/* ==========================================================================
   Strategy Summaries — shared stylesheet
   Linear-inspired dark quant theme. Inter + JetBrains Mono.
   ========================================================================== */

:root {
  --bg: #08090a;
  --bg-deep: #010102;
  --panel: #0f1011;
  --surface: #191a1b;
  --surface-2: #28282c;
  --text: #f7f8f8;
  --text-2: #d0d6e0;
  --text-3: #8a8f98;
  --text-4: #62666d;
  --accent: #5e6ad2;
  --accent-bright: #7170ff;
  --accent-hover: #828fff;
  --green: #10b981;
  --green-bg: rgba(16, 185, 129, 0.12);
  --red: #ef4444;
  --red-bg: rgba(239, 68, 68, 0.12);
  --amber: #f59e0b;
  --amber-bg: rgba(245, 158, 11, 0.12);
  --border: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-feature-settings: 'cv01', 'ss03';
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 9, 10, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 590;
  font-size: 15px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.2px;
}
.brand svg { flex-shrink: 0; }
.brand .brand-sub { color: var(--text-4); font-weight: 400; }
.nav-links { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav-links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 14px;
  font-weight: 510;
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: var(--text); background: rgba(255, 255, 255, 0.04); }

/* ---------- Layout ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 900px; margin: 0 auto; padding: 0 24px; }

/* ---------- Hero ---------- */
.hero {
  padding: 88px 0 56px;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(94, 106, 210, 0.14), transparent 60%);
  border-bottom: 1px solid var(--border-subtle);
}
.hero h1 {
  font-size: clamp(36px, 5.5vw, 56px);
  font-weight: 510;
  letter-spacing: -1.2px;
  line-height: 1.05;
  margin-bottom: 16px;
}
.hero h1 .accent { color: var(--accent-bright); }
.hero p.lede {
  font-size: 18px;
  color: var(--text-3);
  max-width: 720px;
  line-height: 1.6;
}
.hero .meta-row { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Section headers ---------- */
section { padding: 56px 0; }
.section-label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-bright);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
h2.section-title {
  font-size: 32px;
  font-weight: 510;
  letter-spacing: -0.7px;
  margin-bottom: 12px;
}
.section-desc { color: var(--text-3); max-width: 720px; margin-bottom: 32px; font-size: 15px; }

/* ---------- Cards ---------- */
.card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}
.card-grid { display: grid; gap: 16px; }
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.card h3 { font-size: 15px; font-weight: 590; margin-bottom: 6px; letter-spacing: -0.2px; }
.card p { color: var(--text-3); font-size: 14px; }

/* ---------- Stat cards ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 22px;
}
.stat-card .stat-value {
  font-size: 28px;
  font-weight: 510;
  letter-spacing: -0.6px;
  margin-bottom: 4px;
}
.stat-card .stat-label { font-size: 12px; color: var(--text-4); font-weight: 510; text-transform: uppercase; letter-spacing: 0.06em; }
.stat-card .stat-note { font-size: 12px; color: var(--text-3); margin-top: 6px; }
.stat-card.pos .stat-value { color: var(--green); }
.stat-card.neg .stat-value { color: var(--red); }
.stat-card.neutral .stat-value { color: var(--text); }

/* ---------- Badges / pills ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 510;
  padding: 4px 10px;
  border-radius: 9999px;
  border: 1px solid var(--border);
  color: var(--text-2);
  background: rgba(255, 255, 255, 0.02);
  white-space: nowrap;
}
.badge .dot { width: 6px; height: 6px; border-radius: 50%; display: inline-block; }
.badge.green { color: var(--green); border-color: rgba(16, 185, 129, 0.35); background: var(--green-bg); }
.badge.green .dot { background: var(--green); }
.badge.red { color: var(--red); border-color: rgba(239, 68, 68, 0.35); background: var(--red-bg); }
.badge.red .dot { background: var(--red); }
.badge.amber { color: var(--amber); border-color: rgba(245, 158, 11, 0.35); background: var(--amber-bg); }
.badge.amber .dot { background: var(--amber); }
.badge.indigo { color: var(--accent-hover); border-color: rgba(113, 112, 255, 0.4); background: rgba(113, 112, 255, 0.1); }
.badge.indigo .dot { background: var(--accent-bright); }

/* ---------- Tables ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.015);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
thead th {
  text-align: left;
  font-size: 12px;
  font-weight: 510;
  color: var(--text-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
tbody td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-2);
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: rgba(255, 255, 255, 0.02); }
td.num, th.num { text-align: right; font-family: var(--mono); font-size: 13px; }
td.pos { color: var(--green); }
td.neg { color: var(--red); }
td.muted { color: var(--text-4); }
tbody tr.hl td { background: rgba(113, 112, 255, 0.06); }
tbody tr.hl td:first-child { box-shadow: inset 3px 0 0 var(--accent-bright); }

