/* app.css -- layout and theme for middleware-chain-visualizer. */

:root {
  --bg: #ffffff;
  --panel: #f8fafc;
  --panel-alt: #f1f5f9;
  --ink: #0f172a;
  --muted: #475569;
  --line: #cbd5e1;
  --accent: #1d4ed8;
  --accent-ink: #ffffff;
  --code-bg: #f1f5f9;
  --critical: #b91c1c;
  --high: #c2410c;
  --medium: #a16207;
  --low: #0369a1;
  --info: #475569;
  --radius: 10px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --panel: #111a2b;
    --panel-alt: #172033;
    --ink: #e2e8f0;
    --muted: #94a3b8;
    --line: #334155;
    --accent: #60a5fa;
    --accent-ink: #0b1120;
    --code-bg: #172033;
    --critical: #f87171;
    --high: #fb923c;
    --medium: #fbbf24;
    --low: #7dd3fc;
    --info: #cbd5e1;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.5rem 1rem 4rem;
}

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

h1 { font-size: 1.5rem; margin: 0 0 .25rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 .75rem; }
h3 { font-size: 1rem; margin: 0 0 .35rem; }

.lede { color: var(--muted); margin: 0 0 1.5rem; max-width: 70ch; }

code, pre, .mono {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .875em;
}

code { background: var(--code-bg); padding: .1em .35em; border-radius: 4px; }

pre {
  background: var(--code-bg);
  padding: .75rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 0;
}

/* ---------------------------------------------------------------- controls */

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: .75rem;
  margin-bottom: 1rem;
}

.field { display: flex; flex-direction: column; gap: .3rem; }
.field label { font-size: .8rem; font-weight: 600; color: var(--muted); }

select, textarea, button {
  font: inherit;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .5rem .6rem;
}

select:focus-visible, textarea:focus-visible, button:focus-visible, .mcv-node:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

textarea {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .85rem;
  line-height: 1.5;
}

.dropzone { position: relative; }
.dropzone.dragover textarea { border-color: var(--accent); border-style: dashed; }

.actions { display: flex; flex-wrap: wrap; gap: .5rem; margin: .75rem 0 0; }

button {
  cursor: pointer;
  font-weight: 600;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.status {
  margin: .75rem 0 0;
  padding: .6rem .75rem;
  border-radius: var(--radius);
  background: var(--panel-alt);
  color: var(--muted);
  font-size: .9rem;
}
.status.error { color: var(--critical); border: 1px solid var(--critical); }

/* ----------------------------------------------------------------- layout */

.split {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

@media (max-width: 860px) {
  .split { grid-template-columns: minmax(0, 1fr); }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
}

.diagram-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
}

.diagram-scroll svg { display: block; }

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

table { border-collapse: collapse; width: 100%; font-size: .875rem; }
th, td { text-align: left; padding: .4rem .5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; }
tbody tr.shadowed td { color: var(--muted); }

.table-scroll { overflow-x: auto; max-width: 100%; }

.pill {
  display: inline-block;
  padding: .05rem .4rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* ------------------------------------------------------------------- risks */

.risk { border-left: 4px solid var(--line); padding: .1rem 0 .1rem .75rem; margin: 0 0 1.25rem; }
.risk.critical { border-left-color: var(--critical); }
.risk.high { border-left-color: var(--high); }
.risk.medium { border-left-color: var(--medium); }
.risk.low { border-left-color: var(--low); }
.risk.info { border-left-color: var(--info); }

.risk .sev { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
.risk.critical .sev { color: var(--critical); }
.risk.high .sev { color: var(--high); }
.risk.medium .sev { color: var(--medium); }
.risk.low .sev { color: var(--low); }
.risk.info .sev { color: var(--info); }
.risk p { margin: .4rem 0; }
.risk .lbl { font-weight: 700; }

.details dl { margin: 0; }
.details dt { font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin-top: .6rem; }
.details dd { margin: .15rem 0 0; }

.muted { color: var(--muted); }
.small { font-size: .85rem; }

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .875rem;
}

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