/* model.css — page-specific styles for the Methodology page.
   Loaded BEFORE style.css + index.css (cascade preserved from the former inline block). */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { background: #0b0f1a; color: #e2e8f0; font-family: 'Inter', sans-serif; font-size: 13px; line-height: 1.5; }
.wrap { max-width: 1100px; width: 100%; margin: 0 auto; padding: 30px 28px 44px; }

/* ── HEADER ── */
.hdr { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; padding-bottom: 20px; border-bottom: 1px solid rgba(99,102,241,0.18); position: relative; }
.hdr::before { content: ''; position: absolute; bottom: -1px; left: 0; width: 100px; height: 1px; background: linear-gradient(90deg, #6366f1, transparent); }
.brand-row { display: flex; align-items: center; gap: 14px; }
.brand-icon { width: 46px; height: 46px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.brand-name { font-family: var(--font-display); font-size: 22px; letter-spacing: 0.06em; color: #f1f5f9; }
.brand-fair { font-weight: 400; color: #74849a; }
.brand-bold { font-weight: 800; color: #f1f5f9; }
.brand-name em { color: #818cf8; font-style: normal; font-weight: 700; }
.brand-sub { font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--text-4); margin-top: 2px; }
.hdr-pills { display: flex; gap: 7px; flex-wrap: wrap; justify-content: flex-end; }
.hdr-pill { padding: 4px 10px; border-radius: 5px; font-size: 9.5px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; border: 1px solid; }
.p-ind { background: rgba(99,102,241,0.1); border-color: rgba(99,102,241,0.3); color: #a5b4fc; }
.p-tea { background: rgba(20,184,166,0.1); border-color: rgba(20,184,166,0.3); color: #5eead4; }
.p-vio { background: rgba(139,92,246,0.1); border-color: rgba(139,92,246,0.3); color: #c4b5fd; }
.p-sla { background: rgba(148,163,184,0.07); border-color: rgba(148,163,184,0.15); color: #94a3b8; }

/* ── MODEL SIGNATURE BAR ── */
.msig { display: flex; background: rgba(255,255,255,0.018); border: 1px solid rgba(99,102,241,0.12); border-radius: 10px; overflow: hidden; margin-bottom: 22px; }
.msig-cell { flex: 1; padding: 11px 13px; border-right: 1px solid rgba(255,255,255,0.04); }
.msig-cell:last-child { border-right: none; }
.msig-lbl { font-size: 8.5px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-4); margin-bottom: 4px; }
.msig-val { font-family: var(--font-display); font-size: 13px; font-weight: 600; color: #c7d2fe; letter-spacing: 0.04em; line-height: 1.15; }
.msig-sub { font-size: 8.5px; color: var(--text-4); margin-top: 2px; line-height: 1.3; }

/* ── SECTION ── */
.section { margin-bottom: 24px; }
.sec-lbl { font-size: 8.5px; font-weight: 700; letter-spacing: 0.24em; text-transform: uppercase; color: var(--text-4); margin-top: 0; margin-bottom: 11px; display: flex; align-items: center; gap: 10px; }
.sec-lbl::after { content: ''; flex: 1; height: 1px; background: rgba(255,255,255,0.04); }

/* ── PIPELINE ── */
.pipeline { display: flex; align-items: stretch; background: rgba(255,255,255,0.018); border: 1px solid rgba(99,102,241,0.12); border-radius: 12px; overflow: hidden; }
.pipe-stage { flex: 1; display: flex; flex-direction: column; padding: 11px 7px; border-right: 1px solid rgba(255,255,255,0.04); }
.pipe-stage:last-child { border-right: none; }
.pipe-top { display: flex; flex-direction: column; align-items: center; gap: 3px; text-align: center; padding-bottom: 8px; border-bottom: 1px solid rgba(255,255,255,0.04); margin-bottom: 8px; }
.pipe-num { font-family: var(--font-mono); font-size: 8px; font-weight: 600; color: #4f46e5; }
.pipe-glyph { font-size: 17px; line-height: 1; }
.pipe-name { font-family: var(--font-display); font-size: 9px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: #cbd5e1; line-height: 1.2; }
.pipe-io { flex: 1; display: flex; flex-direction: column; gap: 5px; }
.pio-row { display: flex; gap: 4px; align-items: flex-start; }
.pio-lbl { font-family: var(--font-mono); font-size: 8px; font-weight: 700; padding: 1px 3px; border-radius: 2px; flex-shrink: 0; margin-top: 1px; line-height: 1.3; }
.pio-in  { background: rgba(148,163,184,0.1); color: #64748b; }
.pio-out { background: rgba(99,102,241,0.12); color: #818cf8; }
.pio-text { font-size: 8.5px; color: var(--text-3); line-height: 1.35; }

