/* ========================================
   HAND Protocol Foundation
   Modern & Clean Design System
   ======================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* --- Custom Properties --- */
:root {
  /* Colors */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8F7F4;
  --color-bg-warm: #FBF8F1;
  --color-bg-warm-tint: #FEF7E6;
  --color-bg-dark: #0C1220;
  --color-bg-dark-alt: #111827;
  --color-bg-cta: #0F172A;

  --color-text: #111827;
  --color-text-secondary: #4B5563;
  --color-text-muted: #6B7280;
  --color-text-on-dark: #F9FAFB;
  --color-text-on-dark-secondary: #CBD5E1;

  --color-accent: #D97706;
  --color-accent-hover: #B45309;
  --color-accent-warm: #F59E0B;
  --color-accent-light: #FEF3C7;
  --color-accent-glow: rgba(217, 119, 6, 0.15);

  --color-teal: #0D9488;
  --color-teal-light: #CCFBF1;

  --color-bg-dark-step-1: #1a1f3a;
  --color-bg-dark-step-2: #14233d;
  --color-bg-cta-step-2: #1E293B;

  --color-border: #E5E7EB;
  --color-border-light: #F3F4F6;
  --color-card-shadow: rgba(0, 0, 0, 0.04);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
}

/* --- Base Styles --- */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-2xl);
  }
}

/* --- Typography --- */
h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); }

p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.text--lg {
  font-size: 1.125rem;
  line-height: 1.75;
}

strong {
  color: var(--color-text);
  font-weight: 600;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: 44px;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--color-accent-glow);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-on-dark);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
}

.btn--ghost:hover {
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.05);
}

.btn--sm {
  min-height: 40px;
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

.btn--lg {
  padding: 0.875rem 2rem;
  font-size: 1rem;
}

/* ========================================
   Navigation — floating liquid-glass pills over transparent bar
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-md) 0;
  background: transparent;
  transition: padding var(--transition-base);
}

.nav--scrolled {
  padding: var(--space-sm) 0;
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Shared liquid-glass material */
.nav__left,
.nav__toggle,
.nav__links.active {
  --pill-bg: rgba(255, 255, 255, 0.62);
  --pill-border: rgba(13, 148, 136, 0.30);
  --pill-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.6),
    0 8px 32px rgba(13, 148, 136, 0.10),
    0 2px 8px rgba(15, 23, 42, 0.08);
}

/* Left pill: logo + links. Transparent over hero, frosted glass on scroll. */
.nav__left {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  border-radius: var(--radius-full);
  padding: 6px var(--space-md) 6px 6px;
  border: 1px solid transparent;
  background: transparent;
  transition:
    background-color var(--transition-base),
    backdrop-filter var(--transition-base),
    -webkit-backdrop-filter var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.nav--scrolled .nav__left {
  background: var(--pill-bg);
  backdrop-filter: blur(28px) saturate(1.8);
  -webkit-backdrop-filter: blur(28px) saturate(1.8);
  border-color: var(--pill-border);
  box-shadow: var(--pill-shadow);
}

.nav--scrolled .nav__logo,
.nav--scrolled .nav__link {
  color: var(--color-text);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 4px var(--space-md) 4px 4px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  background: transparent;
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--color-text-on-dark);
  letter-spacing: -0.01em;
  transition:
    color var(--transition-base),
    background-color var(--transition-base),
    backdrop-filter var(--transition-base),
    -webkit-backdrop-filter var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.nav__logo-img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: block;
  flex-shrink: 0;
}

.nav__logo-text {
  font-weight: 700;
  letter-spacing: -0.015em;
}

.nav__logo-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-teal);
  margin-left: 5px;
  vertical-align: 0.14em;
  box-shadow:
    0 0 0 1px rgba(13, 148, 136, 0.20),
    0 0 12px rgba(13, 148, 136, 0.55);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}

.nav--scrolled .nav__logo-dot {
  box-shadow:
    0 0 0 1px rgba(13, 148, 136, 0.30),
    0 0 8px rgba(13, 148, 136, 0.40);
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-xl);
}

.nav__link {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-on-dark-secondary);
  transition: color var(--transition-fast);
  padding: 4px 0;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--color-teal);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  opacity: 0;
  transition:
    transform 280ms cubic-bezier(0.22, 1, 0.36, 1),
    opacity 200ms ease-out;
}

