/* =====================================================================
 * SPACESENSE — landing.css
 * Standalone styles for landing.html. Light theme by design; deliberate
 * contrast against the dark tool (index.html). No webfont dependency.
 *
 * Palette
 *   --ls-bg            page background, slightly cool near-white
 *   --ls-surface       cards
 *   --ls-surface-2     sectional bands
 *   --ls-ink           primary text, near-black navy
 *   --ls-muted         secondary text
 *   --ls-low           tertiary text (footer meta, scroll cue, captions)
 *   --ls-navy / -deep  brand navy
 *   --ls-yellow        brand yellow (decorative use, ≥3:1 against bg)
 *   --ls-yellow-text   deepened yellow for small-text uses (WCAG AA)
 *   --ls-yellow-soft   washed yellow for highlights / callouts
 *   --ls-yellow-strong stronger wash for headline highlighter
 *   --ls-line          borders / dividers
 *
 * Token discipline: every declaration that takes a colour, radius,
 * shadow, font-size, or easing pulls from a token below — no ad-hoc
 * values in component blocks. New tokens go up here.
 * ===================================================================== */

:root{
  /* Color */
  --ls-bg:            #F6F8FB;
  --ls-surface:       #FFFFFF;
  --ls-surface-2:     #FAFCFE;
  --ls-ink:           #0F1923;
  --ls-muted:         #5C6F80;
  --ls-low:           #8093A4;
  --ls-navy:          #3F5A6C;
  --ls-navy-deep:     #2E4456;
  --ls-yellow:        #F2C12E;
  --ls-yellow-text:   #8A6F0F;     /* WCAG-compliant on white for small text */
  --ls-yellow-soft:   #FEF5D6;
  --ls-yellow-strong: rgba(242,193,46,0.42);
  --ls-line:          #E2E8F0;
  --ls-line-2:        #EEF2F6;

  /* Type scale */
  --fs-display:  clamp(40px, 6.4vw, 88px);
  --fs-h2:       clamp(28px, 3.6vw, 44px);
  --fs-h2-cta:   clamp(28px, 3.8vw, 44px);
  --fs-h3:       26px;
  --fs-lede:     19px;
  --fs-body:     17px;
  --fs-body-sm:  15px;
  --fs-body-xs:  14px;
  --fs-meta:     13px;
  --fs-eyebrow:  11px;
  --fs-tag:      10px;
  --fs-kpi:      clamp(40px, 4.8vw, 64px);
  --fs-stat:     clamp(40px, 5.2vw, 64px);
  --fs-pullq:    clamp(24px, 3.6vw, 44px);
  --fs-quick:    clamp(34px, 3.6vw, 48px);

  /* Radii / shadows */
  --ls-radius-lg:  18px;
  --ls-radius-md:  12px;
  --ls-radius-sm:  8px;
  --ls-shadow-sm:  0 2px 6px rgba(15,25,35,0.04), 0 1px 2px rgba(15,25,35,0.04);
  --ls-shadow-md:  0 6px 18px rgba(15,25,35,0.06), 0 2px 6px rgba(15,25,35,0.04);
  --ls-shadow-lg:  0 16px 40px rgba(15,25,35,0.10), 0 4px 12px rgba(15,25,35,0.06);
  --ls-shadow-yellow-sm: 0 6px 18px rgba(242,193,46,0.32), inset 0 1px 0 rgba(255,255,255,0.32);
  --ls-shadow-yellow-md: 0 10px 26px rgba(242,193,46,0.45), inset 0 1px 0 rgba(255,255,255,0.32);

  /* Card padding tokens (two tiers) */
  --ls-pad-card-md: 28px;
  --ls-pad-card-lg: 36px;

  /* Section padding */
  --ls-pad-section: 104px;
  --ls-pad-section-tight: 64px;

  /* Stack ceiling for figure / table widths */
  --ls-w-content:   1240px;
  --ls-w-text:      66ch;

  /* Easing */
  --ls-ease:       cubic-bezier(.22,.61,.36,1);

  /* Fonts */
  --ff-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --ff-mono: "SF Mono", Menlo, Consolas, monospace;
  --ff-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Georgia", serif;
}