/* ── MATH GRID ── */
.math-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; }
.math-block { background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.055); border-radius: 10px; padding: 15px; border-left: 2px solid; }
.math-block.ci { border-left-color: #6366f1; }
.math-block.cv { border-left-color: #8b5cf6; }
.math-block.ct { border-left-color: #14b8a6; }
.math-block.cs { border-left-color: #0ea5e9; }
.math-block.ca { border-left-color: #f59e0b; }
.math-block.ce { border-left-color: #10b981; }
.math-hdr { font-family: var(--font-display); font-size: 11px; font-weight: 600; letter-spacing: 0.11em; text-transform: uppercase; margin-bottom: 10px; display: flex; align-items: center; gap: 6px; }
.ci .math-hdr { color: #818cf8; } .cv .math-hdr { color: #c4b5fd; } .ct .math-hdr { color: #5eead4; }
.cs .math-hdr { color: #7dd3fc; } .ca .math-hdr { color: #fbbf24; } .ce .math-hdr { color: #34d399; }
.f-lbl { font-size: 8px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-4); margin-top: 9px; margin-bottom: 4px; }
.f-lbl:first-of-type { margin-top: 0; }
.fbox { background: rgba(0,0,0,0.35); border: 1px solid rgba(99,102,241,0.13); border-radius: 7px; padding: 11px 13px; font-family: var(--font-mono); font-size: 11.5px; line-height: 1.85; color: #c7d2fe; white-space: pre; }
.v  { color: #34d399; } .fn { color: #a78bfa; } .n { color: #fbbf24; }
.op { color: #e2e8f0; } .cm { color: #3f4f65; font-style: italic; font-size: 10px; } .hl { color: #f1f5f9; font-weight: 600; }
.math-note { font-size: 9.5px; color: var(--text-3); margin-top: 8px; line-height: 1.5; }
.math-note strong { color: #94a3b8; font-weight: 600; }

/* ── SIGNAL IMPORTANCE ── */
.imp-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 13px; }
.imp-group { background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.055); border-radius: 10px; padding: 14px; border-top: 2px solid; }
.ig-ind { border-top-color: #6366f1; } .ig-tea { border-top-color: #14b8a6; } .ig-amb { border-top-color: #f59e0b; }
.imp-ghdr { display: flex; align-items: center; gap: 8px; margin-bottom: 11px; padding-bottom: 8px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.imp-gtitle { font-family: var(--font-display); font-size: 10.5px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; }
.ig-ind .imp-gtitle { color: #818cf8; } .ig-tea .imp-gtitle { color: #5eead4; } .ig-amb .imp-gtitle { color: #fbbf24; }
.imp-gcount { font-size: 8px; color: var(--text-4); margin-left: auto; }
.sig-row { display: flex; align-items: center; gap: 7px; margin-bottom: 6px; }
.sig-row:last-child { margin-bottom: 0; }
.sig-idx { font-family: var(--font-mono); font-size: 8px; font-weight: 600; color: #374155; min-width: 22px; flex-shrink: 0; }
.sig-name { font-size: 9px; color: #64748b; flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sig-bar-wrap { width: 72px; height: 5px; background: rgba(255,255,255,0.04); border-radius: 3px; overflow: hidden; flex-shrink: 0; }
.sig-bar { height: 100%; border-radius: 3px; }
.ig-ind .sig-bar { background: linear-gradient(90deg, #4f46e5, #818cf8); }
.ig-tea .sig-bar { background: linear-gradient(90deg, #0d9488, #5eead4); }
.ig-amb .sig-bar { background: linear-gradient(90deg, #d97706, #fbbf24); }
.sig-val { font-family: var(--font-mono); font-size: 8.5px; color: var(--text-3); min-width: 28px; text-align: right; flex-shrink: 0; }

/* ── FEATURE GRID ── */
.feature-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 13px; }
.feat-col { background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.055); border-radius: 10px; padding: 14px; }
.feat-col-hdr { display: flex; align-items: center; gap: 9px; margin-bottom: 11px; padding-bottom: 9px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.feat-col-icon { font-size: 14px; flex-shrink: 0; }
.feat-col-title { font-family: var(--font-display); font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: #cbd5e1; }
.feat-col-src { font-size: 8.5px; color: var(--text-4); margin-top: 1px; }
.feat-item { margin-bottom: 9px; }
.feat-item:last-child { margin-bottom: 0; }
.feat-name { font-family: var(--font-mono); font-size: 10px; font-weight: 500; color: #818cf8; margin-bottom: 2px; }
.feat-desc { font-size: 10px; color: var(--text-3); line-height: 1.42; }

