/* ==========================================================================
   Frank Ross AI Business Command Centre — Supply-Chain Control Tower theme
   Implements SupplyChain_AI_Frontend_Technical_Design §5:
   - §5.1 core color tokens (dark shell: #0B1220 / #111827 / #2D3748)
   - §5.2 typography & spacing (Inter, 4-48px scale, 10-14px radius)
   - §5.3 accessibility (focus-visible, reduced motion, status never
     colour-only — always paired with a label)
   - §4.1 persistent shell: sidebar 248px / 72px collapsed + top bar
   ========================================================================== */

:root {
  /* §5.1 core color tokens */
  --primary: #6366F1;
  --primary-dark: #4F46E5;
  --secondary: #06B6D4;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --info: #3B82F6;
  --bg: #0B1220;            /* background-dark — app shell */
  --surface: #111827;       /* surface-dark — cards, panels, sidebar */
  --surface-2: #1B2434;     /* raised / hover */
  --border: #2D3748;        /* border-dark */
  --text: #F8FAFC;          /* text-on-dark */
  --muted: #94A3B8;         /* text-muted-dark */

  /* §5.2 scale */
  --radius: 12px;
  --radius-sm: 8px;
  --sidebar-w: 248px;
  --sidebar-w-c: 72px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 14px/1.45 var(--font);
  background: var(--bg); color: var(--text);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p { margin: 0; }
a { color: var(--primary); }

/* §5.3 focus visibility */
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ---------- app shell (§4.1) ---------- */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w); flex: none;
  background: var(--surface); border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh;
  transition: width .18s ease;
}
.side-brand { display: flex; align-items: center; gap: 12px; padding: 16px 16px 12px; }
.brand-logo, .login-logo {
  width: 40px; height: 40px; flex: none; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; font-weight: 800; font-size: 17px; letter-spacing: .5px;
  display: flex; align-items: center; justify-content: center;
}
.side-brand-name { font-size: 15px; font-weight: 700; display: block; white-space: nowrap; }
.side-brand-sub { font-size: 11px; color: var(--muted); display: block; white-space: nowrap; }

.side-nav { flex: 1; overflow-y: auto; padding: 4px 10px 12px; display: flex; flex-direction: column; gap: 2px; }
.nav-group-label {
  font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .8px;
  color: var(--muted); padding: 14px 10px 4px; white-space: nowrap;
}
.tab {
  display: flex; align-items: center; gap: 10px; width: 100%;
  background: transparent; border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: 9px 10px; font: 600 13px var(--font); color: var(--muted); text-align: left;
  cursor: pointer; white-space: nowrap;
}
.tab svg { width: 17px; height: 17px; flex: none; }
.nav-num { width:25px; height:22px; flex:none; display:inline-flex; align-items:center; justify-content:center; border-radius:6px; background:rgba(99,102,241,.14); color:#A5B4FC; font:800 10px var(--font); border:1px solid rgba(99,102,241,.24); }
.nav-num.optimize { background:rgba(6,182,212,.12); color:#67E8F9; border-color:rgba(6,182,212,.25); }
.nav-num.advanced { background:rgba(168,85,247,.12); color:#D8B4FE; border-color:rgba(168,85,247,.25); }
.nav-num.control { background:rgba(16,185,129,.12); color:#6EE7B7; border-color:rgba(16,185,129,.25); }
.nav-num.overview { background:rgba(148,163,184,.12); color:var(--text); border-color:var(--border); }
.tab:hover { background: var(--surface-2); color: var(--text); }
.tab.active { background: rgba(99,102,241,.16); color: #A5B4FC; border-color: rgba(99,102,241,.35); }

.side-foot { padding: 12px; border-top: 1px solid var(--border); }
.user-chip {
  display: inline-block; font-size: 12px; color: var(--text);
  background: var(--surface-2); border: 1px solid var(--border);
  padding: 5px 11px; border-radius: 20px; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis; max-width: 100%;
}

