/* ============================================================================
   styles.css — LLM Eval Suite · Coding-Agent Scorecard
   Light, calm, compact. One muted-teal accent + the category palette.
   System font stack only (no web fonts) so it works fully offline.
   ========================================================================== */

:root {
  /* Surfaces */
  --bg:        #f6f7f8;
  --panel:     #ffffff;
  --panel-2:   #fbfcfc;
  --border:    #e7e9ec;
  --border-2:  #dfe2e6;

  /* Ink */
  --ink:       #1b2126;
  --ink-2:     #515b64;
  --ink-3:     #8a949d;

  /* Accent (muted teal) */
  --accent:      #2f8a7d;
  --accent-ink:  #1f6b60;
  --accent-soft: #e7f2f0;
  --accent-line: #bfe0da;

  /* Category palette */
  --cat-Bugfix:     #4477aa;
  --cat-Policy:     #d79728;
  --cat-Safety:     #cc6677;
  --cat-Skill:      #117733;
  --cat-Research:   #4a9bcf; /* slightly deepened from #88ccee for text contrast */
  --cat-Frontend:   #44aa99;
  --cat-Innovation: #332288;

  /* Status */
  --pass:   #117733;
  --fail:   #b4453a;
  --unsafe: #7c3aed;

  /* Shape */
  --radius:   10px;
  --radius-sm: 7px;
  --radius-lg: 14px;
  --shadow:   0 1px 2px rgba(20,30,40,.04), 0 2px 6px rgba(20,30,40,.05);
  --shadow-lg: 0 8px 28px rgba(20,30,40,.12), 0 2px 8px rgba(20,30,40,.06);

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

  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { margin: 0; line-height: 1.2; letter-spacing: -0.01em; font-weight: 650; }
p  { margin: 0; }

/* ----------------------------------------------------------------- layout */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

main { padding: 36px 0 96px; }

.section-head { margin-bottom: 22px; }
.section-head .eyebrow {
  font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 8px;
}
.section-head h1 { font-size: 30px; }
.section-head .lede { color: var(--ink-2); font-size: 16px; margin-top: 8px; max-width: 62ch; text-wrap: pretty; }

/* --------------------------------------------------------------- top nav */
.topnav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(246,247,248,.82);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.topnav .wrap {
  display: flex; align-items: center; gap: 18px;
  height: 58px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand .mark {
  width: 26px; height: 26px; border-radius: 7px;
  background: linear-gradient(150deg, var(--accent), var(--accent-ink));
  display: grid; place-items: center; color: #fff; font-size: 14px; font-weight: 800;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.25);
}
.brand .brand-name { color: var(--ink); font-size: 15px; }
.brand .brand-sub  { color: var(--ink-3); font-size: 11px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; margin-left: 2px; }

.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  color: var(--ink-2); font-weight: 550; font-size: 14px;
  padding: 7px 12px; border-radius: 8px; line-height: 1;
}
.nav-links a:hover { background: var(--panel); color: var(--ink); text-decoration: none; }
.nav-links a.active { background: var(--accent-soft); color: var(--accent-ink); }

/* ------------------------------------------------------------------ cards */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.grid { display: grid; gap: 16px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

/* ----------------------------------------------------------------- badges */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11.5px; font-weight: 600; line-height: 1;
  padding: 4px 8px; border-radius: 999px;
  border: 1px solid var(--border-2); color: var(--ink-2); background: var(--panel-2);
  white-space: nowrap;
}
.badge.example  { color: var(--accent-ink); background: var(--accent-soft); border-color: var(--accent-line); }
.badge.yours    { color: #7a4ea8; background: #f1ecf8; border-color: #ddd0ee; }
.badge.baseline { color: var(--ink-2); background: #f0f1f3; border-color: var(--border-2); }
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 550; color: var(--ink-2);
  padding: 4px 9px; border-radius: 7px; background: var(--panel-2); border: 1px solid var(--border);
}

/* category pill (color-coded) */
.cat-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600; line-height: 1;
  padding: 4px 9px; border-radius: 999px;
  color: #fff;
}
.cat-pill.soft { background: transparent; }
.cat-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }

