/* Level 0 web — styles.
 *
 * No external fonts, no imports, no network of any kind: one stylesheet, system
 * font stack, and colours defined as custom properties so light and dark are
 * the same rules with a different palette.
 *
 * Contrast targets: body text and all severity chip text are chosen to clear
 * WCAG AA (4.5:1) against their own backgrounds in both themes.
 */

:root {
  color-scheme: light dark;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Cascadia Mono", "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --bg: #f6f7f9;
  --bg-raised: #ffffff;
  --bg-sunken: #eceff3;
  --text: #16191d;
  --text-muted: #545c66;
  --border: #d3d8de;
  --border-strong: #b3bac3;

  --accent: #1c4fd8;
  --accent-text: #ffffff;
  --accent-soft: #e6ecfd;

  --high-bg: #fbe4e4;
  --high-text: #8f1a1a;
  --high-edge: #c04a4a;
  --medium-bg: #fbeeda;
  --medium-text: #7a4b06;
  --medium-edge: #c08a2e;
  --low-bg: #dfeefb;
  --low-text: #14507e;
  --low-edge: #4a8ec0;
  --info-bg: #e8eaed;
  --info-text: #464e57;
  --info-edge: #949ca6;

  --ok-bg: #e0f2e4;
  --ok-text: #1d5c2c;

  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 20, 26, 0.06), 0 4px 14px rgba(16, 20, 26, 0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171b;
    --bg-raised: #1c2027;
    --bg-sunken: #242932;
    --text: #e9ecf1;
    --text-muted: #a3acb8;
    --border: #333a44;
    --border-strong: #4a525e;

    --accent: #7fa6ff;
    --accent-text: #10131a;
    --accent-soft: #232d45;

    --high-bg: #3d1f21;
    --high-text: #ffb3b0;
    --high-edge: #b5544f;
    --medium-bg: #3a2e18;
    --medium-text: #f5c877;
    --medium-edge: #b28c3c;
    --low-bg: #1d2f40;
    --low-text: #9ccdf5;
    --low-edge: #4f89b5;
    --info-bg: #2a2f37;
    --info-text: #b9c1cb;
    --info-edge: #6d7681;

    --ok-bg: #1d3324;
    --ok-text: #97dba9;

    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 14px rgba(0, 0, 0, 0.3);
  }
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

.wrap { width: 100%; max-width: 60rem; margin: 0 auto; padding: 0 1.25rem; }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.5rem; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2.2vw, 2.6rem); letter-spacing: -0.02em; }
h2 { font-size: 1.35rem; letter-spacing: -0.01em; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 1rem; }
code, pre { font-family: var(--font-mono); font-size: 0.9em; }
code { background: var(--bg-sunken); padding: 0.1em 0.35em; border-radius: 4px; }
em { font-style: italic; }

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

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 10;
  background: var(--accent); color: var(--accent-text);
  padding: 0.6rem 1rem; border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ------------------------------------------------------------------ header */

.site-header {
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 0 2rem;
}
.eyebrow {
  text-transform: uppercase; letter-spacing: 0.09em; font-size: 0.75rem;
  font-weight: 600; color: var(--text-muted); margin: 0 0 0.5rem;
}
.lede { font-size: 1.075rem; color: var(--text-muted); max-width: 46rem; }

.privacy-badge {
  display: flex; gap: 0.6rem; align-items: flex-start;
  background: var(--ok-bg); color: var(--ok-text);
  border-radius: var(--radius); padding: 0.75rem 1rem;
  margin: 1.25rem 0 0; max-width: 46rem; font-size: 0.94rem;
}
.privacy-badge strong { color: inherit; }
.privacy-badge__mark { line-height: 1.5; font-size: 0.7rem; }

/* ------------------------------------------------------------------ panels */

.panel {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin: 1.75rem 0;
}
.subhead {
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--text-muted); font-weight: 600; margin: 0 0 0.5rem; padding: 0;
}