/* collapsed state (§4.1: 72-80px) */
body.nav-collapsed .sidebar { width: var(--sidebar-w-c); }
body.nav-collapsed .side-brand { justify-content: center; padding: 16px 8px 12px; }
body.nav-collapsed .side-brand-text,
body.nav-collapsed .nav-group-label,
body.nav-collapsed .tab .nav-label { display: none; }
body.nav-collapsed .tab { justify-content: center; padding: 10px; }
body.nav-collapsed .side-foot { display: flex; justify-content: center; padding: 12px 6px; }
body.nav-collapsed .user-chip { font-size: 0; padding: 8px; border-radius: 50%; max-width: 34px; }
body.nav-collapsed .user-chip::first-letter { font-size: 12px; font-weight: 700; }

/* ---------- main column ---------- */
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

/* ---------- top bar (§4.1) ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: rgba(11,18,32,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1440px; margin: 0 auto; padding: 10px 18px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 10px; min-width: 0; }
.stamp { font-size: 12px; color: var(--muted); white-space: nowrap; }
.search-wrap { position: relative; min-width: 230px; }
.search-wrap input {
  width: 100%; padding: 8px 12px 8px 34px;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font: 13px var(--font);
}
.search-wrap input::placeholder { color: var(--muted); }
.search-wrap::before {
  content: ""; position: absolute; left: 11px; top: 50%; width: 13px; height: 13px;
  transform: translateY(-50%); border: 1.6px solid var(--muted); border-radius: 50%;
}
.search-wrap::after {
  content: ""; position: absolute; left: 21px; top: calc(50% + 5px); width: 6px; height: 1.6px;
  background: var(--muted); transform: rotate(45deg);
}

.icon-btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  background: var(--surface); color: var(--muted);
  border: 1px solid var(--border); cursor: pointer;
}
.icon-btn:hover { color: var(--text); border-color: var(--primary); }
.icon-btn svg { width: 17px; height: 17px; }
.notif-badge {
  position: absolute; top: -5px; right: -5px; min-width: 17px; height: 17px; padding: 0 4px;
  background: var(--danger); color: #fff; font-size: 10.5px; font-weight: 700;
  border-radius: 10px; display: inline-flex; align-items: center; justify-content: center;
}

/* ---------- buttons (§5.2: 36-40px standard) ---------- */
.btn {
  border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: 9px 16px; font: 600 13px var(--font); cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
}
.btn-primary { background: var(--primary-dark); color: #fff; }
.btn-primary:hover { background: var(--primary); }
.btn-primary:disabled { opacity: .6; cursor: wait; }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: #fff; }
.btn-ok { background: rgba(16,185,129,.16); color: #34D399; }
.btn-ok:hover { background: rgba(16,185,129,.28); }
.btn-danger { background: rgba(239,68,68,.16); color: #F87171; }
.btn-danger:hover { background: rgba(239,68,68,.28); }

/* ---------- content ---------- */
.content { flex: 1; max-width: 1440px; width: 100%; margin: 0 auto; padding: 20px 22px 34px; }
.view { display: none; }
.view.active { display: block; }
.view-title { font-size: 22px; font-weight: 700; margin: 2px 0 14px; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.coverage { font-size: 12.5px; font-weight: 500; color: var(--muted); }
.eyebrow { color: #A5B4FC; font-size: 10.5px; font-weight: 800; letter-spacing: 1.1px; text-transform: uppercase; }
.page-heading { display:flex; align-items:flex-start; justify-content:space-between; gap:20px; margin-bottom:18px; }
.page-heading .view-title { margin:4px 0 3px; font-size:28px; }
.page-lead { color:var(--muted); max-width:720px; }
.summary-pill { padding:8px 12px; border:1px solid rgba(99,102,241,.38); color:#C7D2FE; background:rgba(99,102,241,.12); border-radius:20px; font-size:12px; white-space:nowrap; }
.stamp-inline { font-size: 12px; color: var(--muted); }
.filter-row { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; flex-wrap: wrap; }
.filter-row label { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.filter-row select {
  padding: 7px 10px; background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-sm); font: 13px var(--font);
}