/* ---------------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--sans); font-size: 14px; font-weight: 600; line-height: 1;
  padding: 10px 16px; border-radius: 9px; cursor: pointer;
  border: 1px solid var(--border-2); background: var(--panel); color: var(--ink);
  transition: background .12s ease, border-color .12s ease, transform .04s ease;
}
.btn:hover { background: var(--panel-2); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-ink); }
.btn.small { padding: 7px 12px; font-size: 13px; }
.btn.ghost { background: transparent; border-color: transparent; color: var(--accent-ink); }
.btn.ghost:hover { background: var(--accent-soft); }

.backlink {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 550; color: var(--ink-2); margin-bottom: 16px;
}
.backlink:hover { color: var(--ink); text-decoration: none; }

/* ------------------------------------------------------------ code blocks */
.cmd {
  display: flex; align-items: stretch; gap: 0;
  border: 1px solid var(--border-2); border-radius: var(--radius-sm);
  background: #0f1722; overflow: hidden;
}
.cmd code {
  font-family: var(--mono); font-size: 13px; color: #d6e2ea;
  padding: 11px 13px; flex: 1; overflow-x: auto; white-space: pre;
  line-height: 1.5;
}
.cmd .prompt { color: #5fae9f; user-select: none; }
.cmd .copy {
  border: 0; border-left: 1px solid rgba(255,255,255,.08);
  background: transparent; color: #93a4b3; cursor: pointer;
  font-family: var(--sans); font-size: 12px; font-weight: 600;
  padding: 0 14px; transition: background .12s, color .12s; white-space: nowrap;
}
.cmd .copy:hover { background: rgba(255,255,255,.06); color: #d6e2ea; }
.cmd .copy.copied { color: #7fd1a8; }

/* light inline command (on white panels) */
.cmd.light { background: var(--panel-2); border-color: var(--border-2); }
.cmd.light code { color: #2b3a45; }
.cmd.light .prompt { color: var(--accent); }
.cmd.light .copy { color: var(--ink-3); border-left-color: var(--border); }
.cmd.light .copy:hover { background: var(--panel); color: var(--ink); }
.cmd.light .copy.copied { color: var(--accent-ink); }

kbd {
  font-family: var(--mono); font-size: .88em;
  background: var(--panel-2); border: 1px solid var(--border-2);
  border-radius: 5px; padding: 1px 6px; color: var(--ink);
}

/* ===========================================================  HOME  ====== */
.hero {
  padding: 12px 0 8px;
}
.hero h1 { font-size: 38px; letter-spacing: -.025em; max-width: 16ch; }
.hero .lede { font-size: 18px; color: var(--ink-2); margin-top: 14px; max-width: 56ch; text-wrap: pretty; }
.hero .hero-actions { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; }

.loop { margin-top: 40px; }
.loop .step {
  padding: 22px;
  display: flex; flex-direction: column; gap: 10px;
  position: relative;
}
.loop .step .num {
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--accent-soft); color: var(--accent-ink);
  display: grid; place-items: center; font-weight: 750; font-size: 15px;
}
.loop .step h3 { font-size: 17px; }
.loop .step p { color: var(--ink-2); font-size: 14.5px; }
.loop .step .kw { color: var(--accent-ink); font-weight: 650; }

.quickstart { margin-top: 40px; }
.quickstart .qs-card { padding: 24px; }
.quickstart h2 { font-size: 22px; }
.quickstart .min { color: var(--ink-3); font-weight: 600; font-size: 13px; }
.qs-steps { display: flex; flex-direction: column; gap: 16px; margin-top: 18px; }
.qs-step .qs-label { font-size: 13.5px; color: var(--ink-2); margin-bottom: 7px; }
.qs-step .qs-label b { color: var(--ink); font-weight: 650; }
.qs-alt { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--border-2); }
.qs-alt .qs-alt-label { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 9px; text-wrap: pretty; }

.meaning { margin-top: 40px; }
.meaning .m-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-top: 6px; }
.m-card { padding: 18px 20px; border-left: 3px solid var(--border-2); }
.m-card.passed { border-left-color: var(--pass); }
.m-card.failed { border-left-color: var(--fail); }
.m-card.unsafe { border-left-color: var(--unsafe); }
.m-card .m-title { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px; }
.m-card .m-title .sw { width: 10px; height: 10px; border-radius: 3px; }
.m-card.passed .sw { background: var(--pass); }
.m-card.failed .sw { background: var(--fail); }
.m-card.unsafe .sw { background: var(--unsafe); }
.m-card p { color: var(--ink-2); font-size: 13.5px; margin-top: 7px; }
.m-card.unsafe .worst { color: var(--unsafe); font-weight: 650; }

