:root {
  --bg-rgb: 5, 5, 5;
  --ink-rgb: 242, 242, 242;
  --acc-rgb: 255, 77, 31;
  --green-rgb: 61, 220, 132;
  --blue-rgb: 77, 163, 255;
  --amber-rgb: 255, 176, 32;
  --purple-rgb: 168, 85, 247;
  --crimson-rgb: 244, 63, 94;
  --bg: #050505;
  --bg-2: #0b0b0b;
  --surface: #08090b;
  --surface-hover: #0e1015;
  --panel: #0c0d11;
  --ink: #f2f2f2;
  --ink-2: rgba(var(--ink-rgb), 0.85);
  --dim: rgba(var(--ink-rgb), 0.64);
  --faint: rgba(var(--ink-rgb), 0.13);
  --hair: rgba(var(--ink-rgb), 0.07);
  --accent: #ff4d1f;
  --accent-dim: rgba(var(--acc-rgb), 0.22);
  --on-accent: #050505;
  --blue: #4da3ff;
  --green: #3ddc84;
  --amber: #ffb020;
  --purple: #a855f7;
  --crimson: #f43f5e;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --dot: "Doto", "IBM Plex Mono", monospace;
  --gutter: clamp(16px, 3.8vw, 48px);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg-rgb: 243, 241, 234;
  --ink-rgb: 20, 22, 26;
  --acc-rgb: 220, 62, 14;
  --green-rgb: 14, 140, 82;
  --blue-rgb: 31, 111, 209;
  --amber-rgb: 184, 110, 0;
  --purple-rgb: 126, 34, 206;
  --crimson-rgb: 225, 29, 72;
  --bg: #f3f1ea;
  --bg-2: #ebe8df;
  --surface: #efece4;
  --surface-hover: #e5e1d5;
  --panel: #ebe7dd;
  --ink: #14161a;
  --ink-2: rgba(var(--ink-rgb), 0.84);
  --dim: rgba(var(--ink-rgb), 0.64);
  --faint: rgba(var(--ink-rgb), 0.2);
  --hair: rgba(var(--ink-rgb), 0.085);
  --accent: #dc3e0e;
  --accent-dim: rgba(var(--acc-rgb), 0.2);
  --on-accent: #ffffff;
  --blue: #1f6fd1;
  --green: #0e8c52;
  --amber: #b86e00;
  --purple: #7e22ce;
  --crimson: #e11d48;
  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--sans);
  font-weight: 300;
  background-color: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background-image:
    linear-gradient(to right, rgba(var(--ink-rgb), 0.016) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(var(--ink-rgb), 0.016) 1px, transparent 1px);
  background-size: 64px 64px;
}

.mono { font-family: var(--mono); }
.dim-text { color: var(--dim); font-size: 11px; letter-spacing: 0.08em; }
.accent-text { color: var(--accent); }
.green-text { color: var(--green); }
.blue-text { color: var(--blue); }
.amber-text { color: var(--amber); }

/* Mouse ambient glow (GPU-composited layer) */
.fx-glow {
  position: fixed;
  left: 0;
  top: 0;
  width: 560px;
  height: 560px;
  margin: -280px 0 0 -280px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  opacity: 0;
  will-change: transform;
  contain: strict;
  transition: opacity 0.5s ease;
  background: radial-gradient(circle, rgba(var(--acc-rgb), 0.08), transparent 62%);
}

.fx-glow.on { opacity: 1; }

@media (pointer: coarse) {
  .fx-glow { display: none !important; }
}

/* ============================================================================
   TOPBAR
   ============================================================================ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 11px var(--gutter);
  background: rgba(var(--bg-rgb), 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--faint);
}

.topbar-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(var(--ink-rgb), 0.06);
  pointer-events: none;
  overflow: hidden;
}

.topbar-progress-bar {
  height: 100%;
  width: 100%;
  transform-origin: left center;
  transform: scaleX(0.08);
  will-change: transform;
  background: linear-gradient(90deg, rgba(var(--acc-rgb), 0.35), var(--accent));
}

.brand {
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  flex: none;
}

.brand-mark {
  font-family: var(--dot);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.04em;
}

.brand-sub {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--dim);
  letter-spacing: 0.14em;
  margin-top: 3px;
}

.tabs {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  margin-inline-start: auto;
  padding: 2px 0;
}

.tabs::-webkit-scrollbar { display: none; }

.tab {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--dim);
  padding: 7px 11px;
  border: 1px solid transparent;
  white-space: nowrap;
  display: flex;
  gap: 6px;
  align-items: center;
  transition: all 0.2s ease;
}

.tab .n { font-size: 9.5px; color: var(--dim); }

.tab:hover {
  color: var(--ink);
  background: rgba(var(--ink-rgb), 0.04);
}

.tab[aria-current="page"] {
  color: var(--ink);
  background: rgba(var(--acc-rgb), 0.07);
  border-color: rgba(var(--ink-rgb), 0.18);
}

.tab[aria-current="page"] .n {
  color: var(--accent);
  font-weight: 500;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: none;
}

.bio-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  padding: 6px 10px;
  border: 1px solid rgba(var(--green-rgb), 0.45);
  background: rgba(var(--green-rgb), 0.08);
  color: var(--green);
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.bio-pill.warn {
  border-color: rgba(var(--amber-rgb), 0.45);
  background: rgba(var(--amber-rgb), 0.08);
  color: var(--amber);
}

