/* app.css — Effect Curve UI.
 * Aesthetic: "precise instrument meets lab notebook" — clinical but warm.
 * All color/space from the design tokens in :root. Mono font on every number.
 */

:root {
  /* core palette */
  --paper: #F7F7F4;
  --ink: #1A1D21;
  --muted: #6A7078;
  --hairline: #E4E5E1;
  --accent: #2E4D54;          /* deep slate-teal */

  /* surfaces derived from paper */
  --surface: #FFFFFF;
  --surface-sunk: #F1F1ED;
  --accent-soft: rgba(46, 77, 84, 0.08);
  --accent-ring: rgba(46, 77, 84, 0.45);

  /* type */
  --font-ui: Inter, "Helvetica Neue", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* spacing scale */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;

  --radius: 8px;
  --radius-sm: 5px;
  --shadow-card: 0 1px 2px rgba(26, 29, 33, 0.05), 0 1px 1px rgba(26, 29, 33, 0.04);

  --controls-w: 360px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

/* focus rings — visible and consistent */
:focus-visible {
  outline: 2px solid var(--accent-ring);
  outline-offset: 2px;
  border-radius: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: var(--s-2) var(--s-3);
  z-index: 100;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

/* --------------------------------------------------------------------- */
/* Header                                                                */
/* --------------------------------------------------------------------- */
.app-header {
  border-bottom: 1px solid var(--hairline);
  background: var(--surface);
}
.app-header__inner {
  max-width: 1500px;
  margin: 0 auto;
  padding: var(--s-4) var(--s-5);
  display: flex;
  align-items: baseline;
  gap: var(--s-4);
  flex-wrap: wrap;
}
.app-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--s-2);
}
.app-title__mark {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), #2E8B8B);
  display: inline-block;
}
.app-tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------- */
/* Layout                                                                */
/* --------------------------------------------------------------------- */
.layout {
  max-width: 1500px;
  margin: 0 auto;
  padding: var(--s-5);
  display: grid;
  grid-template-columns: var(--controls-w) minmax(0, 1fr);
  gap: var(--s-5);
  align-items: start;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  position: sticky;
  top: var(--s-4);
}

.hero {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  min-width: 0;
}

/* --------------------------------------------------------------------- */
/* Search bar                                                            */
/* --------------------------------------------------------------------- */
.searchbar__label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: var(--s-2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.searchbar__wrap { position: relative; }
.searchbar__input {
  width: 100%;
  padding: 10px var(--s-3);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.95rem;
}
.searchbar__input::placeholder { color: var(--muted); }
.searchbar__input:focus-visible { border-color: var(--accent); }

.searchbar__list {
  list-style: none;
  margin: var(--s-1) 0 0;
  padding: var(--s-1);
  position: absolute;
  z-index: 30;
  left: 0;
  right: 0;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  box-shadow: 0 6px 20px rgba(26, 29, 33, 0.12);
  max-height: 320px;
  overflow-y: auto;
}
.searchbar__option {
  /* Two rows now: name+category, then the brand names that matched. */
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: var(--s-2) var(--s-3);
  border-radius: 4px;
  cursor: pointer;
}
.searchbar__optmain {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-3);
}
/* Brand names under the generic. Kept on one line - if a drug has a dozen
   brands the row must not grow tall enough to push the rest of the list
   off-screen. */
.searchbar__optalias {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
/* The term the user actually typed, so the reason for the match is obvious. */
.searchbar__optalias .is-match {
  color: var(--accent);
  font-weight: 600;
}
.searchbar__option.is-active,
.searchbar__option:hover { background: var(--accent-soft); }
.searchbar__option.is-added { opacity: 0.55; cursor: default; }
.searchbar__optname { font-weight: 500; }
.searchbar__optcat {
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.searchbar__empty {
  padding: var(--s-2) var(--s-3);
  color: var(--muted);
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------- */
/* Banners (error / status)                                             */
/* --------------------------------------------------------------------- */
.banner {
  padding: var(--s-3);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  border: 1px solid transparent;
}
.banner--error {
  background: #FCEEEC;
  border-color: #E7C3BC;
  color: #8A3322;
}

/* --------------------------------------------------------------------- */
/* Substance panel + cards                                              */
/* --------------------------------------------------------------------- */
.panel {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.panel__empty {
  color: var(--muted);
  font-size: 0.88rem;
  padding: var(--s-4);
  border: 1px dashed var(--hairline);
  border-radius: var(--radius-sm);
  text-align: center;
  margin: 0;
}

.card {
  --card-color: var(--accent);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--card-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: var(--s-3) var(--s-4);
  transition: opacity 0.15s ease;
}
.card.is-muted { opacity: 0.55; }

.card__head {
  display: flex;
  align-items: center;
  gap: var(--s-2);
}
.card__swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--card-color);
  flex: none;
}
.card__title {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 600;
  flex: 1;
  min-width: 0;
}
.card__actions { display: flex; gap: var(--s-1); }