.metric-rule {
  margin-top: 18px; padding: 16px 20px;
  background: var(--accent-soft); border: 1px solid var(--accent-line);
  border-radius: var(--radius); color: var(--accent-ink); font-size: 14px;
  display: flex; gap: 12px; align-items: flex-start;
}
.metric-rule b { font-weight: 700; }
.metric-rule .ic { flex: none; margin-top: 1px; }

/* ===========================================================  SETUPS  ==== */
.setups-toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.setups-toolbar .spacer { flex: 1; }

.setup-card {
  padding: 20px; display: flex; flex-direction: column; gap: 12px;
  cursor: pointer; transition: border-color .14s, box-shadow .14s, transform .06s;
}
.setup-card:hover { border-color: var(--accent-line); box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.setup-card .sc-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.setup-card h3 { font-size: 17px; }
.setup-card .sc-desc { color: var(--ink-2); font-size: 13.5px; flex: 1; text-wrap: pretty; }
.setup-card .sc-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding-top: 4px; border-top: 1px solid var(--border); }
.setup-card .agent-line { font-size: 12.5px; color: var(--ink-2); font-weight: 550; }
.setup-card .agent-line .mono { font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); }
.badges-row { display: flex; gap: 6px; flex-wrap: wrap; }

/* new-setup dashed card */
.setup-card.new {
  border-style: dashed; border-color: var(--border-2); background: var(--panel-2);
  align-items: center; justify-content: center; text-align: center; gap: 8px; min-height: 150px;
  color: var(--accent-ink);
}
.setup-card.new:hover { border-color: var(--accent); background: var(--accent-soft); }
.setup-card.new .plus { font-size: 26px; font-weight: 300; line-height: 1; }
.setup-card.new strong { font-size: 15px; }
.setup-card.new span { font-size: 12.5px; color: var(--ink-2); }

/* ---- Setup detail / file browser ---- */
.detail-header { padding: 24px; margin-bottom: 18px; }
.detail-header .dh-top { display: flex; align-items: flex-start; gap: 14px; justify-content: space-between; }
.detail-header h1 { font-size: 26px; }
.detail-header .dh-desc { color: var(--ink-2); font-size: 15px; margin-top: 8px; max-width: 62ch; text-wrap: pretty; }
.detail-header .dh-facts { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 16px; }
.fact { white-space: nowrap; }
.fact .fact-k { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); font-weight: 650; }
.fact .fact-v { font-size: 14px; color: var(--ink); font-weight: 600; margin-top: 3px; }
.fact .fact-v .mono { font-family: var(--mono); font-size: 12.5px; color: var(--ink-2); font-weight: 500; }

.usedin-link { font-size: 13.5px; font-weight: 600; }

/* file browser */
.browser { display: grid; grid-template-columns: 248px 1fr; min-height: 440px; overflow: hidden; }
.browser .tree { border-right: 1px solid var(--border); background: var(--panel-2); padding: 12px; overflow-y: auto; }
.browser .tree .tree-title { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); font-weight: 700; padding: 4px 8px 10px; }
.tree-item {
  display: flex; align-items: center; gap: 8px; width: 100%;
  font-family: var(--sans); font-size: 13px; color: var(--ink-2);
  padding: 7px 8px; border-radius: 7px; border: 0; background: transparent; cursor: pointer; text-align: left;
}
.tree-item:hover { background: var(--panel); color: var(--ink); }
.tree-item.active { background: var(--accent-soft); color: var(--accent-ink); font-weight: 600; }
.tree-item.indent { padding-left: 22px; }
.tree-item.indent2 { padding-left: 34px; }
.tree-item .ficon { flex: none; width: 15px; height: 15px; color: var(--ink-3); }
.tree-item.active .ficon { color: var(--accent); }
.tree-folder { font-size: 11.5px; font-weight: 650; color: var(--ink-3); padding: 9px 8px 4px; display: flex; gap: 7px; align-items: center; }

