/*
 * app.css — the entire stylesheet. No framework, no build step, no CDN.
 *
 * Light and dark are handled with one set of custom properties flipped by
 * prefers-color-scheme rather than two stylesheets, so a colour is defined
 * exactly once and the two themes cannot drift apart.
 *
 * Colour carries no information on its own anywhere in this UI: every state
 * that is coloured is also labelled ("in stock", "90d low", "parser dead").
 * A price monitor whose only signal for "this is a good deal" is a shade of
 * green is unusable for the ~8% of men with deuteranopia.
 */

:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #1c1f23;
  --ink-soft: #5f6368;
  --ink-faint: #8a9099;
  --line: #e2e5ea;
  --line-soft: #eef0f4;
  --accent: #2f6fed;
  --accent-ink: #ffffff;
  --ok: #0f7d43;
  --ok-bg: #e6f4ec;
  --warn: #b25000;
  --warn-bg: #fdf0e4;
  --bad: #c5221f;
  --bad-bg: #fce8e6;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .05);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171a;
    --panel: #1c2025;
    --ink: #e8eaed;
    --ink-soft: #a8aeb6;
    --ink-faint: #7d838b;
    --line: #2c3238;
    --line-soft: #23282e;
    --accent: #7aa5ff;
    --accent-ink: #0f1216;
    --ok: #6dd58c;
    --ok-bg: #16301f;
    --warn: #f0a868;
    --warn-bg: #33230f;
    --bad: #f28b82;
    --bad-bg: #351d1b;
    --shadow: none;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--bg);
}

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

h1 { font-size: 1.55rem; margin: 0 0 .2rem; letter-spacing: -.01em; }
h2 { font-size: 1.1rem; margin: 0 0 .6rem; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: var(--accent-ink); padding: .6rem 1rem; z-index: 10;
}
.skip:focus { left: 0; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* ---------------------------------------------------------------- chrome */

.topbar {
  display: flex; align-items: center; gap: 1.25rem;
  padding: .7rem 1.25rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 650; color: var(--ink); letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: .25rem; flex: 1; flex-wrap: wrap; }
.nav a {
  padding: .35rem .7rem; border-radius: var(--radius-sm);
  color: var(--ink-soft); font-size: .92rem;
}
.nav a:hover { background: var(--line-soft); text-decoration: none; }
.nav a.is-active { background: var(--line-soft); color: var(--ink); font-weight: 600; }
.who { display: flex; align-items: center; gap: .6rem; font-size: .88rem; color: var(--ink-soft); }
.who__name { max-width: 18ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.wrap { max-width: 1220px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }

.foot {
  max-width: 1220px; margin: 0 auto; padding: 0 1.25rem 2rem;
  color: var(--ink-faint); font-size: .8rem;
}
.foot .dot { margin: 0 .4rem; }

.page-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap; margin-bottom: 1.1rem;
}
.sub { margin: 0; color: var(--ink-soft); font-size: .92rem; }
.crumbs { margin: 0 0 .8rem; font-size: .9rem; }
.mt { margin-top: 1.6rem; }

/* ------------------------------------------------------------- utilities */

.mono { font-family: var(--mono); font-size: .86em; }
.muted { color: var(--ink-faint); font-size: .88em; }
.warn { color: var(--warn); font-weight: 600; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.break { overflow-wrap: anywhere; }
.inline { display: inline; }
.rule { border: 0; border-top: 1px solid var(--line); margin: 1.1rem 0; }
.hint { color: var(--ink-faint); font-size: .85rem; margin: .5rem 0 0; }

/* --------------------------------------------------------------- surfaces */

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.1rem;
}
.card--error { border-color: var(--bad); background: var(--bad-bg); }
.card__title { font-size: 1.02rem; margin: 0 0 .6rem; }
.card__head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.card__body { margin: .2rem 0 .8rem; }

.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; align-items: start; }
@media (max-width: 900px) { .cols { grid-template-columns: 1fr; } }

.empty {
  background: var(--panel); border: 1px dashed var(--line);
  border-radius: var(--radius); padding: 2.5rem 1.5rem; text-align: center;
  color: var(--ink-soft);
}
.empty--slim { padding: 1.4rem; }
.empty h2 { color: var(--ink); }
.errcode { font-size: 3rem; font-weight: 700; color: var(--ink-faint); margin: 0; line-height: 1; }

