:root {
  color-scheme: light;
  --ink: #17202a;
  --muted: #56616d;
  --paper: #ffffff;
  --canvas: #f4f6f8;
  --panel: #f8f9fa;
  --rule: #83909b;
  --rule-light: #d7dde2;
  --accent: #005ea8;
  --accent-dark: #004477;
  --danger: #9c2f24;
  --focus: #ffbf47;
  --low: #d8dde2;
  --target: #e7f3ec;
  --high: #4b5560;
  --radius: 4px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { max-width: 100%; overflow-x: hidden; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  max-width: 100%;
  overflow-x: hidden;
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  color: var(--ink);
  background: var(--canvas);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

button, input, select, textarea { font: inherit; }

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

.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 20;
  padding: 10px 14px;
  color: var(--paper);
  background: var(--ink);
}
.skip-link:focus { top: 12px; }

.page-shell {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding-bottom: calc(48px + env(safe-area-inset-bottom));
}

button, .button, .legend-button, summary, input, select, a {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  padding: 28px 0 18px;
  border-bottom: 3px solid var(--ink);
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2 { line-height: 1.15; }
h1 { margin: 0; font-size: clamp(1.75rem, 4vw, 2.5rem); letter-spacing: -0.025em; }
h2 { margin: 0; font-size: 1.2rem; }
.subtitle { max-width: 760px; margin: 6px 0 0; color: var(--muted); }

.header-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  flex: none;
}

.warning-badge, .version-badge, .example-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.warning-badge { color: var(--danger); background: #fff7f5; }
.version-badge { color: var(--muted); background: var(--paper); }
.example-badge { color: var(--accent-dark); background: #edf6fc; }

.card, details {
  margin-bottom: 18px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 1px 2px rgb(23 32 42 / 0.05);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--rule);
  background: #edf1f4;
}
.card-header p { margin: 3px 0 0; color: var(--muted); font-size: 0.86rem; }
.card-body { padding: 16px; }

.table-scroll {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--rule-light);
}
.table-scroll:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

table { width: 100%; border-collapse: collapse; }
.regimen-table { min-width: 860px; font-size: 0.82rem; }
.parameter-table { min-width: 900px; font-size: 0.78rem; }
th, td { padding: 7px 8px; border-right: 1px solid var(--rule-light); border-bottom: 1px solid var(--rule-light); text-align: center; vertical-align: middle; }
th { background: var(--panel); font-weight: 800; }
th:last-child, td:last-child { border-right: 0; }
tbody tr:last-child td { border-bottom: 0; }
.regimen-table td:nth-child(2), .parameter-table td:first-child, .parameter-table td:nth-child(3), .parameter-table td:nth-child(4) { text-align: left; }
.regimen-table input[type="time"] { width: 110px; }
.regimen-table input[type="number"] { width: 100px; }
.regimen-table select { width: min(330px, 100%); }
.empty-row { padding: 22px; color: var(--muted); text-align: left; }

input, select, textarea {
  min-height: 44px;
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 8px 10px;
  color: var(--ink);
  background: var(--paper);
}
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}
input[aria-invalid="true"] { border-color: var(--danger); box-shadow: 0 0 0 1px var(--danger); }

.button-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.button {
  min-height: 44px;
  border: 1px solid var(--ink);
  border-radius: 3px;
  padding: 8px 13px;
  color: var(--ink);
  background: var(--paper);
  font-weight: 750;
  cursor: pointer;
}
.button:hover { background: #e9edf0; }
.button-primary { color: var(--paper); border-color: var(--accent-dark); background: var(--accent-dark); }
.button-primary:hover { background: #002f53; }
.remove-button { min-width: 44px; min-height: 44px; padding: 6px; color: var(--danger); }
.curve-chip { display: inline-block; width: 18px; height: 5px; border: 1px solid rgb(0 0 0 / 0.2); }

.settings {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
  margin: 16px 0 0;
  border: 1px solid var(--rule-light);
  padding: 14px;
}
.settings legend { padding: 0 6px; font-weight: 800; }
.field { grid-column: span 2; display: flex; flex-direction: column; gap: 4px; }
.field-small { grid-column: span 1; }
.field-wide { grid-column: span 1; }
.field label { font-size: 0.8rem; font-weight: 800; }
.field label span { color: var(--muted); font-weight: 500; }

.hint { margin: 8px 0 0; color: var(--muted); font-size: 0.8rem; }
.form-message { min-height: 1.5em; margin: 8px 0 0; color: var(--danger); font-size: 0.85rem; font-weight: 700; }
.form-message.success { color: #146c43; }

.readout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 16px 16px 4px;
}
.readout > div { min-width: 0; }
.readout-label { display: block; color: var(--muted); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; }
.readout strong { display: block; overflow-wrap: anywhere; font-size: clamp(1.45rem, 4vw, 2.25rem); line-height: 1.1; font-variant-numeric: tabular-nums; }
.readout .zone-readout { font-size: clamp(1rem, 3vw, 1.4rem); }
.contributions { min-height: 1.5em; margin: 4px 16px; color: var(--muted); font-size: 0.83rem; }