/* ---------- compact decision charts ---------- */
.insight-chart { margin:0 0 14px; }
.chart-shell { background:linear-gradient(145deg,rgba(99,102,241,.055),transparent),var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:14px 16px; margin-bottom:12px; }
.chart-title { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:11px; }.chart-title b { font-size:13px; }.chart-title span { color:var(--muted); font-size:10.5px; text-transform:uppercase; letter-spacing:.5px; }
.rank-chart { display:grid; gap:8px; }.rank-row { display:grid; grid-template-columns:minmax(130px,1.2fr) minmax(120px,3fr) minmax(75px,auto); gap:10px; align-items:center; font-size:11.5px; }
.rank-label { overflow:hidden; white-space:nowrap; text-overflow:ellipsis; color:var(--muted); }.rank-row>b { text-align:right; font-size:11.5px; }
.rank-track { height:8px; background:rgba(148,163,184,.12); border-radius:8px; overflow:hidden; }.rank-track i { display:block; height:100%; border-radius:8px; background:linear-gradient(90deg,var(--primary-dark),#818CF8); }.rank-track i.tone-cyan { background:linear-gradient(90deg,#0891B2,#22D3EE); }.rank-track i.tone-red { background:linear-gradient(90deg,#DC2626,#FB7185); }.rank-track i.tone-amber { background:linear-gradient(90deg,#D97706,#FBBF24); }.rank-track i.tone-green { background:linear-gradient(90deg,#059669,#34D399); }
.mix-body { display:flex; align-items:center; gap:24px; }.donut { width:105px; height:105px; flex:none; border-radius:50%; display:grid; place-items:center; position:relative; }.donut::after { content:""; position:absolute; inset:16px; border-radius:50%; background:var(--surface); }.donut span { position:relative; z-index:1; font-size:20px; font-weight:800; }.legend { display:grid; grid-template-columns:repeat(2,minmax(120px,1fr)); gap:8px 18px; flex:1; }.legend span { display:grid; grid-template-columns:8px 1fr auto; gap:7px; align-items:center; color:var(--muted); font-size:11.5px; }.legend i { width:8px;height:8px;border-radius:2px; }.legend b { color:var(--text); }
.chart-empty { color:var(--muted); background:var(--surface); border:1px dashed var(--border); border-radius:var(--radius); padding:14px; margin-bottom:12px; font-size:12px; text-align:center; }
.loading-state { min-height:76px; display:flex; align-items:center; justify-content:center; gap:9px; color:var(--muted); background:var(--surface); border:1px dashed var(--border); border-radius:var(--radius); font-size:12.5px; }

/* ---------- KPI cards (§4.2 — click drills into the related view) ---------- */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin-bottom: 18px; }
.kpi {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; display: flex; flex-direction: column; gap: 4px; text-align: left;
  font-family: inherit; color: inherit; cursor: pointer; transition: border-color .15s ease;
}
.kpi:hover { border-color: var(--primary); }
.kpi.static { cursor:default; }
.kpi.static:hover { border-color:var(--border); }
.kpi:disabled { opacity:.82; cursor:default; }.kpi:disabled:hover { border-color:var(--border); }.kpi-hint.fixed { opacity:1; color:var(--muted); }
.kpi-label { font-size: 11.5px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; }
.kpi-value { font-size: 21px; font-weight: 800; }
.kpi-sub { font-size: 11.5px; color: var(--muted); }
.kpi-hint { font-size: 10.5px; color: var(--primary); margin-top: 2px; opacity: 0; transition: opacity .15s ease; }
.kpi:hover .kpi-hint, .kpi:focus-visible .kpi-hint { opacity: 1; }
.tone-green { color: #34D399; } .tone-red { color: #F87171; }
.tone-amber { color: #FBBF24; } .tone-grey { color: var(--muted); }

/* ---------- statements (AI insights in context, §2) ---------- */
.statements { display: flex; flex-direction: column; gap: 10px; }
.statement {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; border-left: 3px solid var(--primary);
}
.statement p { margin: 8px 0 0; }
.statement .tag { float: left; margin-right: 10px; }
.statement .evidence { margin-top: 10px; clear: both; }