.nav__link:hover {
  color: var(--color-text-on-dark);
}

.nav__link:hover::after {
  transform: scaleX(0.5);
  opacity: 0.6;
}

.nav__link--active {
  color: var(--color-text-on-dark);
}

.nav__link--active::after {
  transform: scaleX(1);
  opacity: 1;
}

.nav--scrolled .nav__link:hover {
  color: var(--color-text);
}

.nav--scrolled .nav__link--active {
  color: var(--color-text);
}

/* Right pill: Support CTA, paired visually with the left glass pill */
.nav__cta {
  display: inline-flex;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-on-dark);
  border: 1px solid rgba(255, 255, 255, 0.18);
  margin-left: auto;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-base);
}

.nav--scrolled .nav__cta {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.30),
    0 6px 20px rgba(217, 119, 6, 0.32),
    0 2px 6px rgba(180, 83, 9, 0.18);
}

.nav__cta:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  transform: translateY(-1px);
}

.nav--scrolled .nav__cta:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.35),
    0 8px 28px rgba(217, 119, 6, 0.40),
    0 2px 6px rgba(180, 83, 9, 0.22);
}

/* Mobile-only hamburger pill: matches .nav__left chrome on scroll */
.nav__toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  width: 44px;
  height: 44px;
  padding: 11px;
  transition:
    background-color var(--transition-base),
    backdrop-filter var(--transition-base),
    -webkit-backdrop-filter var(--transition-base),
    border-color var(--transition-base);
}

.nav--scrolled .nav__toggle {
  background: var(--pill-bg);
  backdrop-filter: blur(28px) saturate(1.8);
  -webkit-backdrop-filter: blur(28px) saturate(1.8);
  border-color: var(--pill-border);
  box-shadow: var(--pill-shadow);
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text-on-dark);
  border-radius: 2px;
  transform-origin: center;
  transition:
    transform var(--transition-fast),
    opacity var(--transition-fast),
    background var(--transition-fast);
}

.nav--scrolled .nav__toggle span {
  background: var(--color-text);
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

@media (min-width: 900px) {
  .nav__links {
    display: flex;
  }
  .nav__toggle {
    display: none;
  }
  /* On desktop the .nav__left wrapper is the pill, so the logo
     inside doesn't need its own padding ring. */
  .nav__logo {
    padding: 0;
  }
}

@media (max-width: 899px) {
  /* Below desktop: no pill chrome on .nav__left wrapper.
     A backdrop-filter on the wrapper would create a containing block
     and trap the dropdown panel inside its tiny width. The .nav__logo
     gets its own pill instead (sibling of .nav__links, so dropdown
     positioning stays anchored to the full nav). */
  .nav__left,
  .nav--scrolled .nav__left {
    gap: 0;
    padding: 0;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-color: transparent;
    box-shadow: none;
  }

  .nav--scrolled .nav__logo {
    background: var(--pill-bg);
    backdrop-filter: blur(28px) saturate(1.8);
    -webkit-backdrop-filter: blur(28px) saturate(1.8);
    border-color: var(--pill-border);
    box-shadow: var(--pill-shadow);
  }
}

@media (max-width: 480px) {
  .nav__logo-text {
    display: none;
  }
  /* No wordmark to protect, and the logo image is its own opaque graphic.
     Drop the pill chrome so the logo doesn't read as a floating ring. */
  .nav__logo,
  .nav--scrolled .nav__logo {
    padding: 0;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-color: transparent;
    box-shadow: none;
  }
}

/* Mobile dropdown panel — falls below the floating pills */
.nav__links.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: calc(100% + var(--space-sm));
  left: var(--space-md);
  right: var(--space-md);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(28px) saturate(1.8);
  -webkit-backdrop-filter: blur(28px) saturate(1.8);
  border: 1px solid var(--pill-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    0 16px 48px rgba(13, 148, 136, 0.12),
    0 4px 12px rgba(15, 23, 42, 0.10);
  gap: 0;
}

.nav__links.active .nav__link {
  color: var(--color-text);
  padding: var(--space-md) var(--space-lg);
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

/* Override the desktop underline pseudo on mobile dropdown */
.nav__links.active .nav__link::after {
  display: none;
}

.nav__links.active .nav__link:hover {
  background: rgba(13, 148, 136, 0.08);
  color: var(--color-accent);
}