.icon-btn {
  border: 1px solid var(--hairline);
  background: var(--surface);
  color: var(--muted);
  font-family: var(--font-ui);
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  line-height: 1.4;
}
.icon-btn:hover { color: var(--ink); border-color: var(--accent); }
.icon-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.card__mute[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}

.card__facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-1) var(--s-4);
  margin: var(--s-3) 0;
  font-size: 0.78rem;
}
.card__facts dt {
  color: var(--muted);
  display: inline;
  margin-right: 4px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-size: 0.68rem;
}
.card__facts dd { display: inline; margin: 0; color: var(--ink); }
.card__facts dt::after { content: ""; }

/* Clean one-line subtitle (formulation · peak · half-life) — replaces the
   cramped facts grid. */
.card__sub {
  margin: 2px 0 var(--s-2);
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.4;
}

/* Brand names on the active-substance card. The card is titled with the
   generic, so this is the user's confirmation that "Vyvanse" got them the
   right row. Wraps freely here - vertical space is cheaper in the panel. */
.card__aliases {
  margin: 0 0 var(--s-2);
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.45;
}
.card__aliases-lead {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.64rem;
  opacity: 0.8;
}

/* --------------------------------------------------------------------- */
/* Dose rows                                                            */
/* --------------------------------------------------------------------- */
.doserows {
  border-top: 1px dashed var(--hairline);
  padding-top: var(--s-3);
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.doserows__head,
.doserows__row {
  display: grid;
  grid-template-columns: 1fr 1.3fr 32px;
  gap: var(--s-2);
  align-items: center;
}
.doserows__head {
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.doserows__amt,
.doserows__time {
  width: 100%;
  padding: 6px var(--s-2);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  background: var(--surface-sunk);
  color: var(--ink);
  font-size: 0.85rem;
}
.doserows__amt:focus-visible,
.doserows__time:focus-visible { border-color: var(--accent); background: var(--surface); }
.doserows__timewrap { position: relative; display: flex; align-items: center; gap: 6px; }
.doserows__hint {
  font-size: 0.7rem;
  color: var(--muted);
  flex: none;
  min-width: 34px;
}
.doserows__rm {
  font-size: 1.1rem;
  line-height: 1;
  padding: 2px 6px;
  color: var(--muted);
}
.doserows__add {
  align-self: flex-start;
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  padding: var(--s-1) 0;
}
.doserows__add:hover { text-decoration: underline; }

/* --------------------------------------------------------------------- */
/* Chart hero                                                           */
/* --------------------------------------------------------------------- */
.hero__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
}
.modetoggle {
  display: inline-flex;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  background: var(--surface);
  overflow: hidden;
}
.modetoggle__btn {
  border: none;
  background: none;
  padding: 7px var(--s-4);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
}
.modetoggle__btn + .modetoggle__btn { border-left: 1px solid var(--hairline); }
.modetoggle__btn.is-active {
  background: var(--accent);
  color: #fff;
}
.hero__status { font-size: 0.78rem; color: var(--muted); }

/* Plain-language caption under the chart (axis + dashed-threshold explainer). */
.hero__legend {
  margin: 0;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.4;
}
/* Belt-and-braces: keep the `hidden` attribute authoritative (see .empty). */
.hero__legend[hidden] { display: none; }

.hero__chartwrap {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  /* fixed height area for the chart hero; no layout shift on data changes */
  height: clamp(360px, 56vh, 620px);
  overflow: hidden;
}
.chart { position: absolute; inset: 0; }

.empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  text-align: center;
  background: var(--surface);
  pointer-events: none;
}
/* Respect the `hidden` attribute — a class selector's `display:flex` otherwise
   beats the UA `[hidden]{display:none}`, which kept this overlay covering the
   chart forever (the "graph not showing" bug). */
.empty[hidden] { display: none; }
.empty__head { margin: 0; font-size: 1.05rem; font-weight: 600; color: var(--ink); }
.empty__sub { margin: 0; color: var(--muted); font-size: 0.82rem; }

/* --------------------------------------------------------------------- */
/* Readout strip                                                        */
/* --------------------------------------------------------------------- */
.readout-region { min-height: 0; }
.readout {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: var(--s-3) var(--s-4);
}
.readout__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--s-3);
  border-bottom: 1px solid var(--hairline);
  padding-bottom: var(--s-2);
}
.readout__headlabel {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  font-weight: 600;
}
.readout__time { font-size: 0.82rem; color: var(--accent); font-weight: 500; }
.readout__list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--s-3);
}
.readout__empty { color: var(--muted); font-size: 0.85rem; margin: 0; }