/* ---------- tags / badges / chips (§5.3: status has a label, never colour-only) ---------- */
.tag { display: inline-block; font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 20px; letter-spacing: .3px; text-transform: uppercase; }
.tag-fact { background: rgba(59,130,246,.16); color: #60A5FA; }
.tag-forecast { background: rgba(99,102,241,.18); color: #A5B4FC; }
.tag-rec { background: rgba(16,185,129,.16); color: #34D399; }
.badge { display: inline-block; font-size: 11px; font-weight: 700; padding: 2px 9px; border-radius: 20px; text-transform: capitalize; }
.badge-red { background: rgba(239,68,68,.16); color: #F87171; }
.badge-amber { background: rgba(245,158,11,.16); color: #FBBF24; }
.badge-green { background: rgba(16,185,129,.16); color: #34D399; }
.badge-grey { background: rgba(148,163,184,.18); color: #94A3B8; }
.evidence { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { background: var(--surface-2); border: 1px solid var(--border); border-radius: 7px; padding: 4px 10px; font-size: 12px; color: var(--text); }
.chip b { font-weight: 700; margin-right: 4px; color: var(--muted); }
.chip-btn {
  background: var(--surface); color: #A5B4FC; border: 1px solid var(--border);
  border-radius: 20px; padding: 7px 13px; font: 600 12.5px var(--font); cursor: pointer;
}
.chip-btn:hover { border-color: var(--primary); color: #fff; }

/* ---------- tables (§4.2 large operational tables) ---------- */
.table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: auto; }
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th {
  text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: .6px;
  color: var(--muted); background: var(--surface-2);
  padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; position: sticky; top: 0;
}
.tbl td { padding: 9px 12px; border-bottom: 1px solid rgba(45,55,72,.55); vertical-align: top; }
.tbl tr:last-child td { border-bottom: none; }
.tbl tr:hover td { background: rgba(255,255,255,.03); }
.table-pager { display:flex; align-items:center; justify-content:space-between; gap:12px; padding:10px 2px 14px; color:var(--muted); font-size:11.5px; }
.table-pager>div { display:flex; flex-wrap:wrap; gap:4px; justify-content:flex-end; }.table-pager button { min-width:30px; height:30px; padding:0 8px; color:var(--muted); background:var(--surface); border:1px solid var(--border); border-radius:6px; font:600 11px var(--font); cursor:pointer; }.table-pager button:hover,.table-pager button.active { color:#fff; border-color:var(--primary); background:rgba(99,102,241,.18); }.table-pager button:disabled { opacity:.35; cursor:not-allowed; }
.muted { color: var(--muted); font-size: 12px; }

/* ---------- cards (anomalies / actions) ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 12px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; display: flex; flex-direction: column; gap: 8px;
}
.card-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.card-type { font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); }
.card h3 { font-size: 14.5px; }
.card p { margin: 0; font-size: 13px; }
.card .impact { color: var(--muted); font-size: 12.5px; }
.card-actions { display: flex; gap: 8px; margin-top: 4px; }