.nav__links.active .nav__link--active {
  background: rgba(13, 148, 136, 0.10);
  color: var(--color-text);
}

@media (prefers-reduced-motion: reduce) {
  .nav,
  .nav__left,
  .nav__cta,
  .nav__logo,
  .nav__logo-dot,
  .nav__toggle,
  .nav__toggle span {
    transition: none;
  }
}

/* ========================================
   Hero
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--space-5xl) 0 var(--space-4xl);
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-dark-step-1) 40%, var(--color-bg-dark-step-2) 70%, var(--color-bg-dark) 100%);
}

.hero__grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.375rem 1rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-on-dark-secondary);
  margin-bottom: var(--space-xl);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-teal);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  color: var(--color-text-on-dark);
  margin-bottom: var(--space-xl);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.hero__title-accent {
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: clamp(1rem, 1.5vw, 1.1875rem);
  color: var(--color-text-on-dark-secondary);
  max-width: 680px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.75;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-4xl);
  flex-wrap: wrap;
}

.hero__provenance {
  max-width: 760px;
  margin: 0 auto;
  padding-top: var(--space-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-on-dark-secondary);
  line-height: 1.9;
}

.hero__provenance-sep {
  display: inline-block;
  margin: 0 0.55em;
  color: var(--color-accent);
  opacity: 0.6;
}

.hero__provenance .qf-link {
  color: inherit;
  border-bottom-color: rgba(255, 255, 255, 0.35);
  font-size: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  font-weight: inherit;
}

.hero__provenance .qf-link:hover,
.hero__provenance .qf-link:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.hero__provenance .qf-link__tip {
  text-transform: none;
  letter-spacing: 0;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-text-on-dark-secondary);
  animation: float 3s ease-in-out infinite;
  z-index: 1;
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ========================================
   Sections (General)
   ======================================== */
.section {
  padding: var(--space-4xl) 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--dark {
  background: var(--color-bg-dark);
}

.section--cta {
  background: linear-gradient(135deg, var(--color-bg-cta) 0%, var(--color-bg-cta-step-2) 100%);
  padding: var(--space-5xl) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-5xl) 0;
  }
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .section__header {
    margin-bottom: var(--space-4xl);
  }
}

.section__label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.section__label--light {
  color: var(--color-accent);
}

.section__title {
  margin-bottom: var(--space-lg);
}

.section__title--light {
  color: var(--color-text-on-dark);
}

.section__subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.section__subtitle--light {
  color: var(--color-text-on-dark-secondary);
}

/* ========================================
   About
   ======================================== */
.about__grid {
  display: grid;
  gap: var(--space-3xl);
}

@media (min-width: 768px) {
  .about__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
  }
}

.about__text p {
  margin-bottom: var(--space-lg);
}

.about__text p:last-child {
  margin-bottom: 0;
}

.about__values {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.value-card {
  padding: var(--space-xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.value-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px var(--color-accent-glow);
}

.value-card__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.value-card h3 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.value-card p {
  font-size: 0.9375rem;
}

/* ========================================
   Problem — vertical numbered narrative
   (breaks the card-grid monoculture; the asymmetry vs. the
   surrounding sections is intentional)
   ======================================== */
.problem__list {
  list-style: none;
  padding: 0;
  margin: 0 auto var(--space-3xl);
  max-width: 760px;
}

.problem__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-lg);
  align-items: start;
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .problem__item {
    grid-template-columns: 4rem 1fr;
    gap: var(--space-2xl);
    padding: var(--space-2xl) 0;
  }
}

.problem__item:first-child { padding-top: 0; }
.problem__item:last-child { border-bottom: none; padding-bottom: 0; }

.problem__num {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  padding-top: 0.35em;
}

.problem__name {
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 var(--space-sm);
  color: var(--color-text);
}

.problem__body p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.7;
}

.problem__barriers {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.problem__barriers-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.barriers-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
}

.barrier {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.5rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.barrier svg {
  color: var(--color-accent);
  flex-shrink: 0;
}

/* ========================================
   Solution
   ======================================== */
.solution__grid {
  display: grid;
  gap: var(--space-3xl);
}

@media (min-width: 768px) {
  .solution__grid {
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
  }
}

.solution__main {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.solution-item {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.solution-item__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-accent);
  flex-shrink: 0;
}

