:root {
  --paper: #eef1f4;
  --panel: #ffffff;
  --ink: #1b2430;
  --ink-2: #4a5768;
  --rule: #cbd3dc;
  --rule-soft: #e1e6ec;
  --marker: #0f7b6c;
  --marker-ink: #ffffff;
  --marker-soft: #dcefeb;
  --critical: #b42318;
  --high: #d9480f;
  --medium: #b7791f;
  --low: #3b6e8f;
  --info: #7a8794;
  --ok: #2f7d3b;
  --add: #e3f4e5;
  --del: #fbe6e4;
  --focus: #1f5fd1;
  --radius-s: 4px;
  --radius-m: 8px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12171e; --panel: #1a212b; --ink: #e4e9ef; --ink-2: #9eabba; --rule: #2e3846; --rule-soft: #242d39;
    --marker: #3fb7a5; --marker-ink: #0c1a18; --marker-soft: #18352f; --add: #17311d; --del: #3a1a17; --focus: #7aa7ff;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 15px/1.5 var(--font); color: var(--ink); background: var(--paper); font-variant-numeric: tabular-nums; }
[hidden] { display: none !important; }
a { color: var(--marker); }
h1 { font-size: 1.6rem; line-height: 1.2; margin: 0 0 .35rem; font-weight: 650; letter-spacing: -.01em; }
h2 { font-size: 1.12rem; margin: 1.8rem 0 .6rem; font-weight: 640; }
h3 { font-size: 1rem; margin: 1.2rem 0 .4rem; font-weight: 620; }
p { margin: .4rem 0; max-width: 75ch; }
.muted { color: var(--ink-2); }
.error { color: var(--critical); }
code, pre, .mono { font-family: var(--mono); font-size: .86em; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* shell */
.shell { display: grid; grid-template-columns: 236px minmax(0, 1fr); min-height: 100vh; }
.rail { background: var(--panel); border-right: 1px solid var(--rule); padding: 1.1rem .9rem; display: flex; flex-direction: column; gap: 1rem;
  position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.brand { font-weight: 700; font-size: 1.05rem; padding-left: .5rem; border-left: 4px solid var(--marker); }
.site-picker { display: grid; gap: .25rem; font-size: .82rem; color: var(--ink-2); }
#nav { display: flex; flex-direction: column; }
#nav a { color: var(--ink); text-decoration: none; padding: .38rem .55rem; border-radius: var(--radius-s); display: flex; justify-content: space-between; align-items: center; }
#nav a:hover { background: var(--rule-soft); }
#nav a.active { background: var(--marker-soft); color: var(--ink); box-shadow: inset 3px 0 0 var(--marker); font-weight: 600; }
.rail-foot { margin-top: auto; display: grid; gap: .3rem; font-size: .85rem; }
.view { padding: 1.6rem 2rem 4rem; max-width: 1280px; width: 100%; outline: none; }
.head { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.actions { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }

/* controls */
input, select, textarea { font: inherit; color: var(--ink); background: var(--panel); border: 1px solid var(--rule); border-radius: var(--radius-s);
  padding: .42rem .55rem; width: 100%; }
textarea { min-height: 7rem; font-family: var(--mono); font-size: .88rem; }
label { display: grid; gap: .25rem; font-size: .88rem; }
.btn { font: inherit; font-size: .9rem; border: 1px solid var(--rule); background: var(--panel); color: var(--ink); padding: .42rem .85rem;
  border-radius: var(--radius-s); cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--ink-2); }
.btn.primary { background: var(--marker); border-color: var(--marker); color: var(--marker-ink); font-weight: 600; }
.btn.danger { color: var(--critical); border-color: var(--critical); }
.btn.link { border: 0; background: none; color: var(--marker); padding: 0; text-align: left; }
.btn.small { padding: .2rem .55rem; font-size: .82rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: .9rem 1.2rem; }
.form-grid .wide { grid-column: 1 / -1; }
.check { display: flex; gap: .45rem; align-items: center; }
.check input { width: auto; }
.filters { display: flex; gap: .6rem; flex-wrap: wrap; margin-bottom: .8rem; }
.filters > * { width: auto; min-width: 140px; }

/* panels and tables */
.panel { background: var(--panel); border: 1px solid var(--rule); border-radius: var(--radius-m); padding: 1rem 1.1rem; }
.panel + .panel { margin-top: 1rem; }
.panel > h2:first-child, .panel > form > h2:first-child { margin-top: 0; }
.grid-2 > *, .grid-3 > * { min-width: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.table-wrap { overflow-x: auto; background: var(--panel); border: 1px solid var(--rule); border-radius: var(--radius-m); }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { text-align: left; padding: .5rem .7rem; border-bottom: 1px solid var(--rule-soft); vertical-align: top; }
th { font-weight: 600; color: var(--ink-2); background: var(--panel); position: sticky; top: 0; }
tr:last-child td { border-bottom: 0; }
td.url { max-width: 380px; word-break: break-all; }
td.num, th.num { text-align: right; }
tbody tr:hover { background: var(--rule-soft); }

/* stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0; background: var(--panel);
  border: 1px solid var(--rule); border-radius: var(--radius-m); }
.stat { padding: .9rem 1rem; border-right: 1px solid var(--rule-soft); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font-size: 1.55rem; font-weight: 650; line-height: 1.15; }
.stat span { font-size: .85rem; color: var(--ink-2); }

