/* ============================================================
   Clarity. — 6Ms Constraints Framework · Visual System
   ============================================================ */

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

:root {
  --bg:            #09090b;
  --bg-raised:     #111113;
  --border:        rgba(255,255,255,0.06);
  --border-mid:    rgba(255,255,255,0.10);
  --border-strong: rgba(255,255,255,0.20);
  --text:          #fafafa;
  --muted:         #d4d4d8;
  --dim:           #a1a1aa;
  --subtle:        #52525b;
  --accent:        #429edb;
  --accent-hover:  #72bcec;
  --accent-dim:    rgba(66,158,219,0.10);
  --accent-soft:   rgba(66,158,219,0.08);

  --m-more:      #56d4e8;
  --m-metrics:   #a78bfa;
  --m-market:    #dc8c32;
  --m-model:     #e850a0;
  --m-money:     #ffde59;
  --m-manpower:  #ff5a5a;
  --d-ignorance: #5271ff;
  --d-avoidance: #34d399;

  --font:       'Outfit','Inter',Helvetica,Arial,sans-serif;
  --font-brand: Helvetica,'Helvetica Neue',Arial,sans-serif;
  --ease:       cubic-bezier(0.16,1,0.3,1);
}

html, body {
  width: 100%; min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Ambient background tint */
body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse 62% 44% at 82% 8%, rgba(66,158,219,0.05) 0%, transparent 60%),
    radial-gradient(ellipse 55% 38% at 18% 92%, rgba(52,211,153,0.025) 0%, transparent 60%);
  pointer-events: none; z-index: 0;
}

.noise {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='256' height='256'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.68' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='256' height='256' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
}

/* ── Top nav ──────────────────────────────────────────────── */
.site-nav {
  position: fixed; top: 12px; left: 12px; right: 12px; z-index: 100;
  display: flex; height: 62px; align-items: center; justify-content: space-between;
  border-radius: 14px; border: 1px solid var(--border);
  background: rgba(9,9,11,0.85);
  padding: 0 24px;
  box-shadow: 0 4px 32px rgba(0,0,0,0.4);
  backdrop-filter: blur(28px); -webkit-backdrop-filter: blur(28px);
}
.brand-mark {
  font-family: var(--font-brand);
  font-size: 22px; font-weight: 700; letter-spacing: -0.03em;
  color: #fafafa; text-decoration: none;
}
.logo-dot {
  display: inline-block; width: 0.2em; height: 0.2em;
  background: var(--accent); border-radius: 0;
  vertical-align: 0.1em; margin-left: 0.03em;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-link {
  font-size: 13px; font-weight: 700; color: var(--dim);
  letter-spacing: 0.06em; text-decoration: none; text-transform: uppercase;
  transition: color 0.2s;
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.btn-nav {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 20px; background: var(--accent);
  border-radius: 10px; color: var(--bg);
  font-size: 13px; font-weight: 700; text-decoration: none;
  transition: background 0.2s, transform 0.2s var(--ease);
}
.btn-nav:hover { background: var(--accent-hover); transform: translateY(-1px); }

/* ── Page shell ─────────────────────────────────────────── */
main {
  position: relative; z-index: 1;
  padding: 98px 24px 24px;
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(300px, 420px) minmax(0, 1fr);
  gap: 32px;
  max-width: 1600px;
  margin: 0 auto;
  align-items: stretch;
}

/* ── Left column ─────────────────────────────────────────── */
.col-left {
  display: flex; flex-direction: column; gap: 16px;
  padding: 16px 4px;
  min-height: 0;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent);
  padding: 6px 12px;
  background: var(--accent-dim);
  border: 1px solid rgba(66,158,219,0.2);
  border-radius: 999px;
  width: fit-content;
}
.eyebrow-dot {
  width: 6px; height: 6px; background: var(--accent);
  border-radius: 50%;
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.85); }
}

h1.hero {
  font-size: clamp(32px, 3.4vw, 44px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.035em;
  color: var(--text);
  margin-top: 4px;
}
h1.hero em {
  font-style: normal;
  color: var(--accent);
}
.lede {
  font-size: 16px;
  line-height: 1.65;
  color: var(--muted);
  margin-top: 8px;
  text-wrap: pretty;
}