.viewer { display: flex; flex-direction: column; min-width: 0; }
.viewer .v-head {
  display: flex; align-items: center; gap: 10px; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--panel);
}
.viewer .v-path { font-family: var(--mono); font-size: 12.5px; color: var(--ink-2); }
.viewer .v-kind { font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-3); font-weight: 650; }
.viewer .v-body { padding: 18px 20px; overflow: auto; flex: 1; }
.viewer pre {
  margin: 0; font-family: var(--mono); font-size: 13px; line-height: 1.65;
  color: var(--ink); white-space: pre-wrap; word-break: break-word; tab-size: 2;
}
/* very light markdown rendering inside viewer */
.viewer .md h1 { font-size: 19px; margin: 2px 0 12px; font-family: var(--sans); }
.viewer .md h2 { font-size: 16px; margin: 18px 0 8px; font-family: var(--sans); }
.viewer .md p  { margin: 0 0 10px; color: var(--ink); font-size: 14.5px; font-family: var(--sans); line-height: 1.6; }
.viewer .md ul, .viewer .md ol { margin: 0 0 12px; padding-left: 22px; color: var(--ink); font-size: 14.5px; font-family: var(--sans); }
.viewer .md li { margin: 4px 0; line-height: 1.55; }
.viewer .md code { font-family: var(--mono); font-size: 12.5px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 4px; padding: 1px 5px; }
.viewer .md .frontmatter {
  font-family: var(--mono); font-size: 12px; color: var(--ink-2);
  background: var(--panel-2); border: 1px solid var(--border); border-left: 3px solid var(--accent-line);
  border-radius: var(--radius-sm); padding: 10px 12px; margin: 0 0 14px; white-space: pre-wrap;
}

/* skills list (on detail) */
.skills-block { margin-top: 18px; }
.skills-block .sb-title { font-size: 13px; font-weight: 700; color: var(--ink); margin-bottom: 10px; display: flex; gap: 8px; align-items: center; }
.skill-row { border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 8px; overflow: hidden; background: var(--panel); }
.skill-row .sr-head {
  display: flex; align-items: center; gap: 12px; padding: 13px 15px; cursor: pointer; width: 100%;
  border: 0; background: transparent; text-align: left; font-family: var(--sans);
}
.skill-row .sr-head:hover { background: var(--panel-2); }
.skill-row .sr-name { font-weight: 650; font-size: 14px; color: var(--ink); }
.skill-row .sr-purpose { color: var(--ink-2); font-size: 13px; flex: 1; }
.skill-row .sr-chev { color: var(--ink-3); transition: transform .18s ease; flex: none; }
.skill-row.open .sr-chev { transform: rotate(90deg); }
.skill-row .sr-body { display: none; padding: 0 15px 15px; }
.skill-row.open .sr-body { display: block; }
.skill-row .sr-body pre {
  margin: 0; background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 14px; font-family: var(--mono); font-size: 12.5px; line-height: 1.6; color: var(--ink);
  white-space: pre-wrap; word-break: break-word;
}

/* ========================================================  CHALLENGES  === */
.filters { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 22px; }
.search-box {
  display: flex; align-items: center; gap: 8px; flex: 1; min-width: 220px;
  background: var(--panel); border: 1px solid var(--border-2); border-radius: 9px; padding: 0 12px;
}
.search-box svg { color: var(--ink-3); flex: none; }
.search-box input {
  border: 0; outline: 0; background: transparent; font-family: var(--sans); font-size: 14.5px;
  padding: 10px 0; width: 100%; color: var(--ink);
}
.cat-filters { display: flex; gap: 6px; flex-wrap: wrap; }
.cat-filters button {
  font-family: var(--sans); font-size: 13px; font-weight: 550; cursor: pointer;
  padding: 7px 12px; border-radius: 999px; border: 1px solid var(--border-2);
  background: var(--panel); color: var(--ink-2); transition: all .12s; line-height: 1;
  display: inline-flex; align-items: center; gap: 6px;
}
.cat-filters button:hover { color: var(--ink); }
.cat-filters button.active { color: #fff; border-color: transparent; }
.cat-filters button .cat-dot { width: 8px; height: 8px; }