* { box-sizing: border-box; }

html, body{
  margin: 0;
  padding: 0;
  background: var(--ls-bg);
  color: var(--ls-ink);
  font-family: var(--ff-sans);
  font-size: var(--fs-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

a { color: inherit; text-decoration: none; }
em { font-style: italic; color: var(--ls-navy); }
sup { font-size: 0.7em; line-height: 0; vertical-align: super; }
sup a { color: var(--ls-navy); font-weight: 600; text-decoration: none; }
sup a:hover { color: var(--ls-ink); text-decoration: underline; }

code{
  font-family: var(--ff-mono);
  font-size: 0.92em;
  padding: 1px 6px;
  background: rgba(63,90,108,0.08);
  border-radius: 4px;
  color: var(--ls-navy-deep);
}

/* Scroll anchor offset — fixes sticky-nav anchor jumps */
section[id]{ scroll-margin-top: 80px; }

/* Universal focus ring */
:focus-visible{
  outline: 2px solid var(--ls-navy);
  outline-offset: 3px;
  border-radius: 4px;
}
.ls-cta-primary:focus-visible,
.ls-cta-small:focus-visible{
  outline-color: var(--ls-navy-deep);
  outline-offset: 4px;
}

/* Skip link */
.ls-skip{
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--ls-yellow);
  color: var(--ls-navy-deep);
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 14px;
  z-index: 1000;
  transition: top 0.16s var(--ls-ease);
}
.ls-skip:focus{ top: 12px; }

.ls-visually-hidden{
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ────────────────── Sticky nav ────────────────── */

.ls-nav{
  position: sticky; top: 0; z-index: 100;
  background: rgba(246,248,251,0.86);
  border-bottom: 1px solid var(--ls-line);
  transition: background 0.18s var(--ls-ease), box-shadow 0.18s var(--ls-ease), border-color 0.18s var(--ls-ease);
}
.ls-nav.is-scrolled{
  background: rgba(255,255,255,0.92);
  box-shadow: var(--ls-shadow-sm);
  border-bottom-color: transparent;
}
@supports (backdrop-filter: blur(10px)){
  .ls-nav{
    background: rgba(246,248,251,0.72);
    backdrop-filter: blur(10px) saturate(120%);
    -webkit-backdrop-filter: blur(10px) saturate(120%);
  }
  .ls-nav.is-scrolled{
    background: rgba(255,255,255,0.78);
  }
}

.ls-nav-inner{
  max-width: var(--ls-w-content);
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.ls-brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}
.ls-brand-mark{ display: inline-flex; align-items: center; }
.ls-brand-wordmark{
  font-size: 17px;
  letter-spacing: 0.10em;
  color: var(--ls-ink);
}
.ls-nav-links{
  display: flex;
  gap: 22px;
  margin-left: auto;
  margin-right: 18px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.ls-nav-links::-webkit-scrollbar{ display: none; }
.ls-nav-links a{
  position: relative;
  font-size: 14px;
  color: var(--ls-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 4px 2px;
  transition: color 0.16s var(--ls-ease);
  white-space: nowrap;
}
.ls-nav-links a::after{
  content: "";
  position: absolute;
  left: 2px; right: 2px;
  bottom: 0;
  height: 2px;
  background: var(--ls-yellow);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ls-ease);
  border-radius: 1px;
}
.ls-nav-links a:hover{ color: var(--ls-ink); }
.ls-nav-links a:hover::after{ transform: scaleX(1); }
.ls-nav-links a[aria-current="true"]{ color: var(--ls-ink); }
.ls-nav-links a[aria-current="true"]::after{ transform: scaleX(1); }

.ls-cta-small{
  flex-shrink: 0;
  padding: 9px 18px;
  background: var(--ls-yellow);
  color: var(--ls-navy-deep);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
  border-radius: 999px;
  border: 1px solid #E0AC1A;
  transition: transform 0.16s var(--ls-ease), box-shadow 0.16s var(--ls-ease);
}
.ls-cta-small:hover{
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(242,193,46,0.40);
}