.stat-row {
  display: grid; grid-template-columns: repeat(2,1fr); gap: 8px; margin-top: 8px;
}
.stat {
  padding: 12px 14px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border); border-radius: 10px;
}
.stat-num {
  font-size: 20px; font-weight: 800; color: var(--text);
  letter-spacing: -0.02em; line-height: 1;
}
.stat-num .accent { color: var(--accent); }
.stat-label { font-size: 11px; color: var(--dim); margin-top: 5px; letter-spacing: 0.02em; }

/* Quiz launcher card */
.quiz-card {
  margin-top: 4px; padding: 20px;
  background: linear-gradient(145deg, rgba(66,158,219,0.08) 0%, rgba(66,158,219,0.02) 100%);
  border: 1px solid rgba(66,158,219,0.22); border-radius: 16px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
  position: relative; overflow: hidden;
}
.quiz-card::before {
  content: '';
  position: absolute; top: -40%; right: -20%;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(66,158,219,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.quiz-card-label {
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent);
}
.quiz-card-title {
  font-size: 19px; font-weight: 700;
  color: var(--text); margin-top: 6px;
  letter-spacing: -0.02em; line-height: 1.2;
}
.quiz-card-sub { font-size: 13px; color: var(--muted); margin-top: 6px; line-height: 1.55; }
.quiz-card-meta {
  display: flex; gap: 14px; margin-top: 12px;
  font-size: 11px; color: var(--dim); letter-spacing: 0.04em;
}
.quiz-card-meta span::before {
  content: ''; display: inline-block;
  width: 4px; height: 4px; background: var(--accent);
  border-radius: 1px; margin-right: 6px; vertical-align: 2px;
}
.btn-quiz {
  margin-top: 14px; display: flex; width: 100%;
  align-items: center; justify-content: space-between;
  padding: 13px 18px;
  background: var(--accent); color: var(--bg);
  border: 0; border-radius: 10px;
  font-family: var(--font); font-size: 14px; font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s var(--ease);
}
.btn-quiz:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-quiz .arrow { transition: transform 0.2s var(--ease); }
.btn-quiz:hover .arrow { transform: translateX(3px); }

/* Legend */
.legend {
  margin-top: 16px; padding: 16px 18px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border); border-radius: 14px;
}
.legend-title {
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--dim); margin-bottom: 10px;
}
.legend-row {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 0; font-size: 13px; color: var(--muted);
  cursor: pointer; transition: color 0.15s;
}
.legend-row:hover { color: var(--text); }
.legend-row strong { color: var(--text); font-weight: 700; margin-right: 4px; }
.legend-chip {
  width: 14px; height: 12px; flex-shrink: 0;
  clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
}
.legend-row[data-id="more"]     .legend-chip { background: var(--m-more); }
.legend-row[data-id="metrics"]  .legend-chip { background: var(--m-metrics); }
.legend-row[data-id="market"]   .legend-chip { background: var(--m-market); }
.legend-row[data-id="model"]    .legend-chip { background: var(--m-model); }
.legend-row[data-id="money"]    .legend-chip { background: var(--m-money); }
.legend-row[data-id="manpower"] .legend-chip { background: var(--m-manpower); }

/* ── Right column: diagram ───────────────────────────────── */
.col-right {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  min-height: calc(100vh - 130px);
}
.diagram-frame {
  position: relative; width: 100%; aspect-ratio: 1;
  max-width: min(820px, calc(100vh - 160px));
  max-height: calc(100vh - 160px);
}
svg#diagram {
  width: 100%; height: 100%;
  overflow: visible; cursor: default;
}