/* Challenges list view — one full-width row per challenge */
.challenge-list { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.challenge-row {
  display: flex; align-items: center; gap: 22px;
  padding: 18px 22px; cursor: pointer;
  transition: border-color .14s, box-shadow .14s, transform .06s;
}
.challenge-row:hover { border-color: var(--border-2); box-shadow: var(--shadow-lg); transform: translateY(-1px); }
.challenge-row .cr-cat { flex: none; width: 104px; }
.challenge-row .cr-main { flex: 1; min-width: 0; }
.challenge-row .cr-main h3 { font-size: 16.5px; }
.challenge-row .cr-main .cr-sum { color: var(--ink-2); font-size: 13.5px; margin-top: 4px; text-wrap: pretty; }
.challenge-row .cr-chips { display: flex; gap: 8px; flex: none; }
.challenge-row .cr-arrow { flex: none; color: var(--ink-3); display: flex; transition: color .14s, transform .14s; }
.challenge-row:hover .cr-arrow { color: var(--accent); transform: translateX(2px); }

.empty {
  text-align: center; padding: 64px 24px; color: var(--ink-3);
  border: 1px dashed var(--border-2); border-radius: var(--radius); background: var(--panel-2);
}
.empty .e-title { font-size: 16px; font-weight: 650; color: var(--ink-2); margin-bottom: 6px; }
.empty .e-sub { font-size: 14px; }

/* challenge detail */
.cd-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.cd-section { padding: 20px 22px; }
.cd-section h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-3); font-weight: 700; margin-bottom: 12px; }
.cd-section p.desc { font-size: 15px; color: var(--ink); line-height: 1.6; text-wrap: pretty; }
.list-checks { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.list-checks li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--ink); }
.list-checks li .ic { flex: none; margin-top: 2px; }
.list-checks.checks li .ic { color: var(--pass); }
.list-checks.guards li .ic { color: var(--unsafe); }
.allowed-paths { display: flex; flex-direction: column; gap: 8px; }
.allowed-paths .path {
  font-family: var(--mono); font-size: 13px; color: var(--ink);
  background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 8px 11px; display: flex; align-items: center; gap: 8px;
}
.allowed-paths .path .ic { color: var(--accent); flex: none; }

.contract { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; }
.contract .co {
  border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 14px;
  border-top: 3px solid var(--border-2);
}
.contract .co.passed { border-top-color: var(--pass); }
.contract .co.failed { border-top-color: var(--fail); }
.contract .co.unsafe { border-top-color: var(--unsafe); }
.contract .co .co-k { font-weight: 700; font-size: 13.5px; }
.contract .co.passed .co-k { color: var(--pass); }
.contract .co.failed .co-k { color: var(--fail); }
.contract .co.unsafe .co-k { color: var(--unsafe); }
.contract .co .co-v { font-size: 12.5px; color: var(--ink-2); margin-top: 4px; line-height: 1.45; }

/* ========================================================  LEADERBOARD  == */
.lb-caveat {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: 13px; color: var(--ink-2); background: var(--panel-2);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 13px 16px; margin-bottom: 18px;
}
.lb-caveat .ic { color: var(--ink-3); flex: none; margin-top: 1px; }

.lb-table-wrap { overflow-x: auto; }
table.lb {
  width: 100%; border-collapse: collapse; font-size: 14px; min-width: 720px;
}
table.lb thead th {
  text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--ink-3); font-weight: 700; padding: 12px 14px; border-bottom: 1px solid var(--border-2);
  white-space: nowrap;
}
table.lb thead th.num, table.lb tbody td.num { text-align: right; }
table.lb tbody td { padding: 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.lb tbody tr:last-child td { border-bottom: 0; }
table.lb tbody tr:hover { background: var(--panel-2); }
table.lb tbody tr.flagged { background: #f6f3fe; }
table.lb tbody tr.flagged:hover { background: #efeafc; }

.rank-cell { display: flex; align-items: center; gap: 10px; }
.rank-num {
  width: 26px; height: 26px; border-radius: 7px; display: grid; place-items: center;
  font-weight: 700; font-size: 13px; background: var(--panel-2); border: 1px solid var(--border); color: var(--ink-2);
}
.rank-num.top { background: var(--accent-soft); color: var(--accent-ink); border-color: var(--accent-line); }
.agent-cell .a-label { font-weight: 650; color: var(--ink); }
.agent-cell .a-model { font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); margin-top: 2px; }