/* ────────────────── Hero ────────────────── */

.ls-hero{
  position: relative;
  padding: 88px 28px 96px;
  overflow: hidden;
}
.ls-hero-bg{
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 480px at 78% 26%, rgba(242,193,46,0.16), transparent 62%),
    radial-gradient(720px 420px at 14% 72%, rgba(63,90,108,0.10), transparent 60%),
    radial-gradient(560px 360px at 88% 92%, rgba(242,193,46,0.06), transparent 60%),
    var(--ls-bg);
  z-index: 0;
}
.ls-hero-inner{
  position: relative;
  z-index: 1;
  max-width: var(--ls-w-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.ls-eyebrow{
  display: inline-block;
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ls-navy);
  background: var(--ls-yellow-soft);
  border: 1px solid rgba(242,193,46,0.32);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.ls-headline{
  font-size: var(--fs-display);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: -0.018em;
  color: var(--ls-ink);
  margin: 0 0 22px;
  text-wrap: balance;
}
.ls-headline em{
  font-style: italic;
  font-weight: 500;
  color: var(--ls-muted);
}
.ls-accent{
  color: var(--ls-navy-deep);
  background: linear-gradient(180deg, transparent 56%, var(--ls-yellow-strong) 56%);
  padding: 0 4px;
  border-radius: 2px;
}

/* Author block — academic convention, right under headline */
.ls-author{
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-style: normal;
  padding: 14px 18px;
  margin: 0 0 24px;
  border-left: 3px solid var(--ls-yellow);
  background: rgba(255,255,255,0.55);
  border-radius: 0 var(--ls-radius-sm) var(--ls-radius-sm) 0;
  max-width: 580px;
}
.ls-author-name{
  font-size: 16px;
  font-weight: 700;
  color: var(--ls-ink);
  letter-spacing: -0.005em;
}
.ls-author-meta{
  font-size: var(--fs-meta);
  color: var(--ls-muted);
  line-height: 1.55;
}

.ls-subhead{
  font-size: var(--fs-lede);
  line-height: 1.6;
  color: var(--ls-muted);
  max-width: var(--ls-w-text);
  margin: 0 0 32px;
  text-wrap: pretty;
}

.ls-hero-ctas{
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.ls-cta-primary{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  background: linear-gradient(180deg, #F4CA45, #E0AC1A);
  color: var(--ls-navy-deep);
  border-radius: 12px;
  border: 1px solid #D8A410;
  box-shadow: var(--ls-shadow-yellow-sm);
  transition: transform 0.18s var(--ls-ease), box-shadow 0.18s var(--ls-ease);
}
.ls-cta-primary::before{
  content: "";
  position: absolute;
  top: 0; left: -120%;
  width: 80%; height: 100%;
  background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,0.45) 50%, transparent 70%);
  transition: left 0.7s var(--ls-ease);
  pointer-events: none;
}
.ls-cta-primary:hover{
  transform: translateY(-2px);
  box-shadow: var(--ls-shadow-yellow-md);
}
.ls-cta-primary:hover::before{ left: 120%; }
.ls-cta-arrow{
  display: inline-block;
  transition: transform 0.18s var(--ls-ease);
}
.ls-cta-primary:hover .ls-cta-arrow{ transform: translateX(4px); }

.ls-cta-secondary{
  font-size: 15px;
  font-weight: 500;
  color: var(--ls-navy);
  border-bottom: 1px dashed rgba(63,90,108,0.35);
  padding-bottom: 2px;
  transition: color 0.16s var(--ls-ease), border-color 0.16s var(--ls-ease);
}
.ls-cta-secondary:hover{ border-bottom-style: solid; color: var(--ls-ink); }

.ls-hero-quickfacts{
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 0 48px;
  margin: 0;
}
.ls-hero-quickfacts > div{ display: flex; flex-direction: column; }
.ls-hero-quickfacts dt{
  font-size: var(--fs-quick);
  font-weight: 800;
  color: var(--ls-ink);
  letter-spacing: -0.02em;
  line-height: 1;
  margin: 0;
}
.ls-hero-quickfacts dd{
  font-size: var(--fs-meta);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ls-muted);
  margin: 6px 0 0;
  text-transform: uppercase;
}
.ls-hero-quickfacts dd code{ text-transform: none; padding: 0 4px; }

/* Hero pictogram — single bob animation; no per-floor pulse stacking */
.ls-hero-art{
  display: flex;
  justify-content: center;
  align-items: center;
}
.ls-pictogram{
  width: 100%;
  max-width: 420px;
  height: auto;
  filter: drop-shadow(0 14px 28px rgba(63,90,108,0.18));
  will-change: transform;
  animation: ls-bob 9s ease-in-out infinite;
}
@keyframes ls-bob{
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

.ls-hero-scrollcue{
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--ls-low);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.ls-scrollarrow{
  font-size: 18px;
  animation: ls-arrowdrop 1.8s ease-in-out infinite;
}
@keyframes ls-arrowdrop{
  0%, 100% { transform: translateY(0);  opacity: 0.6; }
  50%      { transform: translateY(6px); opacity: 1;  }
}