/* Orbit rings */
.orbit {
  fill: none; stroke: rgba(255,255,255,0.06);
  stroke-width: 1; stroke-dasharray: 2 6;
  animation: orbit-breathe 14s ease-in-out infinite;
}
@keyframes orbit-breathe {
  0%, 100% { stroke-opacity: 0.4; }
  50%       { stroke-opacity: 1; }
}
.orbit-inner {
  fill: none; stroke: rgba(255,255,255,0.04); stroke-width: 1;
}

/* Flowing arrows between nodes */
.flow-arrow {
  fill: none; stroke: rgba(255,255,255,0.14);
  stroke-width: 1.2; stroke-linecap: round;
  stroke-dasharray: 4 8;
  animation: flow 6s linear infinite;
}
@keyframes flow {
  0%   { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -120; }
}

.center-ring {
  fill: none; stroke: rgba(255,255,255,0.05); stroke-width: 1;
}

/* ── Hex node — tactile glass ──────────────────────────────
   POSITIONING: SVG transform attribute on .node is position-only.
   ANIMATION:   .node-anim is a child <g> that receives the CSS
                outward translate on hover — no transform-box, no
                conflict with the parent SVG transform attribute.     */

.node { cursor: pointer; }

/* Smooth outward nudge on hover */
.node-anim {
  transition: transform 0.4s var(--ease);
  will-change: transform;
}
.node:hover .node-anim {
  transform: translate(calc(var(--ox) * 8px), calc(var(--oy) * 8px));
}

.node .node-core { transition: filter 0.3s var(--ease); }

.node-shadow {
  fill: rgba(0,0,0,0.55); filter: blur(10px);
  opacity: 0.8; transition: opacity 0.3s;
}
.node:hover .node-shadow { opacity: 1; }

.node:hover .node-core,
.node.active .node-core {
  filter: drop-shadow(0 0 20px var(--glow));
}

.node-base {
  fill: #0c0c10;
  stroke: rgba(255,255,255,0.08); stroke-width: 1;
}
.node-tint {
  mix-blend-mode: screen; opacity: 0.85; transition: opacity 0.3s;
}
.node:hover .node-tint,
.node.active .node-tint { opacity: 1; }

.node-rim {
  fill: none; stroke-width: 1.4; opacity: 0.85;
  transition: stroke-width 0.25s, opacity 0.25s;
}
.node:hover .node-rim,
.node.active .node-rim { stroke-width: 2.2; opacity: 1; }

.node-highlight {
  fill: url(#hex-specular); pointer-events: none;
  opacity: 0.75; transition: opacity 0.3s;
}
.node:hover .node-highlight { opacity: 1; }

.node-inner-edge {
  fill: none; stroke: rgba(255,255,255,0.06); stroke-width: 1; pointer-events: none;
}

.node-label {
  font-family: var(--font); font-size: 11px; font-weight: 800;
  letter-spacing: 0.16em; text-anchor: middle; dominant-baseline: central;
  fill: rgba(255,255,255,0.92); pointer-events: none; transition: fill 0.2s;
}
.node:hover .node-label,
.node.active .node-label { fill: #fff; }

.node-sublabel {
  font-family: var(--font); font-size: 8.5px; font-weight: 500;
  letter-spacing: 0.08em; text-anchor: middle; dominant-baseline: central;
  fill: rgba(255,255,255,0.45); pointer-events: none;
  transition: fill 0.2s; text-transform: uppercase;
}
.node:hover .node-sublabel,
.node.active .node-sublabel { fill: rgba(255,255,255,0.75); }

.node-index {
  font-family: var(--font); font-size: 9px; font-weight: 700;
  letter-spacing: 0.08em; text-anchor: middle; dominant-baseline: central;
  fill: rgba(255,255,255,0.35); pointer-events: none;
}

