:root {
  /* Surface */
  --bg:         #f8f9fb;
  --surface:    #ffffff;
  --surface-2:  #f3f4f6;
  --border:     #e5e7eb;

  /* Text */
  --text:       #111827;
  --muted:      #6b7280;

  /* Accent */
  --accent:     #2563eb;
  --accent-dk:  #1d4ed8;

  /* Code editor */
  --editor-bg:  #1e1e2e;
  --editor-fg:  #cdd6f4;

  /* Severity */
  --ok:         #059669;
  --violation:  #dc2626;
  --warning:    #d97706;
  --info:       #2563eb;

  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 14px/1.6 var(--sans);
  background: var(--bg);
  color: var(--text);
}

a { color: var(--accent); }
code { font-family: var(--mono); font-size: 0.88em; }

/* ── Site header ──────────────────────────────────────────────────────── */
.site-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.65rem 1.4rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.3px;
}

.header-sub {
  color: var(--muted);
  font-size: 0.8rem;
}

.header-spacer { flex: 1; }

.header-nav {
  display: flex;
  gap: 0.4rem;
}

.header-nav a {
  font-size: 0.82rem;
  color: var(--muted);
  text-decoration: none;
  padding: 0.2rem 0.5rem;
  border-radius: 5px;
}

.header-nav a:hover {
  background: var(--surface-2);
  color: var(--text);
}

/* ── Status pill ──────────────────────────────────────────────────────── */
.status-pill {
  font-size: 0.72rem;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}
.status-pill.ready { color: var(--ok); border-color: rgba(5,150,105,.35); }
.status-pill.busy  { color: var(--warning); border-color: rgba(217,119,6,.35); }

/* ── Main layout ──────────────────────────────────────────────────────── */
main { padding: 1.4rem 1.6rem 4rem; max-width: 1260px; margin: 0 auto; }

/* ── Editor panels ────────────────────────────────────────────────────── */
.editors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 860px) { .editors { grid-template-columns: 1fr; } }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.panel.drop { outline: 2px dashed var(--accent); outline-offset: -4px; }

.panel-header {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.75rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.panel-title { font-weight: 600; font-size: 0.88rem; }
.panel-meta  { color: var(--muted); font-size: 0.74rem; }
.panel-grow  { flex: 1; }

textarea {
  width: 100%;
  min-height: 16rem;
  resize: vertical;
  border: 0;
  background: var(--editor-bg);
  color: var(--editor-fg);
  font-family: var(--mono);
  font-size: 12.5px;
  padding: 0.75rem 0.85rem;
  outline: none;
  line-height: 1.55;
}

/* ── Buttons ──────────────────────────────────────────────────────────── */
button, select {
  font: inherit;
  cursor: pointer;
  border-radius: 6px;
  border: 1px solid var(--border);
  padding: 0.3rem 0.65rem;
  background: var(--surface);
  color: var(--text);
}
button:hover  { border-color: var(--accent); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-sm { padding: 0.18rem 0.55rem; font-size: 0.76rem; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover { background: var(--accent-dk); border-color: var(--accent-dk); }

.btn-secondary {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
.btn-secondary:hover { border-color: var(--accent); }

select { padding: 0.28rem 0.4rem; }

/* ── Advanced options ─────────────────────────────────────────────────── */
details.advanced {
  margin: 1rem 0 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}
details.advanced > summary {
  cursor: pointer;
  padding: 0.65rem 1rem;
  font-weight: 600;
  font-size: 0.88rem;
  user-select: none;
  color: var(--muted);
}
details.advanced[open] > summary {
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  padding: 1rem;
}
.opt label { display: block; font-weight: 600; font-size: 0.85rem; margin-bottom: 0.2rem; }
.opt-hint  { color: var(--muted); font-size: 0.74rem; margin-top: 0.2rem; }
.opt select, .opt input { width: 100%; }
.opt-check { display: flex; align-items: flex-start; gap: 0.5rem; }
.opt-check input { width: auto; margin-top: 0.25rem; }

/* ── Action bar ───────────────────────────────────────────────────────── */
.actions {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 1rem 0;
  flex-wrap: wrap;
}
.actions-grow { flex: 1; }
.timing { color: var(--muted); font-size: 0.78rem; }

/* ── Result cards ─────────────────────────────────────────────────────── */
#results:empty { display: none; }

.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-top: 1.2rem;
  overflow: hidden;
}