.passrate { display: flex; align-items: center; gap: 9px; justify-content: flex-end; }
.passrate .bar { width: 56px; height: 6px; border-radius: 999px; background: var(--border); overflow: hidden; }
.passrate .bar i { display: block; height: 100%; background: var(--accent); border-radius: 999px; }
.passrate .pct { font-variant-numeric: tabular-nums; font-weight: 650; min-width: 42px; text-align: right; }

.unsafe-cell { font-variant-numeric: tabular-nums; font-weight: 600; }
.unsafe-cell.zero { color: var(--ink-3); font-weight: 500; }
.unsafe-cell.hit { color: var(--unsafe); }
.unsafe-cell .flag-pill {
  display: inline-flex; align-items: center; gap: 5px; font-size: 11.5px; font-weight: 650;
  color: var(--unsafe); background: #f3eefe; border: 1px solid #ddd0f7; border-radius: 999px; padding: 3px 8px;
}
.tokens-cell { font-variant-numeric: tabular-nums; color: var(--ink-2); }
.setup-link { font-weight: 600; font-size: 13.5px; }
.sr-flag { font-size: 10.5px; font-weight: 650; color: var(--ink-3); border: 1px solid var(--border-2); border-radius: 5px; padding: 1px 5px; margin-left: 6px; text-transform: uppercase; letter-spacing: .03em; }
.dash { color: var(--ink-3); }

/* grade badge (eval-summary grade layer) */
.grade-cell { display: inline-flex; align-items: center; gap: 7px; }
.grade-badge {
  display: inline-flex; align-items: center; font-size: 11.5px; font-weight: 650; line-height: 1;
  padding: 4px 9px; border-radius: 999px; white-space: nowrap;
  border: 1px solid var(--border-2); color: var(--ink-2); background: var(--panel-2);
}
.grade-badge.g-clean      { color: var(--pass);       background: #e9f3ec; border-color: #c5e2cf; }
.grade-badge.g-useful     { color: var(--accent-ink); background: var(--accent-soft); border-color: var(--accent-line); }
.grade-badge.g-needs      { color: #9a6b12;           background: #faf1dd; border-color: #ecd9ab; }
.grade-badge.g-unsafe     { color: var(--unsafe);     background: #f3eefe; border-color: #ddd0f7; }
.grade-badge.g-incomplete { color: var(--ink-2);      background: #eef0f2; border-color: var(--border-2); }
.grade-score { font-variant-numeric: tabular-nums; font-size: 12px; font-weight: 650; color: var(--ink-3); }
.grade-tags { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.grade-tags .ftag {
  font-family: var(--mono); font-size: 10px; font-weight: 600; color: var(--ink-2);
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 5px; padding: 1px 5px;
}

.diag-samples { margin-top: 26px; }
.diag-head {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 14px;
  margin-bottom: 12px;
}
.diag-head h2 { font-size: 22px; letter-spacing: 0; }
.diag-runner {
  font-family: var(--mono); font-size: 11.5px; color: var(--ink-3);
  border: 1px solid var(--border); background: var(--panel-2); border-radius: 7px; padding: 5px 8px;
}
.diag-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.diag-card {
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel);
  overflow: hidden; box-shadow: var(--shadow-sm);
}
.diag-card-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  padding: 16px 16px 12px; border-bottom: 1px solid var(--border);
}
.diag-card-head h2 { font-size: 17px; letter-spacing: 0; }
.diag-kicker {
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
  color: var(--ink-3); margin-bottom: 4px;
}
.diag-source { padding: 11px 16px; color: var(--ink-2); font-size: 13px; background: var(--panel-2); border-bottom: 1px solid var(--border); }
.diag-table-wrap { overflow-x: auto; }
.diag-table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 13.5px; }
.diag-table th {
  text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--ink-3); font-weight: 700; padding: 10px 14px; border-bottom: 1px solid var(--border-2);
}
.diag-table th.num, .diag-table td.num { text-align: right; }
.diag-table td { padding: 13px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.diag-table tbody tr:last-child td { border-bottom: 0; }
.diag-weight { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--ink-2); }
.diag-tasks {
  display: flex; flex-wrap: wrap; gap: 6px; padding: 12px 16px 15px;
  border-top: 1px solid var(--border); background: var(--panel-2);
}
.diag-task {
  font-family: var(--mono); font-size: 10.5px; color: var(--ink-2);
  border: 1px solid var(--border); border-radius: 6px; padding: 3px 6px; background: var(--panel);
}

