/* FEBS frontend. No build step, no external resources. */

:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --bg-alt: #f3f5f8;
  --fg: #1a1d21;
  --fg-muted: #4e5660;
  --border: #c9d0d8;
  --accent: #1f5fbf;
  --accent-fg: #ffffff;
  --focus: #e67e00;
  --danger-bg: #fdecea;
  --danger-fg: #8a1c12;
  --danger-border: #e5a39b;
  --warn-bg: #fff6d6;
  --warn-fg: #5b4500;
  --ok-fg: #1b6e3a;
  --row-event: #fff2cc;
  --row-target: #dfeeff;
  --gutter: 16px;
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121417;
    --bg-alt: #1c2026;
    --fg: #e8eaed;
    --fg-muted: #a7b0ba;
    --border: #3a414a;
    --accent: #7fb0ff;
    --accent-fg: #0b1b33;
    --focus: #ffb347;
    --danger-bg: #3a1d1a;
    --danger-fg: #ffb3ab;
    --danger-border: #7a3a33;
    --warn-bg: #3a3214;
    --warn-fg: #ffe08a;
    --ok-fg: #7fd39a;
    --row-event: #3d3410;
    --row-target: #16304d;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  overflow-x: hidden;
}

a { color: var(--accent); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.95em; }

.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: var(--accent-fg); padding: 8px 12px; z-index: 10;
}
.skip:focus { left: var(--gutter); }

header.site, main, footer.site {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
header.site { padding-top: 20px; }
header.site h1 { margin: 0; font-size: 1.75rem; letter-spacing: 0.02em; }
.tagline { margin: 4px 0 16px; color: var(--fg-muted); }

footer.site {
  margin-top: 40px; padding-top: 12px; padding-bottom: 28px;
  border-top: 1px solid var(--border);
  color: var(--fg-muted); font-size: 0.9rem;
}

/* toolbar ----------------------------------------------------------------- */
.toolbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 10px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.toolbar.bottom { position: static; border: 0; justify-content: flex-end; }

button {
  font: inherit;
  min-height: 44px;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--fg);
  cursor: pointer;
}
button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); font-weight: 600; }
button.quiet { background: transparent; }
button.small { min-height: 32px; padding: 4px 10px; font-size: 0.9rem; }
button:disabled { opacity: 0.6; cursor: wait; }
button:hover:not(:disabled) { filter: brightness(1.08); }

:is(button, input, select, a):focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

/* messages ---------------------------------------------------------------- */
.alert {
  margin: 12px 0 0;
  padding: 10px 14px;
  border: 1px solid var(--danger-border);
  background: var(--danger-bg); color: var(--danger-fg);
  border-radius: var(--radius);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.alert.warn { background: var(--warn-bg); color: var(--warn-fg); border-color: var(--border); }
.alert ul { margin: 6px 0 0; padding-left: 20px; }
.banner {
  margin: 12px 0;
  padding: 10px 14px;
  border-radius: var(--radius);
  background: var(--warn-bg); color: var(--warn-fg);
  border: 1px solid var(--border);
}
.status { min-height: 1.4em; margin: 8px 0 0; color: var(--fg-muted); }
.hint { color: var(--fg-muted); font-size: 0.92rem; margin: 8px 0 16px; }
body.dragging main { outline: 3px dashed var(--accent); outline-offset: -6px; }

/* form -------------------------------------------------------------------- */
.groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}
fieldset {
  margin: 0; padding: 10px 14px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  min-width: 0;
}
legend { font-weight: 600; padding: 0 6px; }
.field { display: flex; flex-direction: column; gap: 4px; margin-top: 10px; }
.field label { font-size: 0.95rem; }
.field .unit { color: var(--fg-muted); font-size: 0.88rem; }
.field input[type="number"], .field select {
  font: inherit; font-size: 16px; /* 16px: no zoom-on-focus on iOS */
  min-height: 44px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg); color: var(--fg);
  width: 100%;
}
.field input:invalid { border-color: var(--danger-border); }
.field.check { flex-direction: row; flex-wrap: wrap; align-items: center; gap: 4px 10px; min-height: 44px; }
.field.check input { width: 22px; height: 22px; margin: 0; accent-color: var(--accent); flex: 0 0 auto; }
.field.check label { flex: 1 1 0; min-width: 0; }
.field .help { color: var(--fg-muted); font-size: 0.85rem; }
.field.check .help { flex: 1 0 100%; padding-left: 32px; }

/* results ----------------------------------------------------------------- */
.results { margin-top: 28px; }
.results h2 { font-size: 1.35rem; margin: 0 0 10px; }
.results h3 { font-size: 1.05rem; margin: 20px 0 6px; }
.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  background: var(--bg-alt);
  min-width: 0;
}
.card .k { color: var(--fg-muted); font-size: 0.85rem; }
.card .v { font-size: 1.25rem; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.card .v small { font-size: 0.8rem; color: var(--fg-muted); }
.card .sub { font-size: 0.85rem; color: var(--fg-muted); margin-top: 4px; }
.card.warn { border-color: var(--focus); }
.notes { margin-top: 10px; color: var(--fg-muted); font-size: 0.92rem; }
.notes p { margin: 4px 0; }
.run-info { color: var(--fg-muted); font-size: 0.85rem; margin-top: 12px; }
.pass { color: var(--ok-fg); font-weight: 600; }
.fail { color: var(--danger-fg); font-weight: 600; }

/* tables: horizontal scroll inside their own container ------------------- */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 100%;
}
table.traj {
  border-collapse: collapse;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  min-width: 100%;
}
table.traj th, table.traj td {
  padding: 4px 10px;
  text-align: right;
  border-bottom: 1px solid var(--border);
}
table.traj th { background: var(--bg-alt); position: sticky; top: 0; font-weight: 600; }
table.traj th:first-child, table.traj td:first-child {
  position: sticky; left: 0; background: var(--bg); z-index: 1;
  box-shadow: 1px 0 0 var(--border);
}
table.traj th:first-child { z-index: 2; background: var(--bg-alt); }
table.traj tr.event td { background: var(--row-event); }
table.traj tr.target td { background: var(--row-target); }
table.traj tr.event td:first-child, table.traj tr.target td:first-child { background: inherit; }
table.traj .tag {
  display: inline-block; margin-left: 6px; padding: 0 6px;
  border-radius: 10px; font-size: 0.75rem; font-family: inherit;
  background: var(--accent); color: var(--accent-fg);
}
.table-meta { display: flex; flex-wrap: wrap; gap: 6px 16px; color: var(--fg-muted); font-size: 0.9rem; margin: 0 0 6px; }
table.kv { border-collapse: collapse; font-size: 0.92rem; }
table.kv td { padding: 3px 12px 3px 0; font-variant-numeric: tabular-nums; }
table.kv td:not(:first-child) { text-align: right; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

@media (max-width: 480px) {
  header.site h1 { font-size: 1.5rem; }
  .toolbar button { flex: 1 1 45%; }
  .toolbar.bottom button { flex: 1 1 100%; }
}

@media print {
  .toolbar, .hint, footer.site, .skip { display: none; }
  .table-wrap { overflow: visible; border: 0; }
}