/* ────────────────── Built-with strip ────────────────── */

.ls-builtwith{
  background: var(--ls-surface);
  border-top: 1px solid var(--ls-line);
  border-bottom: 1px solid var(--ls-line);
  padding: 22px 28px;
}
.ls-builtwith-inner{
  max-width: var(--ls-w-content);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}
.ls-builtwith-label{
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ls-low);
  flex-shrink: 0;
}
.ls-builtwith-row{
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
}
.ls-builtwith-row li{
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ls-navy);
  position: relative;
}
.ls-builtwith-row li + li::before{
  content: "·";
  position: absolute;
  left: -16px;
  color: var(--ls-line);
}

/* ────────────────── Generic section ────────────────── */

.ls-section{
  padding: var(--ls-pad-section) 28px;
  position: relative;
}
.ls-section-tight{ padding: 56px 28px; }
.ls-section:nth-of-type(even){
  background: var(--ls-surface-2);
  border-top: 1px solid var(--ls-line-2);
  border-bottom: 1px solid var(--ls-line-2);
}
/* The flow diagram section sits inside ls-section but should match the
   previous section visually — handled by the .ls-figure-wrap rules below. */
.ls-figure-wrap{ background: var(--ls-bg); border: none; }

.ls-section-inner{ max-width: var(--ls-w-content); margin: 0 auto; }
.ls-section-head{ max-width: 820px; margin-bottom: 56px; }
.ls-section-head-tight{ margin-bottom: 28px; }
.ls-section-head h2{
  font-size: var(--fs-h2);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 18px;
  color: var(--ls-ink);
  text-wrap: balance;
}
.ls-section-lede{
  font-size: 18px;
  color: var(--ls-muted);
  margin: 0;
  max-width: var(--ls-w-text);
  text-wrap: pretty;
}

/* ────────────────── Problem ────────────────── */

.ls-problem-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.ls-problem-card{
  background: var(--ls-surface);
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-radius-lg);
  padding: 32px var(--ls-pad-card-md);
  box-shadow: var(--ls-shadow-sm);
  transition: transform 0.2s var(--ls-ease), box-shadow 0.2s var(--ls-ease);
}
.ls-problem-card:hover{
  transform: translateY(-3px);
  box-shadow: var(--ls-shadow-md);
}
.ls-problem-stat{
  font-size: var(--fs-stat);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ls-navy-deep);
  line-height: 1;
  margin-bottom: 16px;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px;
}
.ls-problem-stat .ls-stat-num{
  display: inline-block;
  font-feature-settings: "tnum" 1;
}
.ls-problem-stat span:not(.ls-stat-num){
  font-size: 0.46em;
  font-weight: 600;
  color: var(--ls-muted);
  letter-spacing: -0.01em;
}
.ls-problem-stat sup{
  font-size: 0.36em;
  vertical-align: super;
  color: var(--ls-muted);
  font-weight: 600;
  margin-left: 1px;
}
.ls-problem-card h3{
  font-size: 17px;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--ls-ink);
}
.ls-problem-card p{
  font-size: var(--fs-body-sm);
  line-height: 1.6;
  color: var(--ls-muted);
  margin: 0;
  text-wrap: pretty;
}
.ls-problem-claim{
  font-size: 18px;
  line-height: 1.55;
  color: var(--ls-ink);
  background: var(--ls-yellow-soft);
  border-left: 4px solid var(--ls-yellow);
  padding: 22px 28px;
  border-radius: var(--ls-radius-md);
  margin: 0;
  max-width: var(--ls-w-text);
  text-wrap: pretty;
}
.ls-problem-claim strong{ color: var(--ls-navy-deep); }

/* ────────────────── Figure / methodology diagram ────────────────── */

.ls-figure{ margin: 0; }
.ls-figcaption{
  font-size: var(--fs-body-sm);
  color: var(--ls-muted);
  line-height: 1.55;
  max-width: var(--ls-w-text);
  margin: 16px auto 0;
  text-align: center;
  text-wrap: pretty;
}
.ls-figcaption strong{ color: var(--ls-ink); font-weight: 700; margin-right: 4px; }