/* Debt hexes — centred, nudge up on hover.
   Same pattern as outer nodes: SVG transform attribute on .debt for position,
   CSS transform on .debt-anim child for animation — no transform-box conflict. */
.debt { cursor: pointer; }

.debt-anim { transition: transform 0.4s var(--ease); will-change: transform; }
.debt:hover .debt-anim { transform: translateY(-3px); }

.debt-shadow { fill: rgba(0,0,0,0.5); filter: blur(8px); opacity: 0.7; }
.debt-base { fill: #0a0a0e; stroke: rgba(255,255,255,0.08); stroke-width: 1; }
.debt-tint { mix-blend-mode: screen; opacity: 0.6; transition: opacity 0.3s; }
.debt:hover .debt-tint,
.debt.active .debt-tint { opacity: 0.9; }
.debt-rim { fill: none; stroke-width: 1.2; opacity: 0.65; transition: stroke-width 0.2s, opacity 0.2s; }
.debt:hover .debt-rim,
.debt.active .debt-rim { stroke-width: 1.8; opacity: 1; }
.debt-highlight { fill: url(#hex-specular-debt); pointer-events: none; opacity: 0.55; }
.debt-label {
  font-family: var(--font); font-size: 8.5px; font-weight: 800;
  letter-spacing: 0.13em; text-anchor: middle; dominant-baseline: central;
  fill: rgba(255,255,255,0.85); pointer-events: none; text-transform: uppercase;
}

.center-caption {
  font-family: var(--font); font-size: 8px; font-weight: 700;
  letter-spacing: 0.2em; text-anchor: middle;
  fill: rgba(255,255,255,0.3); text-transform: uppercase; pointer-events: none;
}

/* Quiz result pulse */
@keyframes result-pulse {
  0%   { filter: drop-shadow(0 0 0 transparent); }
  30%  { filter: drop-shadow(0 0 28px var(--glow)); }
  100% { filter: drop-shadow(0 0 14px var(--glow)); }
}
.node.result .node-core {
  animation: result-pulse 1.6s ease-out;
  filter: drop-shadow(0 0 18px var(--glow));
}
.node.dim { opacity: 0.35; transition: opacity 0.5s var(--ease); }

/* ── Right drawer panel ──────────────────────────────────── */
.panel {
  position: fixed; top: 0; right: 0; bottom: 0;
  width: min(440px, 92vw);
  background: rgba(9,9,11,0.97);
  border-left: 1px solid var(--border-mid);
  box-shadow: -4px 0 40px rgba(0,0,0,0.5), inset 0 0 0 1px rgba(255,255,255,0.03);
  backdrop-filter: blur(32px); -webkit-backdrop-filter: blur(32px);
  z-index: 120;
  display: flex; flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.4s var(--ease);
}
.panel.open { transform: translateX(0); }

.panel-accent-bar { height: 3px; background: var(--panel-accent, var(--accent)); flex-shrink: 0; }

.panel-header {
  padding: 22px 26px 18px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: flex-start; justify-content: space-between; gap: 14px;
  flex-shrink: 0;
}
.panel-header-left { display: flex; flex-direction: column; gap: 12px; flex: 1; }
.panel-type-row { display: flex; align-items: center; gap: 8px; }
.panel-type {
  font-size: 10px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  padding: 3px 10px; border-radius: 999px;
  background: rgba(255,255,255,0.05); border: 1px solid var(--border); color: var(--dim);
}
.panel-type.constraint,
.panel-type.debt {
  color: var(--panel-accent, var(--accent));
  /* Safari <17 fallback — overridden by color-mix where supported */
  background: rgba(66,158,219,0.12);
  border-color: rgba(66,158,219,0.35);
  background: color-mix(in oklab, var(--panel-accent, var(--accent)) 12%, transparent);
  border-color: color-mix(in oklab, var(--panel-accent, var(--accent)) 35%, transparent);
}
.panel-tagline { font-size: 12px; color: var(--dim); letter-spacing: 0.02em; }
.panel-title { font-size: 30px; font-weight: 800; color: var(--text); letter-spacing: -0.03em; line-height: 1.05; }