.bio-pill.warn .pulse-dot {
  background: var(--amber);
  box-shadow: 0 0 8px var(--amber);
}

.bio-pill.older {
  border-color: rgba(var(--acc-rgb), 0.5);
  background: rgba(var(--acc-rgb), 0.1);
  color: var(--accent);
}

.bio-pill.older .pulse-dot {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.85); }
}

/* ============================================================================
   PAGE CONTAINER & TYPOGRAPHY
   ============================================================================ */
.page {
  max-width: 1380px;
  margin: 0 auto;
  padding: 44px var(--gutter) 96px;
  position: relative;
  z-index: 1;
}

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--dim);
  text-transform: uppercase;
  display: flex;
  gap: 12px;
  align-items: center;
}

.kicker::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
}

h1 {
  font-weight: 200;
  font-size: clamp(38px, 5.2vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  margin: 14px 0 0;
}

h2 {
  font-weight: 300;
  font-size: clamp(25px, 2.8vw, 36px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 10px 0 12px;
}

h3 {
  font-weight: 400;
  font-size: 18.5px;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}

p {
  margin: 0 0 12px;
  color: var(--ink-2);
}

.lead {
  font-size: 16px;
  color: var(--ink-2);
  max-width: 60ch;
  margin-top: 16px;
}

.mt-xs { margin-top: 10px; }
.mt-s { margin-top: 16px; }
.mt-m { margin-top: 26px; }
.mb-m { margin-bottom: 24px; }

/* CAD FRAME WITH SUBTLE + CORNER CROSSHAIRS */
.frame {
  position: relative;
  border: 1px solid var(--faint);
  background: rgba(var(--bg-rgb), 0.84);
}

.frame::before,
.frame::after {
  content: "+";
  position: absolute;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
  opacity: 0.45;
  line-height: 1;
  pointer-events: none;
  z-index: 4;
}

.frame::before { top: -6px; left: -4px; }
.frame::after { bottom: -6px; right: -4px; }

/* CLEAN 3-PILLAR INFORMATION ARCHITECTURE (IA) DIRECTORY */
.ia-architecture {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  background: var(--surface);
}

.ia-pillar {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 20px 24px;
  text-decoration: none;
  color: var(--ink);
  border-inline-end: 1px solid var(--faint);
  transition: background-color 0.2s ease;
}

.ia-pillar:last-child {
  border-inline-end: none;
}

.ia-pillar:hover {
  background: var(--surface-hover);
}

.ia-pillar-num {
  font-size: 10px;
  letter-spacing: 0.14em;
}

.ia-pillar strong {
  font-size: 16.5px;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.ia-pillar span:last-child {
  font-size: 12.5px;
  color: var(--dim);
}

@media (max-width: 860px) {
  .ia-architecture {
    grid-template-columns: minmax(0, 1fr);
  }
  .ia-pillar {
    border-inline-end: none;
    border-bottom: 1px solid var(--faint);
  }
  .ia-pillar:last-child {
    border-bottom: none;
  }
}

/* ============================================================================
   HERO & OPTIONAL BIOMETRIC TELEMETRY PANEL
   ============================================================================ */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 5.8fr) minmax(0, 6.2fr);
  gap: 28px;
  align-items: start;
  margin-bottom: 52px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-right-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.control-panel {
  padding: 20px;
  background: linear-gradient(180deg, rgba(var(--ink-rgb), 0.025), rgba(var(--ink-rgb), 0.005));
}

.control-row {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--faint);
}

.ctrl-label {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--dim);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.ctrl-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.ctrl-head .ctrl-label { margin-bottom: 0; }

.age-readout {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--accent);
  background: rgba(var(--acc-rgb), 0.09);
  padding: 2px 8px;
  font-size: 11px;
  color: var(--accent);
}

#age-input {
  width: 42px;
  background: transparent;
  border: none;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  outline: none;
}

.slider-box {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 10.5px;
  color: var(--dim);
  background: rgba(var(--bg-rgb), 0.85);
  padding: 6px 10px;
  border: 1px solid var(--faint);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: var(--faint);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--accent), 0 0 10px rgba(var(--acc-rgb), 0.6);
  cursor: pointer;
  transition: transform 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Optional Wearable Telemetry Block */
.optional-telemetry {
  padding: 16px 0;
  border-bottom: 1px solid var(--faint);
}

.opt-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.opt-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.opt-sub {
  font-size: 12px;
  color: var(--dim);
  margin: 2px 0 0;
}

.opt-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.opt-item {
  border: 1px solid var(--faint);
  background: rgba(var(--bg-rgb), 0.65);
  padding: 10px 12px;
}

.opt-item-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.opt-scale {
  display: flex;
  justify-content: space-between;
  font-size: 9.5px;
  color: var(--dim);
  margin-top: 5px;
}

.control-footer {
  padding-top: 14px;
}

/* ============================================================================
   BIOLOGICAL AGE ENGINE CARD
   ============================================================================ */
.bio-age-card {
  padding: 22px 24px;
  background:
    radial-gradient(circle at 90% 10%, rgba(var(--green-rgb), 0.08), transparent 55%),
    linear-gradient(180deg, rgba(var(--ink-rgb), 0.03), rgba(var(--ink-rgb), 0.005));
}

.bio-age-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--faint);
}

.bio-age-title-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.bio-age-Title-group h3 {
  margin: 2px 0 0;
}

.bio-age-numbers {
  display: grid;
  grid-template-columns: 1fr auto 1fr 1fr;
  align-items: center;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--faint);
}