.chart-box { padding: 0 8px; touch-action: pan-y; }
.chart-box svg { display: block; width: 100%; height: auto; }
.chart-control { padding: 12px 16px; border-top: 1px solid var(--rule-light); }
.chart-control label { font-weight: 800; }
.chart-control output { font-variant-numeric: tabular-nums; }
.chart-control input[type="range"] { width: 100%; min-height: 34px; padding: 0; }

.legend { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 16px 16px; border-top: 1px solid var(--rule-light); }
.legend-button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  border: 1px solid var(--rule-light);
  border-radius: 999px;
  padding: 6px 11px;
  color: var(--ink);
  background: var(--paper);
  cursor: pointer;
}
.legend-button[aria-pressed="false"] { opacity: 0.52; text-decoration: line-through; }
.legend-swatch { width: 20px; height: 4px; flex: none; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; }
.stat { border: 1px solid var(--rule-light); border-left: 4px solid var(--accent); padding: 10px 12px; background: var(--panel); }
.stat-value { display: block; font-size: 1.4rem; font-weight: 850; font-variant-numeric: tabular-nums; }
.stat-label { display: block; font-size: 0.72rem; font-weight: 850; letter-spacing: 0.05em; text-transform: uppercase; }
.stat-note { color: var(--muted); font-size: 0.75rem; }

details summary { padding: 12px 16px; background: #edf1f4; font-weight: 800; cursor: pointer; }
.details-body { min-width: 0; padding: 16px; border-top: 1px solid var(--rule); }
details:not([open]) > .details-body { display: none; }
.details-body > :first-child { margin-top: 0; }
.details-body > :last-child { margin-bottom: 0; }
.prose { max-width: 90ch; }
textarea { width: 100%; min-height: 180px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.8rem; }

.site-footer { margin-top: 24px; border-top: 3px solid var(--ink); padding-top: 14px; color: var(--muted); font-size: 0.82rem; }
.site-footer p { margin: 4px 0; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 850px) {
  .site-header { flex-direction: column; }
  .header-meta { align-items: flex-start; }
  .settings { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .field, .field-small, .field-wide { grid-column: span 1; }
}

@media (max-width: 560px) {
  .page-shell { width: min(100% - 20px, 1160px); }
  .site-header { padding-top: 18px; }
  .card-header { padding: 11px 12px; }
  .card-body, .details-body { padding: 12px; }
  .settings, .readout { grid-template-columns: 1fr; }
  .field, .field-small, .field-wide { grid-column: 1; }
  .readout { gap: 14px; padding: 12px; }
  .contributions { margin-inline: 12px; }
  .button { flex: 1 1 140px; }
}

/* Phone layout: the regimen table becomes stacked dose cards instead of a
   sideways-scrolling table. Scoped to screen so printing keeps the table. */
@media screen and (max-width: 640px) {
  .regimen-table { min-width: 0; }
  .regimen-table thead { display: none; }
  .regimen-table tbody { display: block; }
  .regimen-table tbody tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 44px;
    gap: 10px;
    padding: 12px 10px;
    border-bottom: 1px solid var(--rule-light);
  }
  .regimen-table tbody tr:last-child { border-bottom: 0; }
  .regimen-table td {
    display: block;
    min-width: 0;
    padding: 0;
    border: 0;
    text-align: left;
  }
  .regimen-table td::before {
    display: block;
    margin-bottom: 2px;
    color: var(--muted);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }
  .regimen-table td:nth-child(2) { grid-column: 1 / 3; grid-row: 1; }
  .regimen-table td:nth-child(6) { grid-column: 3; grid-row: 1; justify-self: end; }
  .regimen-table td:nth-child(1) { grid-column: 1; grid-row: 2; }
  .regimen-table td:nth-child(3) { grid-column: 2 / 4; grid-row: 2; }
  .regimen-table td:nth-child(4) { grid-column: 1; grid-row: 3; }
  .regimen-table td:nth-child(5) { grid-column: 2; grid-row: 3; align-self: end; padding-bottom: 8px; }
  .regimen-table td:nth-child(1)::before { content: "Time"; }
  .regimen-table td:nth-child(3)::before { content: "Dose (mg)"; }
  .regimen-table td:nth-child(4)::before { content: "LEDD contribution"; }
  .regimen-table input[type="time"],
  .regimen-table input[type="number"],
  .regimen-table select { width: 100%; }
  .regimen-table .empty-row { grid-column: 1 / -1; padding: 16px 4px; }
}

/* Touch devices: larger targets, and 16px+ form text so iOS Safari
   does not auto-zoom when a field receives focus. */
@media (pointer: coarse) {
  .button:active { background: #dfe5e9; }
  .button-primary:active { background: #00223d; }
  .regimen-table input,
  .regimen-table select,
  textarea {
    font-size: 16px;
  }
  .regimen-table input[type="time"] { width: 122px; }
  .regimen-table input[type="number"] { width: 108px; }
  .chart-control input[type="range"] { min-height: 44px; }
  .legend-button { min-height: 48px; }
  details summary { padding: 14px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media print {
  body { background: var(--paper); font-size: 12px; }
  .page-shell { width: 100%; }
  .button-row, .settings, .chart-control, details:not([open]), .hint, .skip-link { display: none !important; }
  .card, details { break-inside: avoid; box-shadow: none; }
  .chart-box svg { min-width: 0; }
}