.solution-item h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.solution-item p {
  font-size: 0.9375rem;
}

.solution__aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.callout-card {
  padding: var(--space-2xl);
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-dark-alt) 100%);
  border-radius: var(--radius-lg);
  color: var(--color-text-on-dark);
}

.callout-card__title {
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
  color: var(--color-text-on-dark);
}

.callout-card p {
  color: var(--color-text-on-dark-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}

.callout-card p:last-child {
  margin-bottom: 0;
}

.callout-card strong {
  color: var(--color-text-on-dark);
  font-weight: 600;
}

.callout-card em {
  color: var(--color-text-on-dark);
  font-style: italic;
}

.callout-card--outline {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.callout-card--outline .callout-card__title {
  color: var(--color-text);
}

.callout-card--outline strong,
.callout-card--outline em {
  color: var(--color-text);
}

.callout-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.callout-list li {
  position: relative;
  padding-left: var(--space-lg);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.callout-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ========================================
   Who We Serve (Tabs)
   ======================================== */
.serve__tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.serve__tab {
  min-height: 44px;
  padding: 0.625rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--color-text-secondary);
}

.serve__tab:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.serve__tab.active {
  background: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
}

.serve__panel {
  display: none;
}

.serve__panel.active {
  display: block;
}

.serve__panel-inner {
  max-width: var(--container-narrow);
  margin: 0 auto;
  text-align: center;
}

.serve__panel-text {
  margin-bottom: var(--space-xl);
}

.serve__panel-text h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
}

.serve__panel-text p {
  font-size: 1.0625rem;
}

.serve__panel-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
}

.tag {
  display: inline-block;
  padding: 0.4375rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-light);
}

/* ========================================
   Track Record
   ======================================== */
.track__grid {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .track__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .track__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.track-card {
  padding: var(--space-2xl);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.track-card:hover {
  border-color: var(--color-accent);
  background: var(--color-bg);
  box-shadow: 0 4px 16px var(--color-accent-glow);
}

.track-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.track-card h3 {
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.track-card p {
  font-size: 0.9375rem;
}

/* ========================================
   Funding Goals
   ======================================== */
.funding__columns {
  display: grid;
  gap: var(--space-3xl);
  max-width: 1120px;
  margin: 0 auto;
}

@media (min-width: 1024px) {
  .funding__columns {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: start;
  }
}

.funding__column {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.funding__column-head {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.funding__column-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.funding__column-thread {
  font-size: 0.875rem;
  color: var(--color-text-on-dark-secondary);
  font-style: italic;
}

.funding__tiers {
  display: grid;
  gap: var(--space-md);
}

.funding__footnote {
  max-width: 820px;
  margin: var(--space-3xl) auto 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-text-on-dark-secondary);
  text-align: center;
}

.funding-tier {
  padding: var(--space-2xl);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.funding-tier:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.06);
}

.funding-tier--featured {
  background: rgba(217, 119, 6, 0.08);
  border-color: var(--color-accent);
  position: relative;
}

.funding-tier__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.25rem 0.75rem;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.funding-tier__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-on-dark-secondary);
  margin-bottom: var(--space-sm);
}

.funding-tier__amount {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-text-on-dark);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-xs);
}

.funding-tier__name {
  font-size: 0.875rem;
  color: var(--color-text-on-dark-secondary);
  margin-bottom: var(--space-lg);
}

.funding-tier__bar {
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  margin-bottom: var(--space-lg);
  overflow: hidden;
}

.funding-tier__fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-warm));
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.5s ease-out;
}

.funding-tier__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.funding-tier__list li {
  font-size: 0.875rem;
  color: var(--color-text-on-dark-secondary);
  padding-left: var(--space-lg);
  position: relative;
}

.funding-tier__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 5px;
  height: 5px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ========================================
   Timeline
   ======================================== */
.timeline {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

@media (min-width: 768px) {
  .timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }
}

.timeline__item {
  position: relative;
  padding-left: 56px;
  padding-bottom: var(--space-3xl);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

@media (min-width: 768px) {
  .timeline__item {
    padding-left: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }

  .timeline__item:nth-child(odd) .timeline__content {
    grid-column: 1;
    text-align: right;
  }

  .timeline__item:nth-child(odd) .timeline__marker {
    grid-column: 2;
    grid-row: 1;
  }