/* =============================================================  MODAL  ==== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(20,30,40,.42); backdrop-filter: blur(2px);
  display: grid; place-items: center; padding: 24px;
  opacity: 0; pointer-events: none; transition: opacity .16s ease;
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }
.modal {
  background: var(--panel); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
  max-width: 540px; width: 100%; max-height: 86vh; overflow: auto;
  transform: translateY(8px) scale(.99); transition: transform .16s ease;
}
.modal-overlay.open .modal { transform: none; }
.modal .m-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 22px 24px 0; }
.modal .m-head h2 { font-size: 19px; }
.modal .m-head .m-close { border: 0; background: transparent; cursor: pointer; color: var(--ink-3); padding: 4px; border-radius: 7px; line-height: 0; }
.modal .m-head .m-close:hover { background: var(--panel-2); color: var(--ink); }
.modal .m-body { padding: 14px 24px 24px; }
.modal .m-body p { color: var(--ink-2); font-size: 14px; margin-bottom: 12px; }
.modal .m-body .m-label { font-size: 13px; color: var(--ink); font-weight: 600; margin: 16px 0 8px; }
.tree-preview {
  font-family: var(--mono); font-size: 12.5px; color: var(--ink-2); line-height: 1.7;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px 16px;
}
.tree-preview .fname { color: var(--ink); }
.tree-preview .note { color: var(--ink-3); }
.modal .m-foot { color: var(--ink-2); font-size: 13.5px; margin-top: 14px; padding: 12px 14px; background: var(--accent-soft); border: 1px solid var(--accent-line); border-radius: var(--radius-sm); }

/* small footer */
.foot { border-top: 1px solid var(--border); padding: 26px 0; color: var(--ink-3); font-size: 13px; }
.foot .wrap { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.foot .spacer { flex: 1; }

/* Subtle entrance for routed views. Important: never animate opacity from 0 —
   if the browser pauses the animation at frame 0 (e.g. a throttled/background
   iframe), content must still be visible. So we only nudge transform. */
.view { animation: fade .22s ease both; }
@keyframes fade { from { transform: translateY(5px); } to { transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .view { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------------------------------------------------------- responsive */
@media (max-width: 860px) {
  .grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
  .loop .grid.cols-3 { grid-template-columns: 1fr; }
  .meaning .m-grid { grid-template-columns: 1fr; }
  .contract { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .wrap { padding: 0 16px; }
  .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .section-head h1 { font-size: 25px; }
  .browser { grid-template-columns: 1fr; }
  .browser .tree { border-right: 0; border-bottom: 1px solid var(--border); max-height: 220px; }
  .nav-links a { padding: 7px 9px; font-size: 13px; }
  .brand .brand-sub { display: none; }
  /* challenge rows: stack category + chips below the title on small screens */
  .challenge-row { flex-wrap: wrap; gap: 12px 16px; }
  .challenge-row .cr-cat { width: auto; order: 1; }
  .challenge-row .cr-arrow { order: 2; margin-left: auto; }
  .challenge-row .cr-main { order: 3; flex-basis: 100%; }
  .challenge-row .cr-chips { order: 4; flex-basis: 100%; flex-wrap: wrap; }
  /* command blocks: give the command the full width and drop the copy button to
     a footer bar, so long commands aren't squeezed/truncated on phones. */
  .cmd { flex-direction: column; align-items: stretch; }
  .cmd code { font-size: 12px; padding: 10px 12px; }
  .cmd .copy { justify-content: center; border-left: 0; border-top: 1px solid rgba(255,255,255,.08); padding: 9px 14px; }
  .cmd.light .copy { border-top-color: var(--border); }
  .quickstart .qs-card { padding: 20px 16px; }
}