.ls-flowdiag{
  background: var(--ls-surface);
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-radius-lg);
  padding: 28px 32px;
  box-shadow: var(--ls-shadow-sm);
  overflow-x: auto;
}
.ls-flow-svg{
  width: 100%;
  min-width: 760px;
  height: auto;
  display: block;
}

/* Equation figure */
.ls-figure-eqn{
  background: var(--ls-surface);
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-radius-lg);
  padding: 28px 32px;
  margin: 0 0 56px;
  box-shadow: var(--ls-shadow-sm);
}
.ls-eqn{
  font-family: var(--ff-mono);
  font-size: clamp(13px, 1.6vw, 17px);
  line-height: 1.65;
  color: var(--ls-navy-deep);
  margin: 0;
  white-space: pre;
  text-align: left;
  display: block;
  overflow-x: auto;
  padding: 6px 0;
}
.ls-figure-eqn .ls-figcaption{ text-align: left; margin-top: 14px; }

/* Sensitivity grid figure */
.ls-figure-grid{ margin: 32px 0 40px; }
.ls-grid-wrap{
  background: var(--ls-surface);
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-radius-md);
  padding: 24px;
  box-shadow: var(--ls-shadow-sm);
  overflow-x: auto;
}
.ls-sensgrid{
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-body-sm);
  min-width: 460px;
}
.ls-sensgrid th, .ls-sensgrid td{
  padding: 12px 16px;
  border-bottom: 1px solid var(--ls-line);
  text-align: right;
}
.ls-sensgrid thead th{
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--ls-muted);
  background: var(--ls-surface-2);
  text-align: right;
}
.ls-sensgrid thead th:first-child,
.ls-sensgrid tbody th{ text-align: left; color: var(--ls-ink); font-weight: 700; }
.ls-sensgrid tbody td{
  font-family: var(--ff-mono);
  color: var(--ls-ink);
  font-weight: 500;
}
.ls-sensgrid .ls-grid-highlight{
  background: var(--ls-yellow-soft);
  color: var(--ls-navy-deep);
  font-weight: 700;
}
.ls-sensgrid tbody tr:last-child th,
.ls-sensgrid tbody tr:last-child td{ border-bottom: none; }

/* ────────────────── Three layers ────────────────── */

.ls-layers{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.ls-layer-card{
  background: var(--ls-surface);
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-radius-lg);
  padding: var(--ls-pad-card-lg) 32px;
  position: relative;
  box-shadow: var(--ls-shadow-sm);
  transition: transform 0.22s var(--ls-ease), box-shadow 0.22s var(--ls-ease);
  display: flex;
  flex-direction: column;
  gap: 0;
}
.ls-layer-card:hover{
  transform: translateY(-4px);
  box-shadow: var(--ls-shadow-lg);
}
.ls-layer-num{
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ls-yellow-text);
  margin-bottom: 6px;
}
.ls-layer-tag{
  display: inline-block;
  align-self: flex-start;
  padding: 3px 10px;
  font-size: var(--fs-tag);
  font-weight: 700;
  letter-spacing: 0.14em;
  border-radius: 4px;
  margin-bottom: 18px;
}
.ls-tag-solve{ background: rgba(63,90,108,0.10);  color: var(--ls-navy-deep); }
.ls-tag-score{ background: rgba(242,193,46,0.22); color: var(--ls-yellow-text); }
.ls-tag-cost { background: rgba(46,68,86,0.10);   color: var(--ls-navy-deep); }
.ls-layer-card h3{
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  color: var(--ls-ink);
  text-wrap: balance;
}
.ls-layer-tech{
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ls-navy);
  margin-bottom: 18px;
}
.ls-layer-card > p{
  font-size: var(--fs-body-sm);
  line-height: 1.65;
  color: var(--ls-muted);
  margin: 0 0 18px;
  text-wrap: pretty;
}
.ls-layer-bullets{
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}
.ls-layer-bullets li{
  position: relative;
  padding-left: 22px;
  font-size: var(--fs-body-xs);
  line-height: 1.55;
  color: var(--ls-ink);
  margin-bottom: 8px;
}
.ls-layer-bullets li::before{
  content: "→";
  position: absolute;
  left: 0;
  color: var(--ls-yellow-text);
  font-weight: 700;
}