  .timeline__item:nth-child(even) .timeline__marker {
    grid-column: 1;
    justify-self: end;
  }

  .timeline__item:nth-child(even) .timeline__content {
    grid-column: 2;
  }
}

.timeline__marker {
  position: absolute;
  left: 8px;
  top: 0;
}

@media (min-width: 768px) {
  .timeline__marker {
    position: relative;
    left: auto;
  }
}

.timeline__phase {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.timeline__content {
  padding-top: 2px;
}

.timeline__period {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.timeline__content h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
}

.timeline__content ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.timeline__content li {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  padding-left: var(--space-lg);
  position: relative;
}

.timeline__content li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ========================================
   Year 1 Success — milestone narrative
   (vertical list with a hairline-numbered prefix; the capstone
   row uses a thicker amber rule to mark the year-end outcome)
   ======================================== */
.success__list {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  max-width: 760px;
}

.success__milestone {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-lg);
  align-items: baseline;
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .success__milestone {
    grid-template-columns: 5rem 1fr;
    gap: var(--space-2xl);
  }
}

.success__milestone:first-child { padding-top: 0; }

.success__milestone-count {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.03em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.success__milestone-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.success__milestone-body p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0;
}

.success__milestone-body p + p {
  margin-top: var(--space-sm);
}

.success__milestone-headline {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.015em;
  line-height: 1.35;
}

.success__milestone--capstone {
  grid-template-columns: 1fr;
  border-bottom: none;
  border-top: 2px solid var(--color-accent);
  margin-top: var(--space-md);
  padding-top: var(--space-2xl);
}

@media (min-width: 768px) {
  .success__milestone--capstone {
    grid-template-columns: 1fr;
    padding-left: 0;
  }
}

/* ========================================
   Contribution Tiers
   ======================================== */
.tiers__grid {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .tiers__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .tiers__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.tier-card {
  padding: var(--space-xl);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.tier-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--color-accent-glow);
}

.tier-card--featured {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
}

.tier-card__amount {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.tier-card__name {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.tier-card__perks {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.tier-card__perks li {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding-left: var(--space-lg);
  position: relative;
}

.tier-card__perks li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  background: var(--color-accent);
  border-radius: 50%;
}

.tiers__open {
  text-align: center;
  margin: 0 auto var(--space-2xl);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: 640px;
}

.tiers__open a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.tiers__open a:hover {
  color: var(--color-accent-hover);
}

.tiers__cta {
  text-align: center;
  margin-top: var(--space-3xl);
}

.tiers__cta-note {
  margin-top: var(--space-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.tiers__cta-note--major {
  margin-top: var(--space-sm);
}

.tiers__cta-note--major a {
  color: var(--color-accent);
  font-weight: 600;
}
.tiers__cta-note a {
  color: var(--color-accent);
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}
.tiers__cta-note a:hover {
  border-bottom-color: var(--color-accent);
}

/* Screen-reader-only utility (visually hidden, AT-reachable) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ========================================
   Final CTA
   ======================================== */
.cta__content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta__title {
  color: var(--color-text-on-dark);
  margin-bottom: var(--space-xl);
}

.cta__text {
  font-size: 1.0625rem;
  color: var(--color-text-on-dark-secondary);
  margin-bottom: var(--space-2xl);
  line-height: 1.75;
}

.cta__actions {
  margin-bottom: var(--space-3xl);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.cta__alt {
  padding-top: var(--space-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.cta__alt > p {
  color: var(--color-text-on-dark-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-lg);
}

.cta__alt-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  text-align: left;
  max-width: 480px;
  margin: 0 auto;
}

.cta__alt-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  font-size: 0.9375rem;
  color: var(--color-text-on-dark-secondary);
}

.cta__alt-item svg {
  flex-shrink: 0;
  color: var(--color-accent);
  margin-top: 2px;
}

.cta__alt-item strong {
  color: var(--color-text-on-dark);
}

/* Direct-contact block beneath the campaign CTA */
.cta__contact {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.cta__contact-label {
  color: var(--color-text-on-dark-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
}
.cta__contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}
.cta__contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0.625rem 1rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--color-text-on-dark);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 150ms ease, border-color 150ms ease, transform 150ms ease;
}
.cta__contact-link:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-1px);
}
.cta__contact-link svg {
  flex-shrink: 0;
  opacity: 0.85;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--color-bg-dark);
  padding: var(--space-3xl) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer__inner {
  display: grid;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

