:root {
  color-scheme: dark;
  --bg: #0b0e11;
  --panel: #141920;
  --panel-soft: #10151a;
  --text: #f3f5f7;
  --muted: #aeb7c4;
  --muted-strong: #c7ced7;
  --border: #29323b;
  --border-strong: #3b4a4b;
  --accent: #8fe3c2;
  --accent-strong: #b8f3dc;
  --accent-soft: rgba(143, 227, 194, .075);
  --max: 1160px;
  --radius: 20px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 6.5rem; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 70% 10%, rgba(143, 227, 194, .045), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: inherit; }

.review-notice {
  padding: .48rem 1.25rem;
  background: var(--accent);
  color: #07120e;
  text-align: center;
  font-size: .76rem;
  font-weight: 850;
  letter-spacing: .055em;
  text-transform: uppercase;
}

.review-notice span { padding: 0 .35rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  min-height: 68px;
  padding: .8rem max(1.25rem, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  background: rgba(11, 14, 17, .9);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
  text-decoration: none;
}

.brand span { font-weight: 780; letter-spacing: -.015em; }
.brand small { margin-top: .28rem; color: var(--accent); font-size: .67rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }

nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .35rem 1.1rem; }
nav a { color: var(--muted); text-decoration: none; font-size: .9rem; }
nav a:hover, nav a:focus-visible { color: var(--text); }

.section-shell {
  width: min(var(--max), calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 6rem 0;
}

.section-divider { border-top: 1px solid rgba(255, 255, 255, .08); }

.hero {
  padding-top: clamp(3.5rem, 7vw, 6.5rem);
  padding-bottom: clamp(4rem, 7vw, 6rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(270px, .75fr);
  align-items: end;
  gap: clamp(2rem, 6vw, 5rem);
}

.hero h1 {
  max-width: 850px;
  margin: .7rem 0 1.25rem;
  font-size: clamp(3rem, 6.2vw, 5.3rem);
  line-height: .98;
  letter-spacing: -.052em;
}

.hero-copy {
  max-width: 760px;
  margin: 0;
  color: var(--muted-strong);
  font-size: clamp(1.04rem, 1.8vw, 1.25rem);
  line-height: 1.65;
}

.eyebrow, .label {
  margin: 0;
  color: var(--accent);
  font-size: .74rem;
  font-weight: 850;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: .7rem 1.05rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  text-decoration: none;
  font-size: .93rem;
  font-weight: 750;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button.primary { background: var(--accent); color: #07120e; border-color: var(--accent); }
.button.secondary { background: rgba(255, 255, 255, .02); color: var(--text); }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button.secondary:hover, .button.secondary:focus-visible { border-color: var(--accent); }

.hero-context {
  padding: 1.35rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(145deg, var(--accent-soft), rgba(255, 255, 255, .015));
}

.hero-context-lead { margin: .65rem 0 1.2rem; color: var(--muted-strong); font-size: .96rem; }
.signal-list { display: grid; gap: .55rem; margin: 0; padding: 0; list-style: none; }
.signal-list li { display: flex; gap: .75rem; align-items: baseline; padding-top: .55rem; border-top: 1px solid rgba(255, 255, 255, .08); font-size: .9rem; font-weight: 680; }
.signal-list span { color: var(--accent); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .7rem; letter-spacing: .08em; }

.section-lead-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
  margin-bottom: 2rem;
}

.section-heading { max-width: 760px; }
.section-heading h2, .feature-copy h2, .closing-section h2 {
  margin: .38rem 0 .8rem;
  font-size: clamp(2.35rem, 5vw, 4.6rem);
  line-height: 1.01;
  letter-spacing: -.045em;
}

.section-heading > p:last-child, .feature-copy > p:not(.eyebrow), .section-summary, .closing-section > p:not(.eyebrow) {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.bridge-card {
  padding: 1.25rem 1.35rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
}

.bridge-card p:last-child { margin: .55rem 0 0; color: var(--muted-strong); }

.grid { display: grid; gap: 1rem; }
.two-column { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.three-column { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card {
  padding: 1.45rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, .026), rgba(255, 255, 255, .008));
}

.card h3 { margin: .38rem 0 .6rem; font-size: 1.3rem; line-height: 1.28; letter-spacing: -.015em; }
.card p:last-child { margin-bottom: 0; color: var(--muted); }