.close-btn {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; flex-shrink: 0;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border); border-radius: 8px;
  cursor: pointer; font-size: 14px; color: var(--dim); font-family: inherit;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.close-btn:hover { background: rgba(255,255,255,0.08); border-color: var(--border-mid); color: var(--text); }

.panel-body { padding: 22px 26px 28px; flex: 1; overflow-y: auto; }
.panel-body::-webkit-scrollbar { width: 4px; }
.panel-body::-webkit-scrollbar-track { background: transparent; }
.panel-body::-webkit-scrollbar-thumb { background: var(--border-mid); border-radius: 4px; }

.panel-def { font-size: 15px; line-height: 1.7; color: var(--muted); margin-bottom: 22px; text-wrap: pretty; }

.section-label {
  font-size: 10px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--dim); margin: 20px 0 10px;
  padding-bottom: 8px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
}
.section-label-chip {
  width: 10px; height: 9px;
  clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
  background: var(--panel-accent, var(--accent));
}

.bullet {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 10px 0; border-bottom: 1px solid var(--border);
  font-size: 14px; color: var(--muted); line-height: 1.6;
}
.bullet:last-child { border-bottom: none; }
.bullet-mark {
  flex-shrink: 0; width: 7px; height: 6px;
  clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
  background: var(--panel-accent, var(--accent)); margin-top: 8px;
}

.panel-cta {
  margin-top: 26px; padding: 18px;
  background: rgba(66,158,219,0.06); border: 1px solid rgba(66,158,219,0.18); border-radius: 12px;
}
.panel-cta-prompt { font-size: 14px; color: var(--muted); margin-bottom: 12px; line-height: 1.55; }
.panel-cta-prompt strong { color: var(--text); }
.btn-cta {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 20px; background: var(--accent); border-radius: 10px; color: var(--bg);
  font-size: 14px; font-weight: 700; text-align: center; text-decoration: none;
  transition: background 0.2s, transform 0.2s var(--ease);
}
.btn-cta:hover { background: var(--accent-hover); transform: translateY(-1px); }

/* Backdrop */
.backdrop {
  position: fixed; inset: 0;
  background: rgba(9,9,11,0.6); backdrop-filter: blur(2px);
  z-index: 115; opacity: 0; pointer-events: none; transition: opacity 0.35s ease;
}
.backdrop.show { opacity: 1; pointer-events: auto; }