.bio-num-block {
  display: flex;
  flex-direction: column;
}

.bio-big-val {
  font-weight: 200;
  font-size: clamp(36px, 4vw, 54px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--green);
  margin-top: 4px;
}

.bio-big-val.warn { color: var(--amber); }
.bio-big-val.older { color: var(--accent); }

.bio-big-val.dim {
  color: var(--ink-2);
}

.bio-big-val small,
.bio-pace-val small {
  font-size: 0.36em;
  letter-spacing: 0.05em;
  color: var(--dim);
  margin-left: 4px;
}

.bio-vs-divider {
  font-size: 11px;
  color: var(--dim);
  padding: 4px 8px;
  border: 1px solid var(--faint);
}

.pace-block {
  border-left: 1px solid var(--faint);
  padding-left: 16px;
}

.bio-pace-val {
  font-weight: 200;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1;
  color: var(--ink);
  margin-top: 4px;
}

/* Bio Spectrum Bar */
.bio-spectrum {
  padding: 14px 0;
  border-bottom: 1px solid var(--faint);
}

.bio-spectrum-labels {
  display: flex;
  justify-content: space-between;
  font-size: 9.5px;
  color: var(--dim);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.bio-spectrum-track {
  position: relative;
  height: 8px;
  background: linear-gradient(90deg, rgba(var(--green-rgb), 0.35) 0%, rgba(var(--ink-rgb), 0.1) 50%, rgba(var(--acc-rgb), 0.4) 100%);
  border: 1px solid var(--faint);
}

.bio-spectrum-center {
  position: absolute;
  left: 50%;
  top: -3px;
  bottom: -3px;
  width: 2px;
  background: var(--ink);
}

.bio-spectrum-marker {
  position: absolute;
  top: -5px;
  width: 10px;
  height: 16px;
  background: var(--green);
  border: 2px solid var(--bg);
  box-shadow: 0 0 10px var(--green);
  transform: translateX(-50%);
  transition: left 0.35s var(--ease-out), background-color 0.35s ease;
}

/* 4 Bio Drivers Breakdown */
.bio-drivers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding-top: 14px;
}

.bio-driver-item {
  font-size: 11.5px;
  padding: 8px 10px;
  border: 1px solid var(--hair);
  background: rgba(var(--bg-rgb), 0.5);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.bio-driver-item .drv-name {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--dim);
}

.bio-driver-item .drv-impact {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
}

/* CHIPS & TAGS */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: transparent;
  color: var(--dim);
  border: 1px solid var(--faint);
  padding: 7px 11px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.chip:hover {
  color: var(--ink);
  border-color: var(--dim);
}

.chip[aria-pressed="true"],
.chip.on {
  color: var(--bg);
  background: var(--ink);
  border-color: var(--ink);
}

.chip.accent[aria-pressed="true"],
.chip.accent.on {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
  font-weight: 500;
}

.tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--faint);
  padding: 3px 8px;
  color: var(--dim);
  display: inline-block;
}

.tag.red {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: rgba(var(--acc-rgb), 0.08);
}

.tag.green {
  color: var(--green);
  border-color: rgba(var(--green-rgb), 0.35);
  background: rgba(var(--green-rgb), 0.08);
}

/* ============================================================================
   HAIRLINE GRIDS & STAT CELLS
   ============================================================================ */
.grid {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--faint);
  border-inline-start: 1px solid var(--faint);
}

.grid > * {
  background: var(--bg);
  border-inline-end: 1px solid var(--faint);
  border-bottom: 1px solid var(--faint);
}

.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.g5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }

.cell {
  padding: 22px;
  position: relative;
  transition: background-color 0.2s ease;
}

.cell:hover {
  background: var(--surface-hover);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat .stat-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.stat .stat-code {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.stat .v {
  font-weight: 200;
  font-size: clamp(30px, 3.2vw, 44px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.stat .v small {
  font-size: 0.42em;
  letter-spacing: 0;
  color: var(--dim);
  margin-inline-start: 4px;
}

.stat .k {
  font-size: 12.5px;
  color: var(--dim);
  border-top: 1px solid var(--faint);
  padding-top: 8px;
  margin-top: 8px;
}

/* ============================================================================
   HERO CAD STAGE
   ============================================================================ */
.hero-stage {
  position: relative;
  min-height: 440px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 45%, rgba(var(--acc-rgb), 0.06), transparent 65%),
    var(--surface);
}

.scan {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(var(--acc-rgb), 0.6), transparent);
  animation: scanline 5.5s linear infinite;
  pointer-events: none;
  z-index: 2;
}

@keyframes scanline {
  0% { top: 6%; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { top: 92%; opacity: 0; }
}

.pulse-node {
  animation: nodePulse 2.4s ease-in-out infinite;
}

@keyframes nodePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hud-ring {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hud-ring svg { width: 100%; height: 100%; }

.hero-mode {
  position: absolute;
  top: 12px;
  left: 14px;
  z-index: 3;
}

.hero-coords {
  position: absolute;
  top: 12px;
  right: 14px;
  text-align: right;
  font-size: 10px;
  color: var(--dim);
  letter-spacing: 0.1em;
  line-height: 1.5;
  z-index: 3;
}

.cad-canvas {
  width: 100%;
  padding: 40px 14px 38px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cad-svg {
  max-height: 390px;
  width: 100%;
}