/* Layer callouts — for audit-trail / determinism / benchmarks blocks */
.ls-callout{
  background: var(--ls-surface-2);
  border: 1px solid var(--ls-line);
  border-left: 3px solid var(--ls-navy);
  border-radius: var(--ls-radius-sm);
  padding: 14px 16px;
  margin-top: 14px;
}
.ls-callout-strong{
  border-left-color: var(--ls-yellow);
  background: var(--ls-yellow-soft);
}
.ls-callout-label{
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ls-yellow-text);
  margin-bottom: 8px;
}
.ls-callout p{
  font-size: 13px;
  line-height: 1.55;
  color: var(--ls-ink);
  margin: 0;
  text-wrap: pretty;
}
.ls-callout code{ font-size: 0.88em; }

/* Optimality badges row */
.ls-badge-row{
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.ls-badge{
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.10em;
  border-radius: 4px;
  font-family: var(--ff-mono);
}
.ls-badge-proven{ background: rgba(76,175,80,0.16);  color: #1F5C24; }
.ls-badge-near  { background: rgba(33,150,243,0.16); color: #0A4A8A; }
.ls-badge-time  { background: rgba(255,152,0,0.18);  color: #7A4500; }

/* ────────────────── Pull-quote divider ────────────────── */

.ls-pullquote{
  padding: 96px 28px;
  background: var(--ls-bg);
  border-top: 1px solid var(--ls-line-2);
  border-bottom: 1px solid var(--ls-line-2);
}
.ls-pullquote-inner{
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}
.ls-pullquote blockquote{
  font-family: var(--ff-serif);
  font-style: italic;
  font-size: var(--fs-pullq);
  font-weight: 400;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ls-ink);
  margin: 0 0 18px;
  text-wrap: balance;
  position: relative;
}
.ls-pullquote blockquote::before{
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background: var(--ls-yellow);
  margin: 0 auto 24px;
  border-radius: 2px;
}
.ls-pullquote blockquote em{ color: var(--ls-navy-deep); font-style: italic; font-weight: 500; }
.ls-pullquote cite{
  font-size: var(--fs-meta);
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--ls-muted);
  font-style: normal;
}

/* ────────────────── Results: KPI tiles + table ────────────────── */

.ls-kpi-row{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}
.ls-kpi-tile{
  background: var(--ls-surface);
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-radius-lg);
  padding: 26px 28px;
  box-shadow: var(--ls-shadow-sm);
  transition: transform 0.2s var(--ls-ease), box-shadow 0.2s var(--ls-ease);
}
.ls-kpi-tile:hover{
  transform: translateY(-3px);
  box-shadow: var(--ls-shadow-md);
}
.ls-kpi-label{
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ls-muted);
  margin-bottom: 10px;
}
.ls-kpi-num{
  font-size: var(--fs-kpi);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.02;
  color: var(--ls-navy-deep);
  margin-bottom: 10px;
  font-feature-settings: "tnum" 1;
}
.ls-kpi-num .ls-irr{ font-size: 0.48em; color: var(--ls-navy); white-space: nowrap; }
.ls-kpi-foot{
  font-size: 13px;
  color: var(--ls-muted);
  line-height: 1.5;
}

.ls-results-table{
  background: var(--ls-surface);
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-radius-lg);
  overflow: hidden;
  box-shadow: var(--ls-shadow-sm);
  margin: 0 0 32px;
}
.ls-rt-row{
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 16px;
  padding: 16px 28px;
  border-bottom: 1px solid var(--ls-line);
  align-items: center;
  transition: background 0.16s var(--ls-ease);
}
.ls-rt-row:last-child{ border-bottom: none; }
.ls-rt-row > div:first-child{
  font-weight: 600;
  color: var(--ls-ink);
  font-size: var(--fs-body-sm);
}
.ls-rt-row > div:not(:first-child){
  font-family: var(--ff-mono);
  font-size: 14px;
  color: var(--ls-ink);
  text-align: right;
  font-weight: 500;
}
.ls-rt-head{
  background: linear-gradient(180deg, var(--ls-surface-2), var(--ls-surface));
}
.ls-rt-head > div{
  font-family: var(--ff-sans) !important;
  font-size: 11px !important;
  color: var(--ls-muted) !important;
  font-weight: 700 !important;
  letter-spacing: 0.10em;
  text-transform: uppercase;
}
.ls-rt-cost{ color: var(--ls-navy-deep); }
.ls-rt-bal { color: var(--ls-ink);       }
.ls-rt-col { color: var(--ls-navy);      }
.ls-rt-row:not(.ls-rt-head):hover{ background: var(--ls-surface-2); }