/* ── Quiz modal ──────────────────────────────────────────── */
.quiz-modal {
  position: fixed; inset: 0; z-index: 130;
  display: flex; align-items: center; justify-content: center; padding: 20px;
  opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.quiz-modal.open { opacity: 1; pointer-events: auto; }
.quiz-modal-bg {
  position: absolute; inset: 0;
  background: rgba(9,9,11,0.75); backdrop-filter: blur(8px);
}
.quiz-shell {
  position: relative; width: min(620px, 100%);
  max-height: calc(100vh - 40px);
  background: #0c0c10;
  border: 1px solid var(--border-mid); border-radius: 20px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.7), inset 0 1px 0 rgba(255,255,255,0.06);
  display: flex; flex-direction: column; overflow: hidden;
}
.quiz-header {
  padding: 22px 26px 14px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.quiz-progress { flex: 1; display: flex; gap: 4px; }
.quiz-progress-cell {
  flex: 1; height: 3px; background: rgba(255,255,255,0.08);
  border-radius: 2px; overflow: hidden; position: relative;
}
.quiz-progress-cell.done::after,
.quiz-progress-cell.current::after {
  content: ''; position: absolute; inset: 0; background: var(--accent);
  transform-origin: left; animation: cell-fill 0.4s var(--ease) forwards;
}
.quiz-progress-cell.current::after { background: var(--accent); opacity: 0.4; }
@keyframes cell-fill {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}
.quiz-step-label {
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--dim); flex-shrink: 0;
}
.quiz-body { padding: 26px 30px 22px; overflow-y: auto; flex: 1; }
.quiz-q {
  font-size: 22px; font-weight: 700; color: var(--text);
  letter-spacing: -0.02em; line-height: 1.25; margin-bottom: 6px; text-wrap: balance;
}
.quiz-sub { font-size: 13px; color: var(--dim); margin-bottom: 18px; }
.quiz-options { display: flex; flex-direction: column; gap: 8px; }
.quiz-option {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px 16px;
  background: rgba(255,255,255,0.02); border: 1px solid var(--border); border-radius: 10px;
  font-family: var(--font); font-size: 14px; color: var(--muted);
  text-align: left; cursor: pointer; line-height: 1.4;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.quiz-option::before {
  content: ''; flex-shrink: 0; width: 14px; height: 14px;
  border: 1.5px solid var(--border-mid); border-radius: 50%; margin-top: 2px;
  transition: border-color 0.15s, background 0.15s;
}
.quiz-option:hover { background: rgba(255,255,255,0.04); border-color: var(--border-mid); color: var(--text); }
.quiz-option:hover::before { border-color: var(--accent); }
.quiz-option.selected { background: rgba(66,158,219,0.08); border-color: rgba(66,158,219,0.4); color: var(--text); }
.quiz-option.selected::before { border-color: var(--accent); background: var(--accent); box-shadow: inset 0 0 0 3px #0c0c10; }

.quiz-footer {
  padding: 16px 26px; border-top: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-shrink: 0;
}
.quiz-footer-end { display: flex; gap: 10px; align-items: center; }
.btn-ghost {
  padding: 10px 16px; background: transparent;
  border: 1px solid var(--border); border-radius: 10px;
  font-family: var(--font); font-size: 13px; font-weight: 600; color: var(--dim);
  cursor: pointer; transition: color 0.2s, border-color 0.2s;
}
a.btn-ghost { text-decoration: none; display: inline-flex; align-items: center; }
.btn-ghost:hover { color: var(--text); border-color: var(--border-mid); }
.btn-ghost:disabled { opacity: 0.3; cursor: not-allowed; }
.btn-primary {
  padding: 11px 20px; background: var(--accent); border: 0; border-radius: 10px; color: var(--bg);
  font-family: var(--font); font-size: 13px; font-weight: 700; cursor: pointer;
  transition: background 0.2s, transform 0.2s var(--ease);
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

/* Quiz result */
.quiz-result { padding: 28px 30px 22px; text-align: left; overflow-y: auto; }
.result-eyebrow {
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--dim); margin-bottom: 8px;
}
.result-title {
  font-size: 36px; font-weight: 800; letter-spacing: -0.035em; line-height: 1.05; margin-bottom: 4px;
  color: var(--result-color, var(--accent));
}
.result-title .tag {
  display: inline-block; font-size: 14px; font-weight: 700; letter-spacing: 0;
  padding: 4px 10px; border-radius: 999px; vertical-align: 6px; margin-left: 8px;
  color: var(--result-color, var(--accent));
  /* Safari <17 fallback */
  background: rgba(66,158,219,0.15);
  background: color-mix(in oklab, var(--result-color, var(--accent)) 15%, transparent);
}
.result-sub { font-size: 14px; color: var(--dim); margin-bottom: 18px; letter-spacing: 0.02em; }
.result-def {
  font-size: 15px; color: var(--muted); line-height: 1.7; margin-bottom: 18px;
  padding: 16px 18px;
  border-left: 2px solid var(--result-color, var(--accent));
  background: rgba(255,255,255,0.02); border-radius: 0 10px 10px 0; text-wrap: pretty;
}
.result-secondary {
  margin-bottom: 20px; display: flex; align-items: center; gap: 10px;
  font-size: 12px; color: var(--dim);
  padding: 10px 14px; background: rgba(255,255,255,0.02);
  border: 1px solid var(--border); border-radius: 10px;
}
.result-secondary strong { color: var(--muted); }
.result-chip-mini {
  width: 10px; height: 9px;
  clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
}
.result-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ── Focus-visible ──────────────────────────────────────── */
.legend-row:focus-visible,
.quiz-option:focus-visible,
.btn-quiz:focus-visible,
.btn-quiz-ghost:focus-visible,
.btn-ghost:focus-visible,
.btn-primary:focus-visible,
.btn-cta:focus-visible,
.close-btn:focus-visible,
.btn-nav:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Remove default outline — replaced by focus-visible above */
.legend-row:focus,
.quiz-option:focus,
.btn-quiz:focus,
.btn-quiz-ghost:focus,
.btn-ghost:focus,
.btn-primary:focus,
.btn-cta:focus,
.close-btn:focus,
.btn-nav:focus { outline: none; }