.readout__row {
  --row-color: var(--accent);
  border-left: 3px solid var(--row-color);
  padding-left: var(--s-3);
}
.readout__rowtop {
  display: flex;
  align-items: center;
  gap: var(--s-2);
}
.readout__dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--row-color); flex: none;
}
.readout__name { font-weight: 600; font-size: 0.88rem; flex: 1; min-width: 0; }
.readout__cur {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
}
.readout__stats {
  display: flex;
  flex-wrap: wrap;            /* wrap instead of overflowing into the next box */
  gap: var(--s-1) var(--s-4);
  margin: var(--s-2) 0 var(--s-1);
}
.readout__stat {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  white-space: nowrap;        /* keep "PEAK 08:45" together as one unit */
}
.readout__stats dt {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  margin: 0;
}
.readout__stats dd { margin: 0; font-size: 0.82rem; }
.readout__conf { display: flex; flex-wrap: wrap; gap: var(--s-2); align-items: center; }
.readout__confbadge {
  font-size: 0.64rem;
  padding: 1px 6px;
  border-radius: 10px;
  letter-spacing: 0.02em;
  font-family: var(--font-mono);
}
.readout__confbadge--high { background: #E2F0E6; color: #2C6B41; }
.readout__confbadge--med  { background: #FBF0DC; color: #876217; }
.readout__confbadge--low  { background: #F0EEF3; color: #6A6478; }
.readout__warn {
  font-size: 0.66rem;
  color: #8A3322;
  background: #FCEEEC;
  padding: 1px 6px;
  border-radius: 10px;
}

/* --------------------------------------------------------------------- */
/* Footer                                                               */
/* --------------------------------------------------------------------- */
.app-footer {
  max-width: 1500px;
  margin: 0 auto;
  padding: var(--s-4) var(--s-5) var(--s-6);
  display: flex;
  justify-content: space-between;
  gap: var(--s-3);
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.72rem;
}

/* Source attribution — required by NLM's terms of use. Sits on its own row
   below the two status spans, quieter than them but still legible. */
.app-footer .attribution {
  flex-basis: 100%;
  max-width: 78ch;
  line-height: 1.5;
  font-size: 0.66rem;
  opacity: 0.75;
}
.app-footer .attribution a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* --------------------------------------------------------------------- */
/* Responsive — controls collapse above a full-width chart              */
/* --------------------------------------------------------------------- */
@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
    padding: var(--s-4);
    gap: var(--s-4);
  }
  .controls {
    position: static;
  }
  .hero__chartwrap {
    height: clamp(300px, 48vh, 460px);
  }
  .app-header__inner { padding: var(--s-3) var(--s-4); }
}

/* --------------------------------------------------------------------- */
/* Narrow — Chrome's side panel, and phones in portrait                  */
/* --------------------------------------------------------------------- */
/* The side panel opens around 320-400px and the user can drag it wider.
   Everything here is about giving the chart usable height in a tall, thin
   column: the header shrinks to a single line, the chart keeps a floor so the
   onset still reads as a ramp rather than a wall, and the footer attribution
   collapses to a disclosure so it stops eating half the panel. */
@media (max-width: 480px) {
  .layout {
    padding: var(--s-3);
    gap: var(--s-3);
  }
  .app-header__inner { padding: var(--s-2) var(--s-3); }
  .app-tagline { display: none; }

  .hero__chartwrap { height: clamp(240px, 38vh, 340px); }
  .hero__bar { flex-wrap: wrap; gap: var(--s-2); }

  /* Two stats per row instead of one long line that wraps mid-label. */
  .readout__stats { display: grid; grid-template-columns: 1fr 1fr; gap: 2px var(--s-3); }
  .readout__conf { flex-wrap: wrap; }

  .chiprow { gap: 4px; }
  .chip { font-size: 11px; padding: 2px 6px; }

  /* Required NLM attribution: still present, no longer dominant. */
  .app-footer .attribution {
    max-height: 3.2em;
    overflow-y: auto;
    font-size: 10px;
  }
}

/* --------------------------------------------------------------------- */
/* Reduced motion — disable transitions/animations                     */
/* --------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* ---- condition chips ------------------------------------------------------ */
/* The two assumptions the curve is drawn under, shown as their current answer
   rather than asked as a question. Clicking cycles to the next option. */
.chiprow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin: 6px 0 0;
}
.chiprow__label {
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--muted);
  margin-right: 2px;
}
.chip {
  font: inherit;
  font-size: 12px;
  line-height: 1.2;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--hairline);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color 120ms ease, border-color 120ms ease, background-color 120ms ease;
}
.chip:hover { color: var(--ink); border-color: var(--muted); }
.chip:focus-visible { outline: 2px solid var(--card-color, var(--accent)); outline-offset: 1px; }
/* A chip left on its default reads as quiet context; one the user has changed
   reads as an active setting. */
.chip.is-set {
  color: var(--ink);
  border-color: var(--card-color, var(--accent));
  background: color-mix(in srgb, var(--card-color, var(--accent)) 8%, transparent);
}
.chip--select { cursor: pointer; padding-right: 6px; }

.card__sub--dim { opacity: 0.75; font-style: italic; }

/* Shown instead of a curve for drugs where a felt-effect line would be made up. */
.card__nofelt {
  margin: 8px 0 0;
  padding: 8px 10px;
  font-size: 12px;
  line-height: 1.45;
  color: var(--muted);
  border-left: 2px solid var(--hairline);
  background: rgba(0, 0, 0, 0.02);
}

.readout__channel {
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--ink);
  padding: 1px 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--row-color, var(--accent)) 14%, transparent);
}