/* ── VALIDATION ── */
.val-wrap { display: grid; grid-template-columns: auto 1fr; gap: 13px; }
.val-metrics { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; gap: 11px; }
.val-card { background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.055); border-radius: 10px; padding: 14px 12px; text-align: center; min-width: 128px; }
.val-lbl { font-size: 8px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-4); margin-bottom: 8px; line-height: 1.35; }
.val-num { font-family: var(--font-display); font-size: 22px; font-weight: 700; line-height: 1; margin-bottom: 4px; }
.val-num.g { color: #22c55e; } .val-num.i { color: #818cf8; } .val-num.a { color: #f59e0b; }
.val-num.r { color: #ef4444; } .val-num.w { color: #f1f5f9; }
.val-sub { font-size: 8.5px; color: var(--text-4); line-height: 1.4; }
.roi-block { background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.055); border-radius: 10px; padding: 16px 20px; display: flex; flex-direction: column; justify-content: center; }
.roi-title { font-family: var(--font-display); font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: #22c55e; margin-bottom: 3px; }
.roi-sub { font-size: 9px; color: var(--text-4); margin-bottom: 14px; }
.roi-row { display: flex; align-items: center; gap: 11px; margin-bottom: 8px; }
.roi-row:last-child { margin-bottom: 0; }
.roi-row.baseline { margin-top: 8px; padding-top: 8px; border-top: 1px solid rgba(255,255,255,0.04); }
.roi-year { font-family: var(--font-mono); font-size: 9px; color: var(--text-3); min-width: 46px; }
.roi-year.dim { color: var(--text-4); }
.roi-bar-wrap { flex: 1; height: 7px; background: rgba(255,255,255,0.03); border-radius: 4px; overflow: hidden; }
.roi-fill { height: 100%; border-radius: 4px; }
.roi-fill.pos { background: linear-gradient(90deg, #16a34a, #22c55e); }
.roi-fill.neg { background: linear-gradient(90deg, #b91c1c, #ef4444); }
.roi-pct { font-family: var(--font-mono); font-size: 10px; font-weight: 600; min-width: 44px; text-align: right; }
.roi-pct.pos { color: #22c55e; } .roi-pct.neg { color: #ef4444; }
.roi-meta { font-size: 8.5px; color: var(--text-4); min-width: 90px; text-align: right; }

/* ── FOOTER ── */

/* ── QUICK SUMMARY ── */
.quick-summary {
  background: rgba(99,102,241,0.06);
  border: 1px solid rgba(99,102,241,0.18);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 20px;
}
.qs-title {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #818cf8;
  margin-bottom: 10px;
}
.qs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0;
  margin: 0;
}
.qs-list li {
  font-size: 11.5px;
  color: #64748b;
  line-height: 1.5;
  padding-left: 14px;
  position: relative;
}
.qs-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: #6366f1;
  font-size: 10px;
}
.qs-list li strong { color: #94a3b8; font-weight: 600; }

/* ── PAGE NAV ── */
.page-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 8px 14px;
  background: rgba(11,15,26,0.95);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: 8px;
  flex-wrap: wrap;
  position: sticky;
  top: var(--nav-h);
  z-index: 90;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.pn-link {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-3);
  text-decoration: none;
  text-transform: uppercase;
  transition: color 0.15s;
}
.pn-link:hover { color: #818cf8; }
.pn-sep { color: var(--text-4); font-size: 10px; }

/* ── COLLAPSIBLE MATH ── */
.coll-trigger {
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  user-select: none;
}
.coll-trigger:hover .coll-arrow-m { color: #818cf8; }
.coll-arrow-m {
  font-size: 10px;
  color: var(--text-4);
  transition: transform 0.2s;
  flex-shrink: 0;
}
.math-coll.open .coll-arrow-m { transform: rotate(180deg); }
.coll-body-m { display: none; padding-top: 12px; }
.math-coll.open .coll-body-m { display: block; }

/* ── EXAMPLE CARD ── */
.example-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.055);
  border-radius: 10px;
  padding: 18px;
}
.ex-row { display: flex; flex-direction: column; gap: 14px; margin-bottom: 14px; }
.ex-step { display: flex; align-items: flex-start; gap: 12px; }
.ex-num {
  width: 22px; height: 22px; border-radius: 50%;
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.3);
  color: #818cf8; font-size: 10px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 1px;
}
.ex-content { flex: 1; }
.ex-title { font-size: 10px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); margin-bottom: 3px; }
.ex-text { font-size: 11px; color: var(--text-3); line-height: 1.5; }
.ex-text strong { color: #64748b; font-weight: 600; }
.ex-note { font-size: 10px; color: var(--text-4); border-top: 1px solid rgba(255,255,255,0.04); padding-top: 10px; line-height: 1.5; }

/* ── MOBILE ── */
@media (max-width: 700px) {
  .page-nav { top: 0; }  /* global nav is position:relative on mobile, so stick to viewport top */
  .fbox { overflow-x: auto; -webkit-overflow-scrolling: touch; white-space: pre; }
  .math-grid { grid-template-columns: 1fr; }
  .imp-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .pipeline { flex-direction: column; }
  .pipe-stage { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.04); }
  .pipe-stage:last-child { border-bottom: none; }
  .msig { flex-direction: column; }
  .msig-cell { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.04); }
  .msig-cell:last-child { border-bottom: none; }
  .val-wrap { grid-template-columns: 1fr; }
  .val-metrics { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .val-card { min-width: 0; }
  .wrap { padding: 16px 14px 32px; }
}