.visual-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--panel-soft);
  box-shadow: 0 26px 70px rgba(0, 0, 0, .24);
}

.visual-frame-wide { margin-top: 1.5rem; }
.visual-frame img { width: 100%; height: auto; }
.visual-frame figcaption { padding: .8rem 1rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .78rem; }

.subsection-heading { max-width: 760px; margin: 4.75rem 0 1.4rem; }
.subsection-heading h3 { margin: .4rem 0 0; font-size: clamp(1.85rem, 3.5vw, 2.8rem); line-height: 1.1; letter-spacing: -.035em; }

.study-grid { margin-top: 1rem; }
.results-panel {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .75rem;
  margin-top: 1rem;
}

.results-panel div {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel);
}

.results-panel strong { display: block; color: var(--accent-strong); font-size: 2.15rem; line-height: 1; }
.results-panel span { display: block; margin-top: .45rem; color: var(--muted); font-size: .86rem; }
.fine-print { margin: .55rem 0 0; color: var(--muted); font-size: .8rem; }

.lesson-card {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  margin-top: 2rem;
  padding: 1.6rem;
  border: 1px solid rgba(143, 227, 194, .32);
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
}

.lesson-card h3 { margin: .4rem 0 0; font-size: clamp(1.55rem, 3vw, 2.35rem); line-height: 1.12; letter-spacing: -.03em; }
.limitations { padding-left: 1.5rem; border-left: 1px solid rgba(143, 227, 194, .28); }
.limitations p:last-child { margin: .45rem 0 0; color: var(--muted); font-size: .92rem; }

.alt-section {
  border-top: 1px solid rgba(255, 255, 255, .07);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
  background: linear-gradient(100deg, rgba(143, 227, 194, .045), transparent 48%);
}

.feature-layout {
  display: grid;
  grid-template-columns: minmax(280px, .75fr) minmax(0, 1.25fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

.feature-copy > p { margin-top: 0; }
.check-list { display: grid; gap: .72rem; margin: 1.4rem 0 1.65rem; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 1.4rem; color: var(--muted-strong); }
.check-list li::before { position: absolute; left: 0; color: var(--accent); content: "↳"; }
.visual-frame-feature { align-self: center; }

.selected-work-lead { align-items: center; }
.section-summary { margin: 0; }
.work-grid { margin-top: 1.5rem; }
.work-grid .card { min-height: 100%; }

.closing-section { max-width: 900px; text-align: center; }
.closing-section > p { max-width: 760px; margin: 0 auto 1.6rem; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  width: min(var(--max), calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
  color: var(--muted);
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: .86rem;
}

@media (max-width: 900px) {
  html { scroll-padding-top: 1rem; }
  .site-header { position: static; align-items: flex-start; flex-direction: column; gap: .7rem; }
  nav { justify-content: flex-start; }
  .hero-grid, .section-lead-grid, .feature-layout, .lesson-card { grid-template-columns: 1fr; }
  .hero-context { max-width: 640px; }
  .limitations { padding: 1.25rem 0 0; border-top: 1px solid rgba(143, 227, 194, .28); border-left: 0; }
  .three-column { grid-template-columns: 1fr; }
  .work-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .work-grid .card:first-child { grid-column: 1 / -1; }
}

@media (max-width: 680px) {
  .review-notice { padding-inline: .8rem; font-size: .67rem; }
  .site-header { padding-inline: 1rem; }
  nav { display: grid; width: 100%; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .4rem; }
  nav a { padding: .45rem .2rem; border-top: 1px solid var(--border); font-size: .73rem; line-height: 1.25; }
  .section-shell { width: min(100% - 2rem, var(--max)); padding: 4.5rem 0; }
  .hero { padding-top: 3.75rem; padding-bottom: 4.25rem; }
  .hero h1 { font-size: clamp(2.55rem, 13vw, 3.7rem); overflow-wrap: normal; }
  .hero-copy { font-size: 1rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .button { width: 100%; }
  .two-column, .results-panel, .work-grid { grid-template-columns: 1fr; }
  .work-grid .card:first-child { grid-column: auto; }
  .subsection-heading { margin-top: 3.75rem; }
  .visual-frame-wide { margin-inline: -.35rem; border-radius: 14px; }
  .visual-frame figcaption { font-size: .72rem; }
  .site-footer { flex-direction: column; width: calc(100% - 2rem); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}