.login { max-width: 460px; margin: 2rem auto; }

/* ---------------------------------------------------------------- tables */

.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); }
.table { width: 100%; border-collapse: collapse; background: var(--panel); font-size: .9rem; }
.table th {
  text-align: left; font-size: .74rem; text-transform: uppercase;
  letter-spacing: .05em; color: var(--ink-faint); font-weight: 600;
  padding: .6rem .7rem; border-bottom: 1px solid var(--line);
  white-space: nowrap; background: var(--panel);
}
.table td { padding: .65rem .7rem; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
.table tbody tr:last-child td { border-bottom: 0; }
.table--compact td, .table--compact th { padding: .4rem .55rem; font-size: .86rem; }
.row--bad { background: var(--bad-bg); }

.wrow--paused { opacity: .62; }
.wrow__product { min-width: 260px; }
.wrow__product { display: flex; gap: .65rem; align-items: flex-start; }
.wrow__text { min-width: 0; }
.wrow__title { font-weight: 600; color: var(--ink); display: block; }
.wrow__meta { display: flex; gap: .35rem; flex-wrap: wrap; align-items: center; margin-top: .2rem; }
.wrow__flash { font-size: .8rem; color: var(--ok); margin-top: .25rem; }
.wrow__actions { white-space: nowrap; text-align: right; }
.wrow__spark { width: 140px; }

.thumb {
  width: 44px; height: 44px; object-fit: contain; border-radius: var(--radius-sm);
  background: var(--line-soft); flex: none;
}
.thumb--empty { display: inline-block; }

.price { font-weight: 650; font-variant-numeric: tabular-nums; }
.price--low { color: var(--ok); }
.target-met { color: var(--ok); font-weight: 650; }
.target-miss { font-variant-numeric: tabular-nums; }
.off { color: var(--ok); font-weight: 650; font-size: .85em; }

.spark { display: block; }
.spark--empty { opacity: .6; }

/* ----------------------------------------------------------------- chips */

.chip, .tag, .badge, .scope {
  display: inline-block; padding: .1rem .42rem; border-radius: 999px;
  font-size: .74rem; font-weight: 600; line-height: 1.5;
  border: 1px solid var(--line); color: var(--ink-soft); background: var(--line-soft);
  white-space: nowrap;
}
.chip--sm { font-size: .7rem; }
.badge--in { color: var(--ok); background: var(--ok-bg); border-color: transparent; }
.badge--out { color: var(--bad); background: var(--bad-bg); border-color: transparent; }
.badge--unknown { color: var(--ink-faint); }
.tag--ok { color: var(--ok); background: var(--ok-bg); border-color: transparent; }
.tag--low { color: var(--ok); background: var(--ok-bg); border-color: transparent; }
.tag--fail, .tag--parser_dead { color: var(--bad); background: var(--bad-bg); border-color: transparent; }
.tag--paused, .tag--pending { color: var(--warn); background: var(--warn-bg); border-color: transparent; }
.tag--target_hit, .tag--new_low { color: var(--ok); background: var(--ok-bg); border-color: transparent; }
.scope--cheapest { color: var(--accent); }

/* --------------------------------------------------------------- buttons */

.btn {
  display: inline-block; cursor: pointer; font: inherit; font-size: .88rem;
  font-weight: 600; padding: .42rem .85rem; border-radius: var(--radius-sm);
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  text-decoration: none;
}
.btn:hover { background: var(--line-soft); text-decoration: none; }
.btn:disabled, .btn.is-busy { opacity: .55; cursor: progress; }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { filter: brightness(1.07); background: var(--accent); }
.btn--ghost { background: transparent; }
.btn--danger { color: var(--bad); border-color: transparent; background: transparent; }
.btn--danger:hover { background: var(--bad-bg); }
.btn--sm { font-size: .8rem; padding: .3rem .6rem; }
.btn--lg { font-size: .95rem; padding: .55rem 1.15rem; }

.actions { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; margin-top: 1rem; }
.actions--split { justify-content: space-between; }

/* ----------------------------------------------------------------- forms */

.label {
  display: block; font-size: .8rem; font-weight: 600;
  color: var(--ink-soft); margin: .8rem 0 .25rem;
}
.input {
  width: 100%; font: inherit; font-size: .92rem; padding: .5rem .65rem;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--panel); color: var(--ink);
}
.input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.url-row { display: flex; gap: .6rem; }
.url-row .input--url { flex: 1; }
.url-form { margin-bottom: 1.1rem; }

.grid { display: grid; gap: .9rem; }
.grid--2 { grid-template-columns: 1fr 1fr; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 720px) { .grid--2, .grid--3 { grid-template-columns: 1fr; } }

.fs { border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1rem; margin: 0 0 1rem; }
.fs legend { font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-faint); padding: 0 .35rem; }