/* severity strata (the signature element) */
.strata { margin: 1.2rem 0 .4rem; }
.strata-bar { display: flex; height: 38px; border-radius: var(--radius-s); overflow: hidden; border: 1px solid var(--rule); background: var(--rule-soft); }
.strata-bar > div { min-width: 0; transition: flex-basis .5s ease; display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: .82rem; font-weight: 600; }
.strata-key { display: flex; gap: 1.2rem; flex-wrap: wrap; font-size: .85rem; margin-top: .45rem; }
.strata-key span::before { content: ""; display: inline-block; width: .7rem; height: .7rem; border-radius: 2px; margin-right: .35rem; vertical-align: -1px; background: currentColor; }
.s-critical { background: var(--critical); } .s-high { background: var(--high); } .s-medium { background: var(--medium); }
.s-low { background: var(--low); } .s-info { background: var(--info); }
.k-critical { color: var(--critical); } .k-high { color: var(--high); } .k-medium { color: var(--medium); } .k-low { color: var(--low); } .k-info { color: var(--info); }
@media (prefers-reduced-motion: reduce) { .strata-bar > div { transition: none; } }

.sev { display: inline-block; font-size: .78rem; font-weight: 600; padding: .05rem .45rem; border-radius: 999px; color: #fff; }
.pill { display: inline-block; font-size: .78rem; padding: .05rem .5rem; border-radius: 999px; border: 1px solid var(--rule); color: var(--ink-2); white-space: nowrap; }
.pill.ok { color: var(--ok); border-color: var(--ok); }
.pill.warn { color: var(--medium); border-color: var(--medium); }
.pill.bad { color: var(--critical); border-color: var(--critical); }
.pill.marker { color: var(--marker); border-color: var(--marker); }
.badge { background: var(--marker); color: var(--marker-ink); font-size: .74rem; border-radius: 999px; padding: 0 .45rem; font-weight: 700; }
.score { font-weight: 650; }
.unavailable { border: 1px dashed var(--rule); border-radius: var(--radius-m); padding: 1rem 1.1rem; color: var(--ink-2); background: transparent; }
.unavailable strong { color: var(--ink); }
.empty { padding: 2rem 1rem; text-align: center; color: var(--ink-2); }
.list-plain { list-style: none; padding: 0; margin: 0; }
.list-plain li { padding: .45rem 0; border-bottom: 1px solid var(--rule-soft); }
.list-plain li:last-child { border-bottom: 0; }
details summary { cursor: pointer; }
.kv { display: grid; grid-template-columns: 170px 1fr; gap: .35rem 1rem; font-size: .9rem; }
.kv dt { color: var(--ink-2); }
.kv dd { margin: 0; word-break: break-word; }

/* diff */
.diff { font-family: var(--mono); font-size: .82rem; background: var(--panel); border: 1px solid var(--rule); border-radius: var(--radius-m);
  overflow-x: auto; padding: .5rem 0; margin: .5rem 0; }
.diff div { white-space: pre; padding: 0 .9rem; }
.diff .add { background: var(--add); }
.diff .del { background: var(--del); }
.diff .hunk { color: var(--ink-2); }
pre.block { background: var(--panel); border: 1px solid var(--rule); border-radius: var(--radius-m); padding: .8rem; overflow-x: auto; white-space: pre-wrap; }

/* chat */
.chat { display: grid; grid-template-rows: 1fr auto; height: calc(100vh - 9rem); gap: .8rem; }
.chat-log { overflow-y: auto; display: flex; flex-direction: column; gap: .7rem; padding-right: .3rem; }
.msg { max-width: 78ch; padding: .65rem .85rem; border-radius: var(--radius-m); border: 1px solid var(--rule); background: var(--panel); white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: var(--marker-soft); border-color: transparent; }
.msg .meta { font-size: .76rem; color: var(--ink-2); margin-top: .35rem; }
.chat-form { display: flex; gap: .5rem; }
.chat-form input { flex: 1; }

/* onboarding keyword rows */
.kw-rows { display: grid; gap: .5rem; }
.kw-row { display: grid; grid-template-columns: 2fr 120px 2fr auto; gap: .5rem; align-items: center; }

/* toast & dialog */
.toast { position: fixed; bottom: 1.2rem; right: 1.2rem; background: var(--ink); color: var(--paper); padding: .65rem 1rem; border-radius: var(--radius-s);
  opacity: 0; transform: translateY(8px); transition: opacity .2s, transform .2s; pointer-events: none; max-width: 420px; z-index: 50; }
.toast.show { opacity: 1; transform: none; }
.toast.err { background: var(--critical); color: #fff; }
dialog { border: 1px solid var(--rule); border-radius: var(--radius-m); padding: 1.2rem; max-width: 640px; width: calc(100% - 2rem); background: var(--panel); color: var(--ink); }
dialog::backdrop { background: rgba(18, 23, 30, .45); }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.login-card { width: 100%; max-width: 380px; display: grid; gap: .9rem; background: var(--panel); border: 1px solid var(--rule); border-top: 4px solid var(--marker);
  border-radius: var(--radius-m); padding: 1.6rem; }

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .rail { position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--rule); }
  #nav { flex-direction: row; flex-wrap: wrap; gap: .2rem; }
  .view { padding: 1.1rem 1rem 3rem; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .kw-row { grid-template-columns: 1fr 1fr; }
  .kv { grid-template-columns: 1fr; }
  .chat { height: 70vh; }
}