@media (min-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr auto;
    gap: var(--space-4xl);
  }
}

.footer__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}
@media (min-width: 640px) {
  .footer__links {
    grid-template-columns: repeat(3, auto);
    gap: var(--space-2xl);
  }
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--color-text-on-dark);
  margin-bottom: var(--space-md);
}

.footer__logo-img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: block;
  flex-shrink: 0;
}

.footer__tagline {
  font-size: 0.875rem;
  color: var(--color-text-on-dark-secondary);
  max-width: 300px;
  margin-bottom: var(--space-sm);
}

.footer__location {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer__col h4 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.footer__col a {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-on-dark-secondary);
  padding: 4px 0;
  transition: color var(--transition-fast);
}

.footer__col a:hover {
  color: var(--color-text-on-dark);
}

.footer__bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer__bottom p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ========================================
   Animations
   ======================================== */
.animate-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.7s ease forwards;
}

.animate-in:nth-child(1) { animation-delay: 0.1s; }
.animate-in:nth-child(2) { animation-delay: 0.2s; }
.animate-in:nth-child(3) { animation-delay: 0.3s; }
.animate-in:nth-child(4) { animation-delay: 0.4s; }
.animate-in:nth-child(5) { animation-delay: 0.5s; }

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .animate-in {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ========================================
   Utility & Responsive
   ======================================== */
@media (max-width: 639px) {
  .hero__provenance {
    font-size: 0.6875rem;
    line-height: 1.8;
  }
  .hero__provenance-sep {
    display: none;
  }
  .hero__provenance > * + * {
    display: block;
    margin-top: 0.35em;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline__item {
    padding-left: 56px;
    display: block;
  }

  .timeline__marker {
    position: absolute;
    left: 8px;
  }

  .timeline__item:nth-child(odd) .timeline__content {
    text-align: left;
  }
}

/* Selection color */
::selection {
  background: var(--color-accent-light);
  color: var(--color-text);
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Smooth scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-alt);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ========================================
   Inline citation link with hover tooltip
   Used for "quadratic funding" references that point to the
   original mechanism citation (Buterin, Hitzig & Weyl, 2018 /
   Wikipedia).
   ======================================== */
.qf-link {
  position: relative;
  color: var(--color-accent);
  border-bottom: 1px dotted var(--color-accent);
  text-decoration: none;
  cursor: help;
  transition: color 150ms ease, border-bottom-color 150ms ease, border-bottom-style 150ms ease;
  font-weight: inherit;
}
.qf-link:hover,
.qf-link:focus-visible {
  color: var(--color-accent-hover);
  border-bottom-color: var(--color-accent-hover);
  border-bottom-style: solid;
  outline: none;
}
.qf-link__tip {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 0.625rem 0.875rem;
  background: var(--color-bg-cta);
  color: var(--color-text-on-dark);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0;
  text-align: left;
  text-transform: none;
  width: max-content;
  max-width: 280px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease, visibility 0s linear 180ms;
  z-index: 60;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.18);
  white-space: normal;
}
.qf-link__tip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--color-bg-cta);
}
.qf-link__tip strong {
  color: var(--color-text-on-dark);
  font-weight: 600;
}
.qf-link__tip-meta {
  display: block;
  margin-top: 4px;
  color: var(--color-text-on-dark-secondary);
  font-size: 0.6875rem;
  font-style: italic;
}
.qf-link:hover .qf-link__tip,
.qf-link:focus-visible .qf-link__tip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  transition: opacity 180ms ease, transform 180ms ease, visibility 0s;
}
@media (max-width: 640px) {
  /* On narrow viewports a centred tip can clip; left-anchor it instead. */
  .qf-link__tip { left: 0; transform: translateX(0) translateY(4px); max-width: min(280px, calc(100vw - 32px)); }
  .qf-link__tip::after { left: 16px; transform: none; }
  .qf-link:hover .qf-link__tip,
  .qf-link:focus-visible .qf-link__tip { transform: translateX(0) translateY(0); }
}