/* ---------- AI capability showcase ---------- */
.phase-legend { display:flex; flex-wrap:wrap; gap:16px; margin:0 0 14px; color:var(--muted); font-size:11.5px; }
.phase-legend span { display:flex; align-items:center; gap:6px; }
.phase-dot { width:7px; height:7px; border-radius:50%; display:inline-block; }
.phase-dot.core { background:var(--primary); }.phase-dot.optimize { background:var(--secondary); }.phase-dot.advanced { background:#A855F7; }.phase-dot.control { background:var(--success); }
.showcase-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(270px,1fr)); gap:12px; }
.showcase-card { position:relative; overflow:hidden; min-height:190px; background:linear-gradient(145deg,rgba(255,255,255,.025),transparent),var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:16px; display:flex; flex-direction:column; gap:9px; }
.showcase-card::before { content:""; position:absolute; inset:0 auto 0 0; width:3px; background:var(--primary); }
.showcase-card.phase-optimize::before { background:var(--secondary); }.showcase-card.phase-advanced::before { background:#A855F7; }.showcase-card.phase-controls::before { background:var(--success); }
.showcase-card:hover { border-color:#475569; transform:translateY(-1px); }
.showcase-top,.showcase-foot,.detail-head,.report-head { display:flex; align-items:center; justify-content:space-between; gap:10px; }
.ai-number { color:#A5B4FC; background:rgba(99,102,241,.14); border:1px solid rgba(99,102,241,.3); padding:3px 8px; border-radius:6px; font-size:10.5px; font-weight:800; letter-spacing:.5px; white-space:nowrap; }
.live-state { color:#6EE7B7; font-size:10.5px; font-weight:700; display:flex; align-items:center; gap:5px; text-transform:uppercase; letter-spacing:.5px; }
.live-state i { width:6px; height:6px; background:var(--success); border-radius:50%; box-shadow:0 0 0 3px rgba(16,185,129,.12); }
.model-kind { color:var(--muted); font-size:9.5px; font-weight:800; letter-spacing:.45px; text-transform:uppercase; }.model-kind.trained { color:#6EE7B7; }.model-status { display:inline-flex; }
.showcase-card h3,.control-card h3 { font-size:15px; margin-top:2px; }.showcase-card p,.control-card>p { color:var(--muted); font-size:12.5px; flex:1; }
.showcase-foot { border-top:1px solid rgba(45,55,72,.7); padding-top:10px; margin-top:auto; color:var(--muted); font-size:11px; }
.text-btn { border:0; padding:0; background:none; color:#A5B4FC; font:700 11.5px var(--font); cursor:pointer; }.text-btn:hover { color:#fff; }
.detail-panel { scroll-margin-top:80px; margin-top:18px; padding:18px; background:var(--surface); border:1px solid rgba(99,102,241,.45); border-radius:var(--radius); box-shadow:0 18px 50px rgba(0,0,0,.25); }
.detail-head { align-items:flex-start; margin-bottom:14px; }.detail-head>div { display:grid; grid-template-columns:auto 1fr; align-items:center; gap:5px 10px; }.detail-head p { grid-column:1/-1; }.detail-head h3 { font-size:19px; }
.control-grid { display:grid; gap:16px; }.control-card { scroll-margin-top:82px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:16px; display:grid; gap:9px; }.control-card:target,.control-card.focused { border-color:var(--primary); }.control-preview .table-wrap { max-height:330px; }.control-preview .empty { padding:18px; }
.governance-note { display:flex; gap:12px; align-items:flex-start; margin-top:16px; padding:13px 15px; border:1px solid rgba(245,158,11,.28); background:rgba(245,158,11,.08); border-radius:var(--radius); color:var(--muted); font-size:12px; }.governance-note b { color:#FBBF24; white-space:nowrap; }
.model-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(330px,1fr)); gap:14px; }.model-card { background:linear-gradient(145deg,rgba(16,185,129,.06),transparent),var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:17px; display:grid; gap:10px; }.model-card h3 { font-size:16px; }.model-card>p { color:var(--muted); font-size:12px; }.metric-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:8px; }.metric-grid>div { padding:10px; background:rgba(11,18,32,.55); border:1px solid var(--border); border-radius:8px; display:grid; gap:3px; }.metric-grid span,.model-foot { color:var(--muted); font-size:10.5px; }.metric-grid b { font-size:14px; }.model-foot { display:flex; justify-content:space-between; gap:10px; border-top:1px solid var(--border); padding-top:9px; }

/* ---------- natural-language report builder ---------- */
.report-intro { display:flex; justify-content:space-between; align-items:center; gap:16px; background:linear-gradient(135deg,rgba(99,102,241,.16),rgba(6,182,212,.08)); border:1px solid rgba(99,102,241,.32); border-radius:var(--radius); padding:18px; margin:12px 0; }
.report-intro p { color:var(--muted); margin-top:4px; }.report-output { margin-top:16px; }
.report-loading,.generated-report { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:18px; }
.report-loading { display:flex; align-items:center; gap:9px; color:var(--muted); }
.thinking { display:inline-flex; gap:3px; }.thinking i { width:5px;height:5px;border-radius:50%;background:var(--primary);animation:think 1.1s infinite ease-in-out}.thinking i:nth-child(2){animation-delay:.15s}.thinking i:nth-child(3){animation-delay:.3s}@keyframes think{0%,70%,100%{opacity:.2;transform:translateY(0)}35%{opacity:1;transform:translateY(-3px)}}
.generated-report { border-color:rgba(99,102,241,.38); }.report-copy { margin:15px 0; line-height:1.7; font-size:14px; }.generated-report .evidence { margin-top:14px; }