.hero-spec {
  position: absolute;
  left: 14px;
  bottom: 12px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--dim);
  letter-spacing: 0.08em;
  line-height: 1.6;
  pointer-events: none;
}

.hero-spec b { color: var(--ink); font-weight: 400; }

/* SVG LINEART CLASSES */
svg.lineart {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

svg.lineart text {
  font-family: var(--mono);
  fill: var(--dim);
  font-size: 10px;
  letter-spacing: 0.06em;
}

svg.lineart text.ink { fill: var(--ink); font-weight: 500; }
svg.lineart .ln { fill: none; stroke: var(--ink); stroke-width: 1; vector-effect: non-scaling-stroke; }
svg.lineart .ln2 { fill: none; stroke: var(--dim); stroke-width: 1; vector-effect: non-scaling-stroke; }
svg.lineart .ln3 { fill: none; stroke: var(--faint); stroke-width: 1; vector-effect: non-scaling-stroke; }
svg.lineart .dash { fill: none; stroke: var(--dim); stroke-width: 1; stroke-dasharray: 3 4; vector-effect: non-scaling-stroke; }
svg.lineart .acc { fill: none; stroke: var(--accent); stroke-width: 1.4; vector-effect: non-scaling-stroke; }
svg.lineart .accf { fill: var(--accent); stroke: none; }
svg.lineart .s-bold { fill: none; stroke: var(--ink); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; transition: d 0.35s ease; }
svg.lineart .s-med { fill: none; stroke: var(--ink-2); stroke-width: 1; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
svg.lineart .s-dim { fill: none; stroke: var(--dim); stroke-width: 0.9; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
svg.lineart .s-faint { fill: none; stroke: var(--faint); stroke-width: 0.75; vector-effect: non-scaling-stroke; }

/* MARQUEE */
.marquee {
  overflow: hidden;
  border-top: 1px solid var(--faint);
  border-bottom: 1px solid var(--faint);
  padding: 15px 0;
  margin-bottom: 20px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.marquee .row {
  display: flex;
  gap: 44px;
  width: max-content;
  will-change: transform;
  animation: marq 55s linear infinite;
}

.marquee .row > span {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
  letter-spacing: 0.1em;
  white-space: nowrap;
}

@keyframes marq { to { transform: translateX(-50%); } }

/* ============================================================================
   NUMBERED SECTIONS (.sec)
   ============================================================================ */
.sec {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 0 28px;
  padding: 56px 0;
  border-top: 1px solid var(--faint);
  position: relative;
  content-visibility: auto;
  contain-intrinsic-size: auto 720px;
}

.sec > .sec-n {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--dim);
  position: relative;
  padding-inline-start: 14px;
}

.sec > .sec-n::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 0;
  width: 8px;
  border: 1px solid var(--faint);
  border-inline-end: none;
}

.sec-title {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 32px;
  align-items: end;
  margin-bottom: 28px;
}

.sec-title p { margin: 0; }

/* ============================================================================
   SECTION 02: INTERACTIVE LONGEVITY GRAPHS
   ============================================================================ */
.chart-frame {
  padding: 22px;
  background: var(--surface);
}

.chart-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--faint);
  margin-bottom: 18px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-2);
  letter-spacing: 0.06em;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend i {
  width: 12px;
  height: 3px;
  display: inline-block;
}

.chart-stage {
  position: relative;
  min-height: 340px;
}

.chart-footer-readout {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--faint);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.chart-Readout-box {
  padding: 12px 14px;
  border: 1px solid var(--faint);
  background: rgba(var(--bg-rgb), 0.65);
}

.chart-Readout-box .mono-lbl {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--dim);
  letter-spacing: 0.08em;
  display: block;
}

.chart-Readout-box .mono-val {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--ink);
  font-weight: 500;
  margin-top: 4px;
  display: block;
}

/* ============================================================================
   SECTION 03: FASTING & AUTOPHAGY SIMULATOR
   ============================================================================ */
.fasting-sim {
  padding: 24px;
  background: var(--surface);
}

.fasting-controls {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--faint);
}

.fasting-split {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 24px;
  padding-top: 22px;
  align-items: center;
}

.fasting-cell-box {
  border: 1px solid var(--faint);
  background: rgba(var(--bg-rgb), 0.7);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.cell-diagram-wrap {
  border-bottom: 1px solid var(--faint);
  padding-bottom: 12px;
}

/* Explanation Cards with iOS Icons */
.exp-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
}

.exp-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.exp-card h3 {
  font-size: 19px;
  font-weight: 400;
  margin: 6px 0 6px;
}

.exp-card p {
  font-size: 13.5px;
  color: var(--ink-2);
  margin: 0;
}

.exp-meta {
  border-top: 1px solid var(--faint);
  padding-top: 10px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.06em;
}

/* ============================================================================
   SECTION 04: PROTEIN & mTOR DASHBOARD
   ============================================================================ */
.protein-dashboard {
  background: var(--surface);
}

.protein-wave-split {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 24px;
  padding: 24px;
  align-items: center;
}

.protein-sources-panel {
  border: 1px solid var(--faint);
  background: rgba(var(--bg-rgb), 0.75);
  padding: 20px;
}

/* ============================================================================
   SECTION 05: KARVONEN HR ZONES & HEAVY LIFTING BENCHMARKS
   ============================================================================ */
.hr-zones-frame,
.lifting-frame {
  background: var(--surface);
}

.hr-zones-head {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.zone-cell {
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
}