/* ========================================
   Research pointer — discreet inline cross-link from a campaign
   section to the relevant discovery doc. One per section, placed
   at the bottom of the section container. Mono-eyebrow + amber
   link with arrow that translates on hover.
   ======================================== */
.research-pointer {
  margin: var(--space-3xl) auto 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  max-width: 760px;
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.research-pointer__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.research-pointer__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}
.research-pointer__link:hover {
  color: var(--color-accent-hover);
  border-bottom-color: var(--color-accent);
}
.research-pointer__link svg {
  transition: transform var(--transition-base);
}
.research-pointer__link:hover svg {
  transform: translateX(4px);
}

/* ========================================
   Skip-link (keyboard accessibility)
   ======================================== */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-lg);
  z-index: 100;
  padding: 0.625rem 1rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
  transition: top 180ms ease;
}
.skip-link:focus {
  top: var(--space-sm);
  outline: 3px solid rgba(255, 255, 255, 0.55);
  outline-offset: 2px;
}

/* ========================================
   Backstory Section
   ======================================== */
.backstory__grid {
  display: grid;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}
/* Asymmetric 2:1 layout — vision card spans both rows on the left,
   transparency and team stack on the right. Breaks the equal-card monoculture. */
@media (min-width: 768px) {
  .backstory__grid {
    grid-template-columns: 1.6fr 1fr;
    grid-template-rows: auto auto;
    gap: var(--space-xl);
    align-items: stretch;
  }
  .backstory-card:nth-child(1) {
    grid-row: 1 / span 2;
  }
  /* The wider card earns slightly larger type for visual hierarchy. */
  .backstory-card:nth-child(1) .backstory-card__title {
    font-size: 1.5rem;
  }
}

.backstory-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}
.backstory-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-border);
  box-shadow: 0 8px 24px var(--color-card-shadow);
}
.backstory-card__label {
  display: inline-block;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--color-accent);
}
.backstory-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1.25;
  margin: 0;
}
.backstory-card__body {
  color: var(--color-text-secondary);
  line-height: 1.65;
  font-size: 0.9375rem;
  margin: 0;
}
.backstory-card__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.backstory-card__list li {
  position: relative;
  padding-left: var(--space-md);
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.55;
}
.backstory-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
}
.backstory-card__list--principles li::before {
  background: var(--color-teal);
}
.backstory-card__list--principles li strong {
  color: var(--color-text);
}
.backstory-card__quote {
  font-style: italic;
  color: var(--color-text);
  font-size: 0.9375rem;
  margin: auto 0 0;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
  line-height: 1.5;
}

.backstory__legacy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-lg);
  padding: var(--space-lg) var(--space-xl);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
}
.backstory__legacy-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 56ch;
}
.backstory__legacy-eyebrow {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--color-text-muted);
}
.backstory__legacy-note {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.5;
}
.backstory__legacy-cta { flex-shrink: 0; }

/* ========================================
   Donate With Crypto Section
   ======================================== */
.crypto__primary {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
  position: relative;
  overflow: hidden;
}
.crypto__primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, var(--color-accent-glow), transparent 60%);
  pointer-events: none;
}
.crypto__primary-text {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 56ch;
}
.crypto__primary-eyebrow {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 2px;
}
.crypto__primary-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.015em;
  margin: 0;
}
.crypto__primary-desc {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.55;
}
.crypto__primary-cta {
  position: relative;
  flex-shrink: 0;
}

.crypto__addresses {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.crypto__addresses-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  font-weight: 700;
  margin: 0 0 var(--space-sm);
}

.crypto-address {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transition: border-color var(--transition-base);
}
.crypto-address:hover { border-color: var(--color-border); }
.crypto-address__header {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.crypto-address__chain {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.005em;
}
.crypto-address__networks {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}
.crypto-address__row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
}
.crypto-address__value {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text);
  flex: 1;
  word-break: break-all;
  background: transparent;
  padding: 0;
  line-height: 1.4;
}
.crypto-address__copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  min-height: 40px;
  padding: 0.5rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  font-family: var(--font-sans);
}
.crypto-address__copy:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}
.crypto-address__copy.copied {
  background: var(--color-teal-light);
  border-color: var(--color-teal);
  color: var(--color-teal);
}

.crypto__note {
  margin-top: var(--space-xl);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  text-align: center;
  line-height: 1.6;
}
.crypto__note a {
  color: var(--color-accent);
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}
.crypto__note a:hover {
  border-bottom-color: var(--color-accent);
}