/* ---------- copilot (§3 AI Copilot) ---------- */
.chat {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; min-height: 260px; max-height: 480px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 10px;
}
.msg { max-width: 85%; padding: 10px 13px; border-radius: 12px; font-size: 13.5px; }
.msg b { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: .5px; color: var(--muted); margin-bottom: 4px; }
.msg p { margin: 0; }
.msg.ai { background: rgba(99,102,241,.12); border: 1px solid rgba(99,102,241,.3); align-self: flex-start; }
.msg.user { background: var(--primary-dark); color: #fff; align-self: flex-end; }
.msg.user b { color: rgba(255,255,255,.8); }
.msg-answer { margin-bottom: 6px; }
.msg-stmt { margin: 6px 0; }
.msg-stmt .tag { margin-right: 6px; }
.chat .evidence { margin-top: 6px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
.chat-input-row { display: flex; gap: 8px; }
.chat-input-row input {
  flex: 1; padding: 11px 13px; background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-sm); font: 14px var(--font);
}
.chat-input-row input::placeholder { color: var(--muted); }

/* ---------- misc ---------- */
.empty { background: var(--surface); border: 1px dashed var(--border); border-radius: var(--radius); padding: 26px; text-align: center; color: var(--muted); font-size: 13.5px; }
.error-box { background: rgba(239,68,68,.14); color: #F87171; border: 1px solid rgba(239,68,68,.4); border-radius: var(--radius-sm); padding: 10px 12px; font-size: 13px; }
.notice { font-size: 12.5px; color: var(--muted); margin: 0 0 10px; }
.foot { max-width: 1440px; width: 100%; margin: 0 auto; padding: 0 22px 28px; }
.foot p { font-size: 12px; color: var(--muted); border-top: 1px solid var(--border); padding-top: 12px; }

/* ---------- login ---------- */
.login-body {
  display: flex; align-items: center; justify-content: center; min-height: 100vh;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(99,102,241,.25), transparent), var(--bg);
}
.login-card {
  width: 380px; max-width: 92vw; background: var(--surface);
  border: 1px solid var(--border); border-radius: 14px; padding: 32px 30px;
  box-shadow: 0 24px 60px rgba(0,0,0,.5);
}
.login-brand { display: flex; gap: 12px; align-items: center; margin-bottom: 22px; }
.login-brand h1 { font-size: 22px; }
.login-sub { margin: 2px 0 0; color: var(--muted); font-size: 12.5px; }
.field { display: block; margin-bottom: 14px; }
.field span { display: block; font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 5px; }
.field input {
  width: 100%; padding: 10px 12px; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-sm); font: 14px var(--font);
}
.field input:focus { outline: 2px solid var(--primary); border-color: transparent; }
.login-error { background: rgba(239,68,68,.14); color: #F87171; border: 1px solid rgba(239,68,68,.4); padding: 8px 10px; border-radius: var(--radius-sm); margin-bottom: 12px; font-size: 13px; }
.login-foot { margin: 18px 0 0; font-size: 11.5px; color: var(--muted); text-align: center; }
.btn-block { width: 100%; justify-content: center; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .search-wrap { min-width: 150px; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .sidebar {
    position: fixed; left: 0; top: 0; z-index: 40; transform: translateX(-100%);
    transition: transform .18s ease; box-shadow: 0 0 40px rgba(0,0,0,.5);
  }
  body.nav-open .sidebar { transform: none; }
  .content { padding: 16px 14px 26px; }
  .stamp { display: none; }
  .card-grid { grid-template-columns: 1fr; }
  .showcase-grid { grid-template-columns:1fr; }
  .page-heading,.report-intro { align-items:flex-start; flex-direction:column; }
  .summary-pill { white-space:normal; }
  .model-grid { grid-template-columns:1fr; }.metric-grid { grid-template-columns:repeat(2,1fr); }
  .table-pager { align-items:flex-start; flex-direction:column; }.table-pager>div { justify-content:flex-start; }
  .rank-row { grid-template-columns:minmax(90px,1fr) minmax(80px,1.5fr); }.rank-row>b { grid-column:2; font-size:10.5px; }.mix-body { align-items:flex-start; }.legend { grid-template-columns:1fr; }
  .topbar-inner { padding: 8px 12px; }
}