/* ------------------------------------------------------------------ input */

.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 1.75rem 1.25rem;
  text-align: center;
  background: var(--bg-sunken);
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.is-dragging { border-color: var(--accent); background: var(--accent-soft); }
.dropzone__hint { margin: 0 0 0.75rem; color: var(--text-muted); }
.dropzone__actions { display: flex; flex-wrap: wrap; gap: 0.6rem; justify-content: center; margin: 0; }
.dropzone__note { margin: 1rem 0 0; font-size: 0.85rem; color: var(--text-muted); }

/* The file input stays in the tab order and focusable; the label is the button
   you see. display:none would make it unreachable by keyboard. */
.visually-hidden-input {
  position: absolute; width: 1px; height: 1px;
  clip: rect(0 0 0 0); clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}
.visually-hidden-input:focus-visible + label {
  outline: 3px solid var(--accent); outline-offset: 2px;
}

.button {
  display: inline-block; font: inherit; font-weight: 500; line-height: 1.2;
  padding: 0.6rem 1.1rem; border-radius: var(--radius);
  border: 1px solid var(--border-strong); background: var(--bg-raised); color: var(--text);
  cursor: pointer; text-align: center;
}
.button:hover { border-color: var(--accent); }
.button--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.button--primary:hover { filter: brightness(1.08); }
.button--quiet { background: transparent; border-color: transparent; color: var(--text-muted); }
.button--quiet:hover { border-color: var(--border-strong); }
.button[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); }

.file-list { list-style: none; margin: 0 0 1rem; padding: 0; display: grid; gap: 0.4rem; }
.file-list li {
  display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: baseline;
  justify-content: space-between;
  background: var(--bg-sunken); border-radius: var(--radius); padding: 0.5rem 0.85rem;
  font-size: 0.92rem;
}
.file-list .file-name { font-family: var(--font-mono); font-weight: 600; }
.file-list .file-meta { color: var(--text-muted); font-size: 0.85rem; }
.file-list .file-error { color: var(--high-text); }

#file-list-wrap { margin-top: 1.5rem; }
.status { margin: 1rem 0 0; color: var(--text-muted); font-size: 0.92rem; min-height: 1.5rem; }
.status.is-error { color: var(--high-text); font-weight: 500; }

/* ------------------------------------------------------------------ results */

.summary { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 0 0 1.25rem; }
.stat {
  background: var(--bg-sunken); border-radius: var(--radius);
  padding: 0.7rem 1rem; min-width: 7rem; flex: 1 1 7rem;
}
.stat__value { display: block; font-size: 1.5rem; font-weight: 700; line-height: 1.1; }
.stat__label {
  display: block; font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--text-muted); margin-top: 0.2rem;
}
.stat--high .stat__value { color: var(--high-text); }
.stat--medium .stat__value { color: var(--medium-text); }
.stat--low .stat__value { color: var(--low-text); }
.stat--info .stat__value { color: var(--info-text); }

.toolbar {
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: flex-end;
  justify-content: space-between; margin-bottom: 1.25rem;
}
.filters { border: 0; margin: 0; padding: 0; }
.filters legend { padding: 0; }
.filter-row { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.filter-row .button { padding: 0.35rem 0.75rem; font-size: 0.88rem; }
.toolbar__actions { margin: 0; }

.run-detail { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 1.25rem; }
.run-detail ul { margin: 0.35rem 0 0.75rem; padding-left: 1.2rem; }

.findings { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }

.finding {
  border: 1px solid var(--border);
  border-left: 5px solid var(--info-edge);
  border-radius: var(--radius);
  background: var(--bg-raised);
  padding: 1.1rem 1.25rem;
}
.finding--high { border-left-color: var(--high-edge); }
.finding--medium { border-left-color: var(--medium-edge); }
.finding--low { border-left-color: var(--low-edge); }
.finding--info { border-left-color: var(--info-edge); }