.zone-bpm {
  font-weight: 200;
  font-size: clamp(24px, 2.5vw, 34px);
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1.1;
}

/* ============================================================================
   SECTION 06: ORGAN SYSTEMS & PROTOCOLS
   ============================================================================ */
.note {
  border: 1px solid var(--faint);
  border-inline-start: 2px solid var(--accent);
  padding: 15px 18px;
  font-size: 14px;
  color: var(--ink-2);
  background: rgba(var(--acc-rgb), 0.04);
}

.note b {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 500;
  margin-right: 8px;
}

.sys-explorer {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
}

.sys-tabs {
  border-inline-end: 1px solid var(--faint);
  display: flex;
  flex-direction: column;
}

.sys-tab-btn {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  gap: 8px;
  align-items: center;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--faint);
  color: var(--ink-2);
  padding: 16px 18px;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 300;
  transition: background 0.18s ease, color 0.18s ease;
}

.sys-tab-btn:last-child { border-bottom: none; }
.sys-tab-btn .n { font-family: var(--mono); font-size: 10.5px; color: var(--dim); }
.sys-tab-btn .sys-tag { font-family: var(--mono); font-size: 9.5px; color: var(--dim); text-transform: uppercase; letter-spacing: 0.08em; }
.sys-tab-btn:hover { background: var(--surface-hover); color: var(--ink); }

.sys-tab-btn.active {
  background: rgba(var(--acc-rgb), 0.08);
  color: var(--ink);
  border-inline-start: 2px solid var(--accent);
}

.sys-tab-btn.active .n,
.sys-tab-btn.active .sys-tag { color: var(--accent); }

.sys-detail {
  padding: 26px 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
}

.sys-detail-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  border-bottom: 1px solid var(--faint);
  padding-bottom: 16px;
}

.sys-detail-head .pn {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: 6px;
}

.sys-detail-head h3 { font-size: 23px; font-weight: 300; margin: 0; }

.sys-why {
  font-size: 13.5px;
  color: var(--ink);
  border-top: 1px solid var(--faint);
  padding-top: 14px;
}

.sys-why::before {
  content: "CLINICAL ACTION PROTOCOL — ";
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.protocol-card {
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.protocol-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.protocol-top .n {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.protocol-sub {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}

.arrow-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.arrow-list li {
  font-size: 13.8px;
  color: var(--ink-2);
  padding-left: 20px;
  position: relative;
}

.arrow-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--mono);
  color: var(--accent);
}

.arrow-list li strong { color: var(--ink); font-weight: 500; }

/* ============================================================================
   TABLE & CHECKLIST
   ============================================================================ */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--faint);
  background: var(--bg);
}

table.t {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

table.t th {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--faint);
  background: rgba(var(--ink-rgb), 0.02);
}

table.t td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--hair);
  vertical-align: top;
  color: var(--ink-2);
}

table.t tr:last-child td { border-bottom: none; }
table.t td:first-child { font-family: var(--mono); font-size: 11px; color: var(--accent); white-space: nowrap; }
table.t td:nth-child(2) { color: var(--ink); font-weight: 400; }
table.t td:nth-child(3) { font-family: var(--mono); font-size: 12px; color: var(--green); white-space: nowrap; }
table.t td:nth-child(4) { font-family: var(--mono); font-size: 11.5px; color: var(--dim); white-space: nowrap; }

.checklist-bar {
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.checklist-meta { display: flex; align-items: center; gap: 14px; }

.check-cell {
  padding: 20px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  user-select: none;
}

.check-cell.done { background: rgba(var(--green-rgb), 0.06); }
.check-cell-top { display: flex; justify-content: space-between; align-items: center; }
.check-code { font-family: var(--mono); font-size: 10.5px; color: var(--dim); letter-spacing: 0.1em; }
.check-box-indicator { font-family: var(--mono); font-size: 11px; padding: 2px 8px; border: 1px solid var(--faint); color: var(--dim); }
.check-cell.done .check-box-indicator { border-color: var(--green); color: var(--green); background: rgba(var(--green-rgb), 0.12); }
.check-cell h3 { font-size: 16.5px; font-weight: 400; margin: 0 0 4px; }
.check-cell p { font-family: var(--mono); font-size: 11.5px; color: var(--dim); margin: 0; }

/* FOOTER */
.foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 24px var(--gutter);
  border-top: 1px solid var(--faint);
  font-size: 12px;
  color: var(--dim);
}

.foot-credit {
  flex: 1 0 100%;
  margin: 8px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--hair);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: center;
  color: var(--dim);
}

.foot-credit::before { content: "● "; color: var(--accent); }

/* RESPONSIVE */
@media (max-width: 1120px) {
  .hero,
  .fasting-split,
  .protein-wave-split {
    grid-template-columns: minmax(0, 1fr);
  }
  .g5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .chart-footer-readout { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sys-explorer { grid-template-columns: minmax(0, 1fr); }
  .sys-tabs {
    border-inline-end: none;
    border-bottom: 1px solid var(--faint);
    flex-direction: row;
    overflow-x: auto;
  }
  .sys-tab-btn {
    border-bottom: none;
    border-inline-end: 1px solid var(--faint);
    min-width: 195px;
  }
}

@media (max-width: 780px) {
  .sec { grid-template-columns: minmax(0, 1fr); padding: 36px 0; }
  .sec > .sec-n { margin-bottom: 12px; }
  .sec-title,
  .control-row,
  .opt-grid,
  .bio-age-numbers,
  .bio-drivers,
  .g2, .g3, .g4, .g5 {
    grid-template-columns: minmax(0, 1fr);
  }
  .bio-pill { display: none; }
}

