:root {
  /* Typography */
  --font-ui: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --text-h1-size: clamp(2.7rem, 4.8vw, 4.5rem);
  --text-h1-line: 1.02;
  --text-h1-track: -0.045em;

  --text-h2-size: clamp(1.9rem, 3vw, 2.9rem);
  --text-h2-line: 1.08;
  --text-h2-track: -0.03em;

  --text-h3-size: 1.08rem;
  --text-body-size: 1rem;
  --text-body-line: 1.75;
  --text-small-size: 0.94rem;
  --text-kicker-size: 0.82rem;
  --text-kicker-track: 0.08em;

  /* Layout */
  --container-max: 1260px;
  --space-hero-y: 78px;
  --space-section-y: 42px;
  --space-card: 24px;
  --space-card-gap: 22px;
  --space-grid-gap: 34px;

  /* Radius */
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-pill: 999px;

  /* Motion */
  --motion-fast: 0.2s ease;
  --hover-lift: translateY(-1px);

  /* Shared component sizing */
  --nav-padding-y: 16px;
  --hero-panel-padding: 40px;
  --section-card-padding: 40px;
  --button-padding-y: 14px;
  --button-padding-x: 20px;
  --chip-padding-y: 8px;
  --chip-padding-x: 14px;

  /* Semantic defaults */
  --color-bg: #ffffff;
  --color-bg-alt: #f7f7f7;
  --color-surface: #ffffff;
  --color-surface-2: #f7f7f7;
  --color-surface-soft: #f3f3f3;
  --color-surface-dark: #173634;
  --color-surface-dark-2: #112B2A;

  --color-text: #173634;
  --color-text-soft: #35514E;
  --color-text-muted: #6D6A63;
  --color-text-on-dark: #F4FBF9;
  --color-text-on-dark-soft: rgba(234, 244, 241, 0.82);
  --color-text-on-dark-muted: rgba(221, 244, 239, 0.76);

  /* Muted contrast surfaces used for mixed-light blocks on dark themes */
  --color-contrast-surface: #EEF0EC;
  --color-contrast-surface-2: #F7F7F4;
  --color-contrast-soft: #E6E7E1;
  --color-text-on-contrast: #1B2624;
  --color-text-on-contrast-soft: #4B5D59;
  --color-text-on-contrast-muted: #7A817C;

  --color-accent: #79B7AE;
  --color-accent-2: #2FC4CC;
  --color-accent-3: #A8D8D0;
  --color-accent-strong: #D4AF37;

  --color-border: rgba(23, 54, 52, 0.12);
  --color-border-soft: rgba(23, 54, 52, 0.08);
  --color-border-on-dark: rgba(221, 244, 239, 0.14);
  --color-border-on-contrast: rgba(27, 38, 36, 0.10);

  --shadow-soft: 0 14px 34px rgba(22, 48, 46, 0.05);
  --shadow-medium: 0 18px 40px rgba(22, 48, 46, 0.08);
  --shadow-dark: 0 18px 50px rgba(2, 10, 10, 0.28);

  --gradient-page: linear-gradient(180deg, #ffffff 0%, #f7f7f7 100%);
  --gradient-surface: linear-gradient(180deg, #ffffff 0%, #f7f7f7 100%);
  --gradient-surface-soft: linear-gradient(180deg, #f7f7f7 0%, #f1f1f1 100%);
  --gradient-hero: linear-gradient(180deg, #173634 0%, #112B2A 100%);
  --gradient-cta: linear-gradient(135deg, #2FC4CC, #79B7AE);
  --gradient-quote: linear-gradient(180deg, rgba(47, 196, 204, 0.08), rgba(121, 183, 174, 0.08));
  --gradient-contrast-surface: linear-gradient(180deg, var(--color-contrast-surface-2) 0%, var(--color-contrast-surface) 100%);
  --gradient-contrast-soft: linear-gradient(180deg, var(--color-contrast-surface) 0%, var(--color-contrast-soft) 100%);

  --glow-hero: radial-gradient(circle, rgba(47, 196, 204, 0.16), transparent 70%);
  --glow-logo: radial-gradient(circle, rgba(47, 196, 204, 0.10), transparent 66%);
}