/* ---------- Verdict / callout ---------- */
.verdict {
  border: 1px solid rgba(113, 112, 255, 0.35);
  background: rgba(113, 112, 255, 0.06);
  border-radius: 12px;
  padding: 28px 32px;
  margin: 32px 0;
}
.verdict h3 { font-size: 13px; font-weight: 590; color: var(--accent-hover); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px; }
.verdict p { color: var(--text-2); font-size: 16px; line-height: 1.65; }
.verdict p + p { margin-top: 10px; }

.callout {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-bright);
  background: rgba(255, 255, 255, 0.02);
  border-radius: 8px;
  padding: 16px 20px;
  font-size: 14px;
  color: var(--text-2);
  margin: 16px 0;
}
.callout.warn { border-left-color: var(--amber); }
.callout.danger { border-left-color: var(--red); }
.callout.ok { border-left-color: var(--green); }
.callout b { color: var(--text); }

/* ---------- Lists ---------- */
ul.clean, ol.clean { list-style: none; }
ul.clean li, ol.clean li { position: relative; padding-left: 20px; margin-bottom: 8px; color: var(--text-2); font-size: 14.5px; }
ul.clean li::before { content: ''; position: absolute; left: 2px; top: 8px; width: 6px; height: 6px; border-radius: 50%; background: var(--accent-bright); opacity: 0.7; }
ol.clean { counter-reset: step; }
ol.clean li { counter-increment: step; }
ol.clean li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 18px; height: 18px; font-family: var(--mono); font-size: 11px; color: var(--accent-bright); background: rgba(113, 112, 255, 0.12); border-radius: 5px; display: flex; align-items: center; justify-content: center; padding-left: 0; }
ol.clean li::marker { content: none; }

/* ---------- Strategy cards (index) ---------- */
.strategy-card {
  display: block;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s, transform 0.2s, background 0.2s;
}
.strategy-card:hover { border-color: rgba(113, 112, 255, 0.5); background: rgba(255, 255, 255, 0.03); transform: translateY(-2px); }
.strategy-card .sc-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 14px; }
.strategy-card .sc-name { font-size: 20px; font-weight: 590; letter-spacing: -0.4px; }
.strategy-card .sc-type { font-family: var(--mono); font-size: 12px; color: var(--text-4); margin-top: 2px; }
.strategy-card .sc-desc { color: var(--text-3); font-size: 14.5px; margin-bottom: 18px; line-height: 1.6; }
.strategy-card .sc-stats { display: flex; gap: 24px; border-top: 1px solid var(--border-subtle); padding-top: 16px; }
.strategy-card .sc-stat .v { font-family: var(--mono); font-size: 16px; font-weight: 500; color: var(--text); }
.strategy-card .sc-stat .l { font-size: 11px; color: var(--text-4); text-transform: uppercase; letter-spacing: 0.06em; }
.strategy-card .sc-stats .pos .v { color: var(--green); }
.strategy-card .sc-cta { margin-top: 16px; font-size: 13px; font-weight: 510; color: var(--accent-bright); }
.strategy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 510;
  color: var(--text-2);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 16px;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }

/* ---------- Chart ---------- */
.chart-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 24px 0;
}
.chart-box canvas { width: 100% !important; }
.chart-legend { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 14px; font-size: 13px; color: var(--text-3); }
.chart-legend .item { display: flex; align-items: center; gap: 8px; }
.chart-legend .swatch { width: 14px; height: 3px; border-radius: 2px; }

/* ---------- Code ---------- */
code, pre {
  font-family: var(--mono);
  font-size: 13px;
}
pre {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  overflow-x: auto;
  color: var(--text-2);
  line-height: 1.6;
  margin: 16px 0;
}
code { background: rgba(255, 255, 255, 0.06); padding: 2px 6px; border-radius: 4px; font-size: 13px; }
pre code { background: none; padding: 0; }
pre .cmt { color: var(--text-4); }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 40px 0;
  margin-top: 40px;
  color: var(--text-4);
  font-size: 13px;
}
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer a { color: var(--text-3); text-decoration: none; }
.footer a:hover { color: var(--text); }

/* ---------- Breadcrumb ---------- */
.crumb { font-size: 13px; color: var(--text-4); margin-bottom: 24px; display: flex; gap: 8px; align-items: center; }
.crumb a { color: var(--text-3); text-decoration: none; }
.crumb a:hover { color: var(--text); }

/* ---------- References ---------- */
.ref-list { list-style: none; }
.ref-list li { padding: 10px 0; border-bottom: 1px solid var(--border-subtle); font-size: 13.5px; color: var(--text-3); }
.ref-list li:last-child { border-bottom: none; }
.ref-list .ref-authors { color: var(--text-2); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid.cols-3, .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .strategy-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .card-grid.cols-2, .card-grid.cols-3, .card-grid.cols-4 { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 40px; }
  section { padding: 40px 0; }
  .nav-links a.hide-mobile { display: none; }
}