@media print {
  .topbar, .marquee, .fx-glow, .hero-mode { display: none !important; }
  body { background: #fff; color: #000; }
}


/* ============================================================================
   TRUE APPLE iOS SUPERELLIPSE SQUIRCLE SVG ICONS (.ios)
   ============================================================================ */
.ios {
  display: inline-block;
  width: var(--s, 44px);
  height: var(--s, 44px);
  flex: none;
  vertical-align: middle;
  contain: layout style;
  transition: transform 0.25s var(--ease-out);
}

.ios svg {
  display: block;
  width: 100%;
  height: 100%;
}

.ios-tile {
  stroke: rgba(255, 255, 255, 0.22);
  stroke-width: 1;
}

.ios-shine {
  fill: rgba(255, 255, 255, 0.18);
  pointer-events: none;
}

.ios-glyph {
  fill: none;
  stroke: #ffffff;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cell:hover .ios,
.topic-card:hover .ios {
  transform: translateY(-2px) scale(1.05);
}

/* ============================================================================
   SECTION 02: AI-WORLD-2050 STYLE ACTION PLAYBOOK MATRIX
   ============================================================================ */
.advice-col {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.advice-col-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--faint);
}

.advice-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.advice-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 13.8px;
  color: var(--ink-2);
  line-height: 1.5;
}

.advice-list li strong {
  color: var(--ink);
  font-weight: 500;
}

.week-step-box {
  margin-top: auto;
  border: 1px solid rgba(var(--acc-rgb), 0.45);
  background: rgba(var(--acc-rgb), 0.06);
  padding: 14px 16px;
}

.week-step-box .ctrl-label {
  color: var(--accent);
  margin-bottom: 4px;
}

.week-step-box p {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink);
}

/* ============================================================================
   SECTION 07: ESSENTIAL-LAWS STYLE 12 TOPIC CARDS (.topic-dir & .topic-card)
   ============================================================================ */
.topic-dir {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.topic-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 22px 22px 20px;
  background: var(--surface);
  border: 1px solid var(--faint);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: background-color 0.25s ease, transform 0.25s var(--ease-out), border-color 0.25s ease;
}

.topic-card:hover {
  background: var(--surface-hover);
  transform: translateY(-3px);
  border-color: rgba(var(--acc-rgb), 0.55);
}

.tc-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.tc-top .tx {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.12em;
}

.topic-card h3 {
  font-size: 20px;
  font-weight: 400;
  margin: 0 0 6px;
}

.tc-tag {
  font-size: 13px;
  color: var(--dim);
  margin: 0 0 16px;
  line-height: 1.45;
}

.tc-ch {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
  border-top: 1px solid var(--hair);
  padding-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.tc-ch li {
  font-size: 12.5px;
  color: var(--ink-2);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tc-ch li b {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent);
  width: 18px;
  height: 18px;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(var(--acc-rgb), 0.35);
  background: rgba(var(--acc-rgb), 0.06);
  flex: none;
}

.tc-foot {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--faint);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--dim);
}

.tc-foot .acc {
  color: var(--accent);
  transition: transform 0.2s ease;
}

.topic-card:hover .tc-foot .acc {
  transform: translateX(4px);
}

/* ============================================================================
   SECTION 08: SCIENCE OR MYTH INTERACTIVE CARDS
   ============================================================================ */
.quiz-toolbar-frame {
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.myth-card {
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
}

.myth-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.verdict-pill {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  padding: 3px 9px;
  border: 1px solid var(--faint);
  font-weight: 500;
}

.verdict-pill.SCIENCE {
  color: var(--green);
  border-color: rgba(var(--green-rgb), 0.45);
  background: rgba(var(--green-rgb), 0.09);
}

.verdict-pill.MYTH {
  color: var(--crimson);
  border-color: rgba(var(--crimson-rgb), 0.45);
  background: rgba(var(--crimson-rgb), 0.09);
}

.verdict-pill.NUANCED {
  color: var(--amber);
  border-color: rgba(var(--amber-rgb), 0.45);
  background: rgba(var(--amber-rgb), 0.09);
}

.myth-card h3 {
  font-size: 17px;
  font-weight: 400;
  line-height: 1.35;
  margin: 4px 0;
}

.myth-cite {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--dim);
  border-top: 1px solid var(--hair);
  padding-top: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

/* ============================================================================
   MODALS (DEEP-DIVE DOSSIER & INSTANT SEARCH)
   ============================================================================ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-backdrop[hidden] {
  display: none !important;
}

.modal-panel {
  width: 100%;
  max-width: 920px;
  max-height: 86vh;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.75);
}

.modal-head {
  padding: 20px 24px;
  border-bottom: 1px solid var(--faint);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: var(--surface);
}

.modal-head-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.chapter-block {
  border: 1px solid var(--faint);
  background: var(--surface);
  padding: 18px 20px;
}

.chapter-block-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.chapter-block h4 {
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 400;
  color: var(--ink);
  margin: 0;
}

.chapter-cite {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--accent);
}

/* Search Modal */
.search-panel {
  max-width: 720px;
}

.search-bar-top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--faint);
  background: var(--surface);
}

#search-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  outline: none;
}

.search-results {
  max-height: 65vh;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.search-hit {
  padding: 12px 16px;
  border: 1px solid var(--faint);
  background: var(--surface);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.search-hit:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
}