/* Reset / base */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-ui);
  background: var(--gradient-page);
  color: var(--color-text);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  width: min(var(--container-max), calc(100% - 40px));
  margin: 0 auto;
}

/* Utility */
.is-on-dark { color: var(--color-text-on-dark); }
.is-on-dark-soft { color: var(--color-text-on-dark-soft); }
.is-on-dark-muted { color: var(--color-text-on-dark-muted); }
.is-on-contrast { color: var(--color-text-on-contrast); }
.is-on-contrast-soft { color: var(--color-text-on-contrast-soft); }
.is-on-contrast-muted { color: var(--color-text-on-contrast-muted); }

/* Toolbar */
.toolbar {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 60;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tool-btn {
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  border: 1px solid var(--color-border);
  color: var(--color-text-soft);
  font-size: 0.82rem;
  font-weight: 700;
  backdrop-filter: blur(10px);
  transition: transform var(--motion-fast), color var(--motion-fast), box-shadow var(--motion-fast);
}
.tool-btn:hover { color: var(--color-text); transform: var(--hover-lift); }

/* Nav */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: color-mix(in srgb, var(--color-bg-alt) 88%, transparent);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: var(--nav-padding-y) 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  object-fit: cover;
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--color-accent) 18%, transparent),
    color-mix(in srgb, var(--color-accent-2) 12%, transparent)
  );
  border: 1px solid var(--color-border);
  padding: 4px;
  flex: 0 0 auto;
}
.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.brand-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.brand-sub {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.nav-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  color: var(--color-text-soft);
  font-size: 0.95rem;
}
.nav-links a:hover { color: var(--color-text); }

/* Buttons */
.cta-inline,
.btn-primary,
.btn-secondary,
.btn-contrast {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  transition: transform var(--motion-fast), box-shadow var(--motion-fast), color var(--motion-fast), background var(--motion-fast);
}
.cta-inline {
  padding: 12px 18px;
  border: 1px solid var(--color-border);
  background: var(--gradient-surface);
  box-shadow: var(--shadow-medium);
  color: var(--color-text);
}
.btn-primary {
  padding: var(--button-padding-y) var(--button-padding-x);
  background: var(--gradient-cta);
  color: var(--color-surface-dark);
  font-size: 0.96rem;
  box-shadow: var(--shadow-soft);
}
.btn-secondary {
  padding: var(--button-padding-y) var(--button-padding-x);
  border: 1px solid var(--color-border-on-dark, var(--color-border));
  background: color-mix(in srgb, var(--color-surface) 12%, transparent);
  color: currentColor;
  font-size: 0.96rem;
}
.btn-contrast {
  padding: var(--button-padding-y) var(--button-padding-x);
  border: 1px solid var(--color-border-on-contrast);
  background: var(--gradient-contrast-surface);
  color: var(--color-text-on-contrast);
  font-size: 0.96rem;
}
.cta-inline:hover,
.btn-primary:hover,
.btn-secondary:hover,
.btn-contrast:hover { transform: var(--hover-lift); }