/* ── Mobile nav — hamburger + slide-down menu ────────────── */
.nav-hamburger {
  display: none; flex-direction: column; justify-content: center; align-items: center;
  width: 36px; height: 36px; gap: 5px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border); border-radius: 8px;
  cursor: pointer; padding: 0; flex-shrink: 0;
  transition: background 0.2s, border-color 0.2s;
}
.nav-hamburger:hover { background: rgba(255,255,255,0.07); }
.nav-hamburger:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.nav-hamburger span {
  display: block; width: 16px; height: 1.5px;
  background: rgba(255,255,255,0.6); border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-menu {
  position: fixed; top: 80px; left: 12px; right: 12px;
  background: rgba(9,9,11,0.97); border: 1px solid var(--border);
  border-radius: 14px; box-shadow: 0 8px 40px rgba(0,0,0,0.6);
  backdrop-filter: blur(28px); -webkit-backdrop-filter: blur(28px);
  z-index: 99; display: flex; flex-direction: column; padding: 8px;
  transform: translateY(-6px); opacity: 0; pointer-events: none;
  transition: transform 0.22s cubic-bezier(0.25,0.46,0.45,0.94), opacity 0.22s ease;
}
.mobile-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-menu-link {
  font-family: var(--font); font-size: 13px; font-weight: 700;
  color: var(--dim); text-decoration: none; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 13px 16px; border-radius: 8px; transition: color 0.15s, background 0.15s;
}
.mobile-menu-link:hover, .mobile-menu-link.active { color: var(--text); background: rgba(255,255,255,0.04); }
.mobile-menu-divider { height: 1px; background: var(--border); margin: 4px 8px; }
.mobile-menu-cta {
  display: block; margin: 6px 0 2px; padding: 13px 20px;
  background: var(--accent); border-radius: 10px; color: #fff;
  font-family: var(--font); font-size: 13px; font-weight: 700;
  text-align: center; text-decoration: none; transition: opacity 0.2s;
}
.mobile-menu-cta:hover { opacity: 0.88; }

/* ── quiz-start-2 override: full-width ghost button in panel CTA ── */
.btn-quiz-ghost {
  width: 100%; margin-top: 10px; padding: 12px;
  background: transparent; border: 1px solid var(--border); border-radius: 10px;
  font-family: var(--font); font-size: 13px; font-weight: 600; color: var(--dim);
  cursor: pointer; transition: color 0.2s, border-color 0.2s;
}
.btn-quiz-ghost:hover { color: var(--text); border-color: var(--border-mid); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 960px) {
  main {
    grid-template-columns: 1fr;
    padding: 90px 20px 24px; gap: 20px;
  }
  .col-left { padding: 0; }
  .col-right { min-height: unset; }
  .diagram-frame { max-width: min(620px, 92vw); margin: 0 auto; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .btn-nav { display: none; }
  h1.hero { font-size: clamp(28px, 6vw, 36px); }
  .panel { width: 100%; }
}