.check { display: flex; align-items: center; gap: .45rem; margin: .35rem 0; font-size: .9rem; }
.check input { margin: 0; }

.scopes { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
@media (max-width: 720px) { .scopes { grid-template-columns: 1fr; } }
.scope-opt {
  display: grid; grid-template-columns: auto 1fr; gap: .1rem .5rem;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: .6rem .7rem; cursor: pointer;
}
.scope-opt:hover { background: var(--line-soft); }
.scope-opt input { grid-row: span 2; align-self: start; margin-top: .25rem; }
.scope-opt__label { font-weight: 650; font-size: .9rem; }
.scope-opt__blurb { color: var(--ink-faint); font-size: .8rem; grid-column: 2; }
.scope-opt:has(input:checked) { border-color: var(--accent); background: var(--line-soft); }

.scope-panel { margin-top: .9rem; }
.filter-group { margin: .5rem 0; display: flex; flex-wrap: wrap; gap: .4rem 1rem; align-items: center; }
.filter-group__name { font-weight: 650; font-size: .82rem; min-width: 7ch; color: var(--ink-soft); }

/*
 * Scope panels are shown by default and hidden only where :has() works, so a
 * browser without :has() support degrades to "all fields visible" (usable)
 * rather than "the variant picker is missing" (broken).
 */
@supports selector(:has(*)) {
  .addform .scope-panel { display: none; }
  .addform:has(#scope-variant:checked) .scope-panel--variant { display: block; }
  .addform:has(#scope-filter:checked) .scope-panel--filter { display: block; }
}

.variant-picker { display: flex; gap: .6rem; align-items: flex-end; margin-bottom: .8rem; flex-wrap: wrap; }
.variant-picker .label { margin: 0; }
.variant-picker .input { width: auto; min-width: 16rem; }

.range { display: flex; gap: .2rem; }
.range a { padding: .2rem .55rem; border-radius: var(--radius-sm); font-size: .82rem; color: var(--ink-soft); }
.range a.is-active { background: var(--accent); color: var(--accent-ink); }

/* ---------------------------------------------------------------- preview */

.preview-slot { min-height: 4rem; }
.pv-head { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 1rem; }
.pv-img { width: 96px; height: 96px; object-fit: contain; border-radius: var(--radius-sm); background: var(--line-soft); flex: none; }
.pv-img--empty { display: block; }
.pv-facts { min-width: 0; }
.pv-title { font-size: 1.15rem; margin: 0 0 .3rem; }
.pv-sub { margin: 0 0 .45rem; display: flex; gap: .4rem; flex-wrap: wrap; align-items: center; font-size: .85rem; color: var(--ink-soft); }
.pv-price { margin: 0; font-size: 1.05rem; display: flex; gap: .5rem; align-items: baseline; flex-wrap: wrap; }
.pv-variants { margin-bottom: 1rem; }
.pv-variants summary { cursor: pointer; font-size: .88rem; color: var(--ink-soft); padding: .3rem 0; }

.detail-head { display: flex; gap: 1.2rem; align-items: flex-start; margin-bottom: 1.2rem; }
.detail-img { width: 120px; height: 120px; object-fit: contain; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line); flex: none; }
.detail-img--empty { display: block; }
.detail-price { margin: .5rem 0; display: flex; gap: .6rem; align-items: baseline; flex-wrap: wrap; font-size: 1.2rem; }
.detail-links { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; margin: .6rem 0 0; }
.chart { overflow-x: auto; }
.chart svg { max-width: 100%; height: auto; }

.kv { display: grid; grid-template-columns: auto 1fr; gap: .3rem .9rem; margin: .4rem 0 0; font-size: .88rem; }
.kv dt { color: var(--ink-faint); font-weight: 600; }
.kv dd { margin: 0; }

.reasons { color: var(--ink-soft); font-size: .9rem; }

/* ---------------------------------------------------------------- flashes */

.flash-region:empty { display: none; }
.flash-region { max-width: 1220px; margin: .8rem auto 0; padding: 0 1.25rem; }
.flash {
  margin: 0 0 .5rem; padding: .55rem .8rem; border-radius: var(--radius-sm);
  font-size: .88rem; background: var(--ok-bg); color: var(--ok);
}
.flash--error { background: var(--bad-bg); color: var(--bad); }
.flash--warn { background: var(--warn-bg); color: var(--warn); }
.inline-flash { font-size: .85rem; color: var(--ok); }
.inline-flash .flash { display: inline; padding: 0; background: none; }

.is-busy { opacity: .55; }

@media (prefers-reduced-motion: no-preference) {
  .btn, .nav a { transition: background-color .12s ease, filter .12s ease; }
}