/* Hero */
.hero { padding: var(--space-hero-y) 0 calc(var(--space-section-y) - 8px); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-grid-gap);
  align-items: start;
}
.hero-panel,
.logo-panel,
.info-panel,
.section-card,
.card,
.footer-card,
.pill-card,
.stat-card,
.principle-card,
.stack-block,
.stack-card {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-medium);
}
.hero-panel {
  padding: var(--hero-panel-padding);
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
  border: 1px solid var(--color-border);
  color: var(--color-text-on-dark);
}
.hero-panel::before {
  content: "";
  position: absolute;
  inset: auto -90px -90px auto;
  width: 240px;
  height: 240px;
  background: var(--glow-hero);
  filter: blur(12px);
  opacity: 0.72;
  pointer-events: none;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: var(--chip-padding-y) var(--chip-padding-x);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-accent-2) 10%, transparent);
  border: 1px solid var(--color-border-on-dark);
  color: var(--color-text-on-dark);
  font-size: var(--text-kicker-size);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 {
  font-size: var(--text-h1-size);
  line-height: var(--text-h1-line);
  letter-spacing: var(--text-h1-track);
  margin: 18px 0 16px;
  max-width: 11ch;
}
.hero-lead {
  font-size: 1.12rem;
  line-height: var(--text-body-line);
  color: var(--color-text-on-dark-soft);
  max-width: 58ch;
  margin-bottom: 14px;
}
.hero-sublead {
  font-size: var(--text-body-size);
  line-height: var(--text-body-line);
  color: var(--color-text-on-dark-muted);
  max-width: 62ch;
  margin-bottom: 28px;
}
.button-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 30px;
}
.hero-side-grid {
  display: grid;
  gap: 22px;
  align-content: start;
}
.logo-panel,
.info-panel {
  background: var(--gradient-surface);
  border: 1px solid var(--color-border);
}
.logo-panel {
  padding: 24px;
  display: grid;
  place-items: center;
  min-height: 220px;
  position: relative;
  overflow: hidden;
}
.logo-panel::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: var(--glow-logo);
  filter: blur(10px);
}
.hero-logo {
  position: relative;
  max-width: 240px;
  width: 68%;
  height: auto;
}
.info-panel {
  padding: 26px;
  display: grid;
  gap: 18px;
}
.panel-title {
  font-size: 1.02rem;
  font-weight: 700;
}
.muted {
  color: var(--color-text-soft);
  font-size: var(--text-small-size);
  line-height: var(--text-body-line);
}
.stack-block,
.stack-card {
  padding: 18px;
  border-radius: var(--radius-lg);
  background: var(--gradient-surface-soft);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}
.stack-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border-soft);
}
.stack-item:last-child { border-bottom: 0; }
.stack-label {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: var(--text-kicker-track);
  color: var(--color-text-muted);
  font-weight: 700;
}
.hero-outcomes {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-card-gap);
}

/* Sections / cards */
.section { padding: var(--space-section-y) 0; }
.section-card {
  padding: var(--section-card-padding);
  background: var(--gradient-surface);
  border: 1px solid var(--color-border);
}
.section-card--soft { background: var(--gradient-surface-soft); }
.section-card--contrast {
  background: var(--gradient-contrast-surface);
  border: 1px solid var(--color-border-on-contrast);
  color: var(--color-text-on-contrast);
}
.section-card--contrast .section-kicker { color: var(--color-text-on-contrast-muted); }
.section-card--contrast .section-header p { color: var(--color-text-on-contrast-soft); }

.section-header {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 26px;
  align-items: start;
  margin-bottom: 28px;
}
.section-kicker {
  font-size: var(--text-kicker-size);
  letter-spacing: var(--text-kicker-track);
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 700;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: var(--text-h2-size);
  line-height: var(--text-h2-line);
  letter-spacing: var(--text-h2-track);
  margin-bottom: 0;
}
.section-header p {
  color: var(--color-text-soft);
  font-size: var(--text-body-size);
  line-height: var(--text-body-line);
  margin-bottom: 0;
}
.grid-3,
.grid-2,
.principle-grid,
.stat-grid,
.trait-grid {
  display: grid;
  gap: var(--space-card-gap);
}
.grid-3,
.principle-grid,
.trait-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.stat-grid { grid-template-columns: 1fr; }

.card,
.pill-card,
.stat-card,
.principle-card {
  padding: var(--space-card);
  border-radius: var(--radius-lg);
  min-height: 100%;
  background: var(--gradient-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}
.card h3,
.pill-card h3,
.stat-card h3,
.principle-card h3 {
  font-size: var(--text-h3-size);
  margin-bottom: 10px;
}
.card p,
.card li,
.pill-card p,
.stat-card p,
.principle-card p {
  color: var(--color-text-soft);
  font-size: 0.95rem;
  line-height: var(--text-body-line);
  margin-bottom: 0;
}
.card ul { margin: 12px 0 0; padding-left: 18px; }

