }
#clearBtn:hover, #closeSettingsBtn:hover { border-color: var(--text-dim); }

.spinner {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.35); border-top-color: currentColor;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

.results .big-cost {
  font-size: 34px; font-weight: 700; margin: 6px 0 14px;
}
.metrics-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 10px 0; }
.metric-tile { background: var(--card-bg-raised); border: 1px solid var(--border); border-radius: 8px; padding: 12px; }
.metric-tile .label { font-size: 11px; color: var(--text-dim); margin-bottom: 4px; }
.metric-tile .value { font-size: 18px; font-weight: 700; }
.metric-tile .value.positive, .value.positive { color: var(--green); }
.metric-tile .value.negative, .value.negative { color: var(--red); }

.note { background: var(--amber-bg); color: var(--amber-text); border-radius: 6px; padding: 8px 10px; margin-top: 8px; font-size: 12.5px; }

.status { margin-top: 10px; font-size: 13px; min-height: 18px; display: flex; align-items: center; gap: 6px; }
.status.ok { color: var(--green); }
.status.err { color: var(--red); }

.banner { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 13px; }
.banner.error { background: var(--red-bg); color: #f3a0a0; border: 1px solid #6b2626; }

.remove-leg {
  float: right; border: none; background: none; color: var(--red); cursor: pointer; font-size: 11px;
  padding: 4px 6px; border-radius: 4px; transition: background var(--transition);
}
.remove-leg:hover { background: var(--red-bg); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--text-dim); font-weight: 600; }
th.num, td.num { text-align: right; }
tr.clickable { cursor: pointer; transition: background var(--transition); }
tr.clickable:hover { background: var(--card-bg-raised); }
td.positive { color: var(--green); }
td.negative { color: var(--red); }

.empty-state {
  text-align: center; padding: 32px 16px; color: var(--text-dim);
}
.empty-state .icon { width: 28px; height: 28px; margin-bottom: 8px; opacity: 0.6; }

#legDetail { margin-top: 16px; }

@media (max-width: 640px) {
  header { padding: 16px 16px 10px; }
  main { padding: 16px; }
  .tabs { padding: 10px 16px 0; }
  .metrics-grid { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); }
  .actions { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}