.banner {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.8rem 1rem;
  font-weight: 600;
  font-size: 0.92rem;
  border-bottom: 1px solid var(--border);
}
.banner.ok  { background: rgba(5,150,105,.08); }
.banner.bad { background: rgba(220,38,38,.07); }
.banner .counts { font-weight: 400; color: var(--muted); font-size: 0.83rem; }

.toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.toolbar input[type="search"] {
  flex: 1;
  min-width: 160px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 0.28rem 0.6rem;
  font: inherit;
}
.toolbar input[type="search"]:focus { outline: none; border-color: var(--accent); }

.chip {
  font-size: 0.76rem;
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.chip.active { color: var(--text); border-color: var(--accent); background: rgba(37,99,235,.08); }
.chip .dot { display: inline-block; width: 0.52rem; height: 0.52rem; border-radius: 50%; margin-right: 0.3rem; vertical-align: middle; }
.dot.violation { background: var(--violation); }
.dot.warning   { background: var(--warning); }
.dot.info      { background: var(--info); }

.violations { padding: 0.5rem 1rem 1rem; }

.violation-row {
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 8px;
  margin-top: 0.65rem;
  background: var(--surface-2);
}
.violation-row.sev-violation { border-left-color: var(--violation); }
.violation-row.sev-warning   { border-left-color: var(--warning); }
.violation-row.sev-info      { border-left-color: var(--info); }

.violation-row > summary {
  cursor: pointer;
  padding: 0.55rem 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  list-style: none;
}
.violation-row > summary::-webkit-details-marker { display: none; }

.sev-badge {
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.1rem 0.42rem;
  border-radius: 4px;
  font-weight: 700;
}
.sev-badge.violation { background: rgba(220,38,38,.12); color: var(--violation); }
.sev-badge.warning   { background: rgba(217,119,6,.12);  color: var(--warning); }
.sev-badge.info      { background: rgba(37,99,235,.1);   color: var(--info); }

.violation-row .focus { font-family: var(--mono); font-size: 0.83rem; }
.violation-row .shape { color: var(--muted); font-size: 0.78rem; margin-left: auto; }

.reasons { padding: 0 0.8rem 0.65rem 1.35rem; }
.reason {
  border-top: 1px dashed var(--border);
  padding: 0.45rem 0;
  font-size: 0.83rem;
}
.reason .msg { margin-bottom: 0.2rem; }
.reason .kv  { color: var(--muted); font-family: var(--mono); font-size: 0.76rem; }
.reason .kv b { color: var(--text); font-weight: 600; }

.empty-ok { padding: 1.2rem; color: var(--muted); font-size: 0.88rem; }

/* ── Inference stats ──────────────────────────────────────────────────── */
.stat-row { display: flex; gap: 1.4rem; padding: 1rem; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat .num { font-size: 1.4rem; font-weight: 700; }
.stat .lbl { color: var(--muted); font-size: 0.74rem; }
.stat .num.add { color: var(--ok); }

.diag {
  margin: 0 1rem 1rem;
  padding: 0.6rem 0.8rem;
  background: rgba(217,119,6,.08);
  border: 1px solid rgba(217,119,6,.3);
  border-radius: 8px;
  font-size: 0.8rem;
}

/* ── Code/report output ───────────────────────────────────────────────── */
pre.code {
  margin: 0;
  padding: 0.85rem 1rem;
  background: var(--editor-bg);
  color: var(--editor-fg);
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 12px;
  max-height: 380px;
  overflow: auto;
  white-space: pre;
}
.tabs { display: flex; gap: 0.3rem; padding: 0.6rem 1rem 0; }
.tab {
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}
.tab.active { color: var(--text); border-color: var(--border); background: var(--surface-2); }
.downloads {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
}

/* ── Cache modal ──────────────────────────────────────────────────────── */
dialog {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 12px;
  padding: 0;
  width: min(560px, 92vw);
  box-shadow: 0 8px 32px rgba(0,0,0,.12);
}
dialog::backdrop { background: rgba(0,0,0,.3); }
.modal-header {
  display: flex;
  align-items: center;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
}
.modal-header h2 { margin: 0; font-size: 0.95rem; }
.modal-body { padding: 0.6rem 1rem 1rem; max-height: 60vh; overflow: auto; }

.file-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}
.file-item .fname { font-weight: 600; font-size: 0.86rem; }
.file-item .fmeta { color: var(--muted); font-size: 0.74rem; }
.file-item .grow { flex: 1; }

.text-muted { color: var(--muted); }
.danger { color: var(--violation); border-color: rgba(220,38,38,.4); }

/* ── Toast ────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 1.2rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--surface);
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  font-size: 0.83rem;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
  z-index: 50;
}
.toast.show { opacity: 1; }