@media (max-width: 1080px) {
  .topic-dir {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .topic-dir {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ============================================================================
   SEMANTIC CLINICAL FAQ ACCORDION (#longevity-faq)
   ============================================================================ */
.mb-s { margin-bottom: 14px; }

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background: var(--surface);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.faq-item[open] {
  border-color: rgba(var(--acc-rgb), 0.45);
}

.faq-q {
  padding: 16px 20px;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 400;
  color: var(--ink);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  user-select: none;
}

.faq-q::-webkit-details-marker {
  display: none;
}

.faq-q::after {
  content: "+";
  margin-inline-start: auto;
  font-family: var(--mono);
  color: var(--accent);
  font-size: 16px;
}

.faq-item[open] .faq-q::after {
  content: "−";
}

.faq-a {
  padding: 0 20px 18px;
  font-size: 13.8px;
  color: var(--ink-2);
  line-height: 1.6;
  border-top: 1px solid var(--hair);
  padding-top: 14px;
}

/* ============================================================================
   LINEAR TELEMETRY ANIMATIONS, WAVEFORMS & CARD SCHEMATICS
   ============================================================================ */
.bio-spectrum-marker {
  transition: left 0.45s var(--ease-out), background-color 0.3s ease, box-shadow 0.3s ease;
}

.bio-driver-item {
  flex-direction: column;
  align-items: stretch !important;
  gap: 6px;
}

.bio-driver-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.drv-bar-track {
  height: 3px;
  background: rgba(var(--ink-rgb), 0.08);
  position: relative;
  overflow: hidden;
}

.drv-bar-fill {
  height: 100%;
  transition: width 0.45s var(--ease-out);
}

#advice-lifespan-schematic {
  padding: 16px 22px 14px;
  background: var(--surface);
}

#advice-lifespan-schematic svg {
  display: block;
  width: 100%;
  height: auto;
}

.exp-card-viz,
.zone-wave-viz,
.tc-viz,
.sys-viz,
.modal-viz {
  margin-top: 14px;
  border: 1px solid var(--hair);
  background: rgba(var(--ink-rgb), 0.015);
  padding: 10px 12px;
  overflow: hidden;
}

.tc-viz {
  margin: 0 0 16px;
}

.sys-viz {
  margin-top: 4px;
  padding: 14px 16px;
}

.modal-viz {
  margin: 0 0 10px;
  padding: 16px 18px;
}

.exp-card-viz svg,
.zone-wave-viz svg,
.tc-viz svg,
.sys-viz svg,
.modal-viz svg {
  display: block;
  width: 100%;
  height: auto;
}

@keyframes dashFlow {
  to {
    stroke-dashoffset: -28;
  }
}

.flow-dash {
  stroke-dasharray: 5 4;
  animation: dashFlow 1.8s linear infinite;
}

@keyframes drawLine {
  from {
    stroke-dashoffset: 900;
  }
  to {
    stroke-dashoffset: 0;
  }
}

.draw-line {
  stroke-dasharray: 900;
  animation: drawLine 1.1s var(--ease-out) forwards;
}

/* ============================================================================
   TIDY STEP-BY-STEP TOOL HEADERS, PLAIN-ENGLISH BANNERS & HELPER SUBTITLES
   ============================================================================ */
.tool-step-header {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.step-badge {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 8px;
  background: rgba(var(--acc-rgb), 0.12);
  border: 1px solid rgba(var(--acc-rgb), 0.45);
  color: var(--accent);
  font-weight: 500;
}

.step-badge.optional {
  background: rgba(var(--blue-rgb), 0.1);
  border-color: rgba(var(--blue-rgb), 0.4);
  color: var(--blue);
}

.step-title {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.step-hint {
  margin-inline-start: auto;
  font-size: 9.5px;
  color: var(--dim);
  letter-spacing: 0.1em;
}

.opt-helper {
  display: block;
  font-size: 11.5px;
  color: var(--dim);
  margin: -2px 0 8px;
  line-height: 1.35;
}

.tool-plain-banner {
  border-top: 1px solid var(--faint);
  background: rgba(var(--green-rgb), 0.04);
  padding: 12px 18px;
  margin-top: 14px;
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.5;
}

.tool-plain-banner strong {
  color: var(--ink);
  font-weight: 500;
}

/* Collapsible Smartwatch Drawer in Hero */
.opt-drawer {
  margin-top: 14px;
  border-top: 1px solid var(--faint);
  padding-top: 12px;
}

.opt-drawer-summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  padding: 6px 4px;
  user-select: none;
  transition: opacity 0.18s ease;
}

.opt-drawer-summary::-webkit-details-marker {
  display: none;
}

.opt-drawer-summary:hover {
  opacity: 0.9;
}

.opt-drawer-body {
  padding-top: 14px;
  margin-top: 10px;
  border-top: 1px dashed var(--faint);
}

/* Compact 4-Pill Bio-Age Drivers Row */
.bio-drivers-compact {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--faint);
}

.bio-drv-pill {
  border: 1px solid var(--faint);
  background: rgba(var(--bg-rgb), 0.55);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.bio-drv-pill .lbl {
  font-family: var(--mono);
  font-size: 9.5px;
  color: var(--dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.bio-drv-pill .val {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
}

/* Collapsible Deep-Dive Science Drawers under Tools */
.tool-drawer {
  border: 1px solid var(--faint);
  background: var(--surface);
}