.card--contrast,
.pill-card--contrast,
.stat-card--contrast,
.principle-card--contrast {
  background: var(--gradient-contrast-surface);
  border: 1px solid var(--color-border-on-contrast);
  box-shadow: none;
}
.card--contrast h3,
.card--contrast p,
.card--contrast li,
.pill-card--contrast h3,
.pill-card--contrast p,
.stat-card--contrast h3,
.stat-card--contrast p,
.principle-card--contrast h3,
.principle-card--contrast p {
  color: var(--color-text-on-contrast);
}
.card--contrast p,
.card--contrast li,
.pill-card--contrast p,
.stat-card--contrast p,
.principle-card--contrast p {
  color: var(--color-text-on-contrast-soft);
}

.pill-kicker,
.stat-kicker {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: var(--text-kicker-track);
  color: var(--color-text-muted);
  font-weight: 700;
  margin-bottom: 8px;
}

/* Dark section helper */
.section--dark .section-card {
  background: var(--gradient-hero);
  color: var(--color-text-on-dark);
  border: 1px solid var(--color-border);
}
.section--dark .section-kicker { color: var(--color-text-on-dark-muted); }
.section--dark .section-header p { color: var(--color-text-on-dark-soft); }

/* Muted section helper for mixed-light blocks on dark pages */
.section--muted .section-card {
  background: var(--gradient-contrast-surface);
  color: var(--color-text-on-contrast);
  border: 1px solid var(--color-border-on-contrast);
}
.section--muted .section-kicker { color: var(--color-text-on-contrast-muted); }
.section--muted .section-header p { color: var(--color-text-on-contrast-soft); }
.section--muted .card,
.section--muted .pill-card,
.section--muted .stat-card,
.section--muted .principle-card {
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--color-border-on-contrast) 80%, transparent);
  box-shadow: none;
}
.section--muted .card h3,
.section--muted .pill-card h3,
.section--muted .stat-card h3,
.section--muted .principle-card h3,
.section--muted .card p,
.section--muted .pill-card p,
.section--muted .stat-card p,
.section--muted .principle-card p,
.section--muted .card li {
  color: var(--color-text-on-contrast);
}
.section--muted .card p,
.section--muted .pill-card p,
.section--muted .stat-card p,
.section--muted .principle-card p,
.section--muted .card li {
  color: var(--color-text-on-contrast-soft);
}

/* Quotes / footer */
.quote-block {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--gradient-quote);
  border: 1px solid var(--color-border-on-dark, var(--color-border));
  margin-top: 22px;
}
.quote-block p {
  margin: 0;
  font-size: 1.04rem;
  color: inherit;
  line-height: 1.7;
}
.quote-block--contrast {
  background: var(--gradient-contrast-soft);
  border: 1px solid var(--color-border-on-contrast);
  color: var(--color-text-on-contrast);
}

.footer-cta { padding: 40px 0 86px; }
.footer-card {
  padding: 36px;
  display: grid;
  grid-template-columns: 1.1fr auto;
  gap: 22px;
  align-items: center;
  background: var(--gradient-hero);
  border: 1px solid var(--color-border);
  color: var(--color-text-on-dark);
}
.footer-card h2 {
  font-size: clamp(1.9rem, 3vw, 2.8rem);
  line-height: 1.06;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
}
.footer-card p {
  margin-bottom: 0;
  color: var(--color-text-on-dark-soft);
  max-width: 62ch;
  line-height: var(--text-body-line);
}

/* Responsive */
@media (max-width: 1100px) {
  .hero-grid,
  .hero-outcomes,
  .section-header,
  .grid-3,
  .grid-2,
  .principle-grid,
  .trait-grid,
  .footer-card {
    grid-template-columns: 1fr;
  }

  .toolbar {
    position: static;
    padding: 14px 20px 0;
    justify-content: flex-end;
  }
}
@media (max-width: 720px) {
  .container { width: min(var(--container-max), calc(100% - 24px)); }
  .nav { flex-direction: column; align-items: flex-start; }
  .hero-panel,
  .info-panel,
  .section-card,
  .footer-card,
  .logo-panel { padding: 24px; }
  .brand { align-items: flex-start; }
  .stack-item { grid-template-columns: 1fr; }
  .grid-3,
  .grid-2,
  .principle-grid,
  .trait-grid { grid-template-columns: 1fr; }
}