.ls-results-claim{
  font-size: 17px;
  line-height: 1.55;
  color: var(--ls-muted);
  text-align: center;
  margin: 0 auto;
  max-width: var(--ls-w-text);
  text-wrap: pretty;
}
.ls-results-claim strong{ color: var(--ls-ink); font-weight: 700; }

/* ────────────────── Stack ────────────────── */

.ls-stack-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ls-stack-card{
  background: var(--ls-surface);
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-radius-md);
  padding: var(--ls-pad-card-md);
  box-shadow: var(--ls-shadow-sm);
  transition: transform 0.18s var(--ls-ease), box-shadow 0.18s var(--ls-ease);
}
.ls-stack-card:hover{
  transform: translateY(-2px);
  box-shadow: var(--ls-shadow-md);
}
.ls-stack-name{
  font-size: 17px;
  font-weight: 700;
  color: var(--ls-ink);
  margin-bottom: 2px;
}
.ls-stack-role{
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--ls-yellow-text);
  margin-bottom: 12px;
}
.ls-stack-card p{
  font-size: var(--fs-body-xs);
  line-height: 1.6;
  color: var(--ls-muted);
  margin: 0;
  text-wrap: pretty;
}

/* ────────────────── References ────────────────── */

.ls-references{ padding: 80px 28px; }
.ls-references-list{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 32px;
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: ref;
}
.ls-references-list li{
  position: relative;
  padding-left: 36px;
  font-size: var(--fs-body-sm);
  line-height: 1.55;
  color: var(--ls-ink);
}
.ls-references-list li em{ color: var(--ls-navy); font-style: italic; }
.ls-ref-num{
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--ff-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--ls-yellow-text);
}

/* ────────────────── Final CTA ────────────────── */

.ls-finalcta{
  background:
    radial-gradient(700px 400px at 80% 20%, rgba(242,193,46,0.16), transparent 60%),
    linear-gradient(135deg, var(--ls-navy-deep), var(--ls-navy));
  color: #FFFFFF;
  padding: 96px 28px;
  text-align: center;
}
.ls-finalcta-inner{
  max-width: 820px;
  margin: 0 auto;
}
.ls-finalcta h2{
  font-size: var(--fs-h2-cta);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  color: #FFFFFF;
  line-height: 1.18;
  text-wrap: balance;
}
.ls-finalcta p{
  font-size: 18px;
  color: rgba(255,255,255,0.80);
  margin: 0 0 36px;
  text-wrap: pretty;
}
.ls-finalcta em{ color: var(--ls-yellow); font-style: normal; font-weight: 600; }
.ls-cta-lg{
  font-size: 18px;
  padding: 18px 40px;
}

/* ────────────────── Colophon footer (3-col) ────────────────── */

.ls-footer{
  background: var(--ls-bg);
  border-top: 1px solid var(--ls-line);
  padding: 56px 28px 28px;
}
.ls-footer-inner{
  max-width: var(--ls-w-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.6fr;
  gap: 56px;
}
.ls-footer-col{ font-size: var(--fs-body-xs); color: var(--ls-muted); line-height: 1.55; }
.ls-footer-brandcol .ls-footer-brand{
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 12px;
}
.ls-footer-brand .ls-brand-wordmark{ font-size: 16px; }
.ls-footer-tag{
  font-size: var(--fs-body-xs);
  color: var(--ls-muted);
  margin: 0;
  max-width: 360px;
  text-wrap: pretty;
}
.ls-footer-h{
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ls-ink);
  margin-bottom: 16px;
}
.ls-footer-links{ list-style: none; padding: 0; margin: 0; }
.ls-footer-links li{ margin-bottom: 8px; }
.ls-footer-links a{
  color: var(--ls-muted);
  transition: color 0.16s var(--ls-ease);
}
.ls-footer-links a:hover{ color: var(--ls-ink); }
.ls-colophon{
  margin: 0;
  display: grid;
  grid-template-columns: minmax(110px, max-content) 1fr;
  gap: 6px 14px;
}
.ls-colophon dt{
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--ls-low);
}
.ls-colophon dd{
  margin: 0;
  font-size: 13px;
  color: var(--ls-ink);
  line-height: 1.5;
}
.ls-colophon dd code{ font-size: 0.88em; }
.ls-footer-base{
  border-top: 1px solid var(--ls-line);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
  font-size: 12px;
  color: var(--ls-low);
  letter-spacing: 0.04em;
}