.finding__head {
  display: flex; flex-wrap: wrap; gap: 0.5rem 0.75rem;
  align-items: center; margin-bottom: 0.6rem;
}
.chip {
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
  padding: 0.2rem 0.55rem; border-radius: 999px;
}
.chip--high { background: var(--high-bg); color: var(--high-text); }
.chip--medium { background: var(--medium-bg); color: var(--medium-text); }
.chip--low { background: var(--low-bg); color: var(--low-text); }
.chip--info { background: var(--info-bg); color: var(--info-text); }

.finding__id {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted);
  word-break: break-all;
}
.confidence { display: flex; align-items: center; gap: 0.4rem; margin-left: auto; font-size: 0.82rem; }
.confidence__track {
  width: 4.5rem; height: 6px; border-radius: 3px; background: var(--bg-sunken); overflow: hidden;
}
.confidence__fill { display: block; height: 100%; background: var(--accent); }
.confidence__value { font-variant-numeric: tabular-nums; font-weight: 600; }

.finding__issue { font-size: 1.03rem; font-weight: 600; margin: 0 0 0.75rem; }

.finding__meta { display: flex; flex-wrap: wrap; gap: 0.4rem 1.25rem; font-size: 0.88rem; margin-bottom: 0.85rem; }
.finding__meta span { color: var(--text-muted); }
.finding__meta strong { color: var(--text); font-weight: 600; }

.evidence { background: var(--bg-sunken); border-radius: var(--radius); padding: 0.75rem 0.9rem; margin: 0 0 0.9rem; }
.evidence > .subhead { margin-bottom: 0.35rem; }
.evidence ul { margin: 0; padding-left: 1.1rem; display: grid; gap: 0.2rem; }
.evidence li { font-family: var(--font-mono); font-size: 0.82rem; line-height: 1.5; overflow-wrap: anywhere; }

.finding dl { margin: 0; display: grid; gap: 0.6rem; }
.finding dt {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted); font-weight: 600;
}
.finding dd { margin: 0.1rem 0 0; }
.finding__sources { margin: 0.9rem 0 0; font-size: 0.8rem; color: var(--text-muted); overflow-wrap: anywhere; }

.empty { padding: 1.5rem; text-align: center; color: var(--text-muted); background: var(--bg-sunken); border-radius: var(--radius); }

/* ------------------------------------------------------------------ about */

.disclosure { border-top: 1px solid var(--border); padding: 0.85rem 0; }
.disclosure:first-of-type { border-top: 0; }
.disclosure > summary { cursor: pointer; font-weight: 600; padding: 0.2rem 0; }
.disclosure > summary::marker { color: var(--text-muted); }
.disclosure > *:not(summary) { margin-top: 0.75rem; }

.formula {
  background: var(--bg-sunken); border-radius: var(--radius); padding: 0.9rem 1rem;
  overflow-x: auto; font-size: 0.82rem; line-height: 1.6; margin: 0 0 1rem;
}
.verify { background: var(--accent-soft); border-radius: var(--radius); padding: 0.75rem 1rem; }
.caveat { border-left: 3px solid var(--medium-edge); padding-left: 0.9rem; color: var(--text-muted); }

.plain-list { margin: 0 0 1rem; padding-left: 1.2rem; display: grid; gap: 0.3rem; }
.plain-list code { font-weight: 600; }

.rule-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.rule-table th, .rule-table td { text-align: left; padding: 0.45rem 0.6rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.rule-table th { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); }
.rule-table code { background: none; padding: 0; }
.table-scroll { overflow-x: auto; }

/* ------------------------------------------------------------------ footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2.5rem;
  color: var(--text-muted);
  font-size: 0.88rem;
}

@media (max-width: 40rem) {
  .panel { padding: 1.1rem; }
  .confidence { margin-left: 0; }
  .toolbar { align-items: stretch; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}