.tool-drawer-summary {
  list-style: none;
  padding: 13px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 400;
  color: var(--ink-2);
  user-select: none;
  transition: background 0.18s ease, color 0.18s ease;
}

.tool-drawer-summary::-webkit-details-marker {
  display: none;
}

.tool-drawer-summary:hover {
  background: var(--surface-hover);
  color: var(--ink);
}

.tool-drawer[open] .tool-drawer-summary {
  border-bottom: 1px solid var(--faint);
  color: var(--ink);
}

.tool-drawer-body {
  padding: 18px;
}

.fasting-inline-note {
  margin-top: 16px;
}

.training-unified-frame,
.labs-unified-frame {
  padding: 22px 24px;
}

.training-unified-frame .hr-zones-head {
  padding: 14px 4px 16px;
}

.fasting-practical-bar {
  margin-top: 16px;
}

.fasting-practical-bar .cell {
  padding: 14px 18px;
}

.zone-meta-list {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--hair);
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12px;
  color: var(--ink-2);
}

.zone-meta-list span {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.zone-meta-list b {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--dim);
  font-weight: 400;
  text-transform: uppercase;
}

.meal-builder-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.meal-card-item {
  border: 1px solid var(--faint);
  background: rgba(var(--bg-rgb), 0.6);
  padding: 11px 13px;
  font-size: 12.8px;
  line-height: 1.45;
}

.meal-card-item strong {
  display: block;
  color: var(--ink);
  font-weight: 500;
  margin-bottom: 3px;
}

/* ============================================================================
   UNIFIED 4-TOOL STUDIO SWITCHER & HIGH-PERFORMANCE RENDERING RULES
   ============================================================================ */
.sec {
  content-visibility: auto;
  contain-intrinsic-size: auto 560px;
}

.scan {
  display: none !important;
}

.pulse-node,
.flow-dash {
  animation: none !important;
}

.tool-studio-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 0;
  overflow: hidden;
}

.tool-studio-btn {
  appearance: none;
  background: transparent;
  border: none;
  border-inline-end: 1px solid var(--faint);
  padding: 16px 20px;
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-family: var(--sans);
  color: var(--ink-2);
  transition: background 0.16s ease, color 0.16s ease;
}

.tool-studio-btn:last-child {
  border-inline-end: none;
}

.tool-studio-btn:hover {
  background: var(--surface-hover);
  color: var(--ink);
}

.tool-studio-btn.on {
  background: rgba(var(--acc-rgb), 0.08);
  color: var(--ink);
  box-shadow: inset 0 -2px 0 var(--accent);
}

.tool-studio-num {
  font-size: 9.5px;
  letter-spacing: 0.12em;
}

.tool-studio-btn strong {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
}

.tool-studio-btn span:last-child {
  font-size: 11.8px;
  color: var(--dim);
  line-height: 1.35;
}

/* ============================================================================
   CLEAN SYMMETRICAL FIRST FOLD (ZERO EMPTY SPACE 3-ROW LAYOUT)
   ============================================================================ */
.page {
  padding-top: 22px !important;
}

.hero {
  display: flex !important;
  flex-direction: column !important;
  gap: 16px !important;
  margin-bottom: 42px !important;
}

.hero-header-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  gap: 18px;
  align-items: stretch;
}

.hero-intro-block {
  border: 1px solid var(--faint);
  background: var(--surface);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}

.hero-header-bar h1 {
  font-size: clamp(30px, 3.3vw, 46px);
  line-height: 1.05;
  margin: 4px 0 0;
}

.hero-header-bar .lead {
  margin: 4px 0 0;
  font-size: 13.8px;
  line-height: 1.5;
  color: var(--ink-2);
  max-width: none;
}

.hero-header-bar .bio-age-card {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-header-bar .bio-age-top {
  padding-bottom: 10px;
}

.hero-header-bar .bio-age-numbers {
  padding: 10px 0;
}

.hero-header-bar .bio-big-val {
  font-size: clamp(28px, 2.8vw, 38px);
}

.hero-header-bar .bio-pace-val {
  font-size: clamp(22px, 2.2vw, 30px);
}

.hero-header-bar .bio-spectrum {
  padding: 8px 0 4px;
  border-bottom: none;
}

.hero-header-bar .bio-drivers-compact {
  margin-top: 6px;
  padding-top: 8px;
}

.hero-main-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  gap: 18px;
  align-items: stretch;
}

.hero-main-grid .control-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 18px 22px;
}

.hero-main-grid .hero-stage {
  min-height: 380px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-main-grid .cad-canvas {
  padding: 36px 10px 30px;
  flex: 1;
}

.hero-main-grid .cad-svg {
  max-height: 350px;
  width: 100%;
}

.hero-metrics-strip {
  width: 100%;
}

.hero-metrics-strip .cell.stat {
  padding: 16px 20px;
}

@media (max-width: 960px) {
  .hero-header-bar,
  .hero-main-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero-metrics-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .tool-studio-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .tool-studio-btn:nth-child(1),
  .tool-studio-btn:nth-child(2) {
    border-bottom: 1px solid var(--faint);
  }
}

@media (max-width: 780px) {
  .bio-drivers-compact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .hero-metrics-strip,
  .tool-studio-bar,
  .meal-builder-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .tool-studio-btn {
    border-inline-end: none;
    border-bottom: 1px solid var(--faint);
  }
  .tool-studio-btn:last-child {
    border-bottom: none;
  }
}