/* ────────────────── Scroll-triggered fade-ups ────────────────── */

@supports (animation-timeline: view()){
  .ls-section > .ls-section-inner,
  .ls-figure-wrap > .ls-section-inner,
  .ls-pullquote-inner,
  .ls-finalcta-inner,
  .ls-builtwith-inner{
    animation: ls-fade-up linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 18%;
  }
  @keyframes ls-fade-up{
    from{ opacity: 0; transform: translateY(20px); }
    to  { opacity: 1; transform: translateY(0); }
  }
}

/* ────────────────── Responsive ────────────────── */

@media (max-width: 1100px){
  .ls-hero-inner{ gap: 40px; }
  .ls-pictogram{ max-width: 360px; }
  .ls-hero-quickfacts{ gap: 0 36px; }
}

@media (max-width: 960px){
  .ls-hero-inner{ grid-template-columns: 1fr; gap: 40px; }
  .ls-hero-art{ order: -1; max-width: 320px; margin: 0 auto; }
  .ls-pictogram{ max-width: 320px; }
  .ls-problem-grid, .ls-layers, .ls-stack-grid{ grid-template-columns: 1fr; }
  .ls-kpi-row{ grid-template-columns: 1fr; gap: 14px; }
  .ls-references-list{ grid-template-columns: 1fr; }
  .ls-footer-inner{ grid-template-columns: 1fr; gap: 36px; }
  .ls-section{ padding: 72px 22px; }
  .ls-hero{ padding: 56px 22px 80px; }
  .ls-references{ padding: 56px 22px; }
  .ls-pullquote{ padding: 72px 22px; }
  .ls-finalcta{ padding: 72px 22px; }
  .ls-figure-eqn{ padding: 22px; }

  /* Hero quickfacts wrap to 2x2 grid */
  .ls-hero-quickfacts{ grid-template-columns: repeat(2, 1fr); gap: 24px 36px; }

  /* Nav links become a horizontal scroll strip — don't display:none */
  .ls-nav-links{
    margin-right: 8px;
    padding-bottom: 2px;
    mask-image: linear-gradient(90deg, black 0, black calc(100% - 14px), transparent 100%);
    -webkit-mask-image: linear-gradient(90deg, black 0, black calc(100% - 14px), transparent 100%);
  }

  /* Results table: rebuild as one card per metric so values stay labelled */
  .ls-rt-row{
    grid-template-columns: 1fr 1fr;
    padding: 14px 18px;
  }
  .ls-rt-head{ display: none; }
  .ls-rt-row > div:first-child{
    grid-column: 1 / span 2;
    border-bottom: 1px dashed var(--ls-line);
    padding-bottom: 8px;
    margin-bottom: 4px;
  }
  .ls-rt-row > div:not(:first-child){
    text-align: left;
    font-size: 13px;
    display: flex;
    flex-direction: column;
  }
  .ls-rt-row > div:not(:first-child)::before{
    content: attr(data-label);
    font-family: var(--ff-sans);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.10em;
    text-transform: uppercase;
    color: var(--ls-muted);
    margin-bottom: 4px;
  }
}

@media (max-width: 540px){
  .ls-nav-inner{ padding: 12px 18px; gap: 14px; }
  .ls-cta-small{ padding: 7px 14px; font-size: 13px; }
  .ls-brand-wordmark{ font-size: 15px; letter-spacing: 0.08em; }
  .ls-hero-quickfacts dt{ font-size: 30px; }
  .ls-author{ padding: 12px 14px; }
  .ls-builtwith-row{ gap: 18px; }
  .ls-builtwith-row li + li::before{ left: -10px; }
}

/* ────────────────── Reduced motion ────────────────── */

@media (prefers-reduced-motion: reduce){
  .ls-pictogram, .ls-scrollarrow,
  .ls-cta-primary::before{ animation: none !important; }
  *, *::before, *::after{
    transition: none !important;
    scroll-behavior: auto !important;
  }
  @supports (animation-timeline: view()){
    .ls-section > .ls-section-inner,
    .ls-figure-wrap > .ls-section-inner,
    .ls-pullquote-inner,
    .ls-finalcta-inner,
    .ls-builtwith-inner{
      animation: none !important;
      opacity: 1 !important;
      transform: none !important;
    }
  }
}