@media (max-width: 640px) {
  .crypto__primary { padding: var(--space-lg); flex-direction: column; align-items: flex-start; }
  .crypto-address__row { flex-direction: column; align-items: stretch; gap: var(--space-sm); }
  .crypto-address__copy { justify-content: center; }
  .backstory__legacy { padding: var(--space-md) var(--space-lg); }
}

/* --- CTA crypto note (small mention in Final CTA) --- */
.cta__crypto-note {
  margin-top: var(--space-md);
  font-size: 0.9375rem;
  color: var(--color-text-on-dark-secondary);
  text-align: center;
}

.cta__crypto-note a {
  color: var(--color-accent-warm);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 158, 11, 0.4);
  transition: border-color 0.2s ease;
}

.cta__crypto-note a:hover {
  border-bottom-color: var(--color-accent-warm);
}

/* --- Stay close — mailing-list section ---
   Scene: a healer or supporter sitting with their phone after reading
   the campaign on a kitchen table. The form should feel like an invitation,
   not a marketing capture. Two-column asymmetric — copy left (smaller),
   form right (larger) — so the form is the gravity well, not the headline. */
.section--stay-close {
  background: var(--color-bg);
}

.stay-close__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  max-width: 64rem;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .stay-close__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-3xl);
    align-items: start;
  }
}

.stay-close__intro {
  max-width: 28rem;
}

.stay-close__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.stay-close__title {
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin: 0 0 var(--space-md);
}

.stay-close__lede {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-md);
}

.stay-close__note {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin: 0;
}

/* Form column — sits on a quiet card so it reads as a discrete input zone */
.stay-close__form {
  background: var(--color-bg-warm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .stay-close__form { padding: var(--space-2xl); }
}

.stay-close__field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.stay-close__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.stay-close__input {
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.5;
  padding: 0.75rem 0.9375rem;
  min-height: 44px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  -webkit-appearance: none;
}

.stay-close__input::placeholder {
  color: var(--color-text-muted);
}

.stay-close__input:hover {
  border-color: #D1D5DB;
}

.stay-close__input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.stay-close__input[aria-invalid="true"] {
  border-color: #B91C1C;
}

.stay-close__input[aria-invalid="true"]:focus {
  box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.15);
}

.stay-close__err {
  font-size: 0.8125rem;
  line-height: 1.4;
  color: #B91C1C;
  margin: 0;
  min-height: 1.1em;
}

.stay-close__err:empty { display: none; }

.stay-close__fieldset {
  border: 0;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.stay-close__legend {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 0;
  margin-bottom: 0.125rem;
  letter-spacing: 0.01em;
}

.stay-close__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.stay-close__pill {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

.stay-close__pill input[type="radio"] {
  position: absolute;
  opacity: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}

.stay-close__pill span {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.stay-close__pill:hover span {
  border-color: #D1D5DB;
  color: var(--color-text);
}

.stay-close__pill input[type="radio"]:focus-visible + span {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.stay-close__pill input[type="radio"]:checked + span {
  background: var(--color-accent);
  color: var(--color-text-on-dark);
  border-color: var(--color-accent);
}

/* Honeypot — visually hidden but accessible to bots */
.stay-close__honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.stay-close__submit {
  align-self: flex-start;
  min-width: 12rem;
  position: relative;
}

.stay-close__submit-spinner {
  display: none;
  margin-left: 0.5rem;
}

.stay-close__submit-spinner svg {
  animation: stay-close-spin 0.8s linear infinite;
}

@keyframes stay-close-spin {
  to { transform: rotate(360deg); }
}

.stay-close__form.is-submitting .stay-close__submit-spinner {
  display: inline-flex;
}

.stay-close__form.is-submitting .stay-close__submit {
  cursor: progress;
}

.stay-close__submit:disabled {
  opacity: 0.85;
}

.stay-close__feedback {
  min-height: 0;
}

.stay-close__feedback:empty { display: none; }

.stay-close__msg {
  margin: 0;
  padding: 0.875rem 1rem;
  font-size: 0.9375rem;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
}

.stay-close__msg--success {
  background: #ECFDF5;
  border-color: #A7F3D0;
  color: #065F46;
}

.stay-close__msg--info {
  background: var(--color-bg-warm-tint);
  border-color: #FDE68A;
  color: #92400E;
}

.stay-close__msg--error {
  background: #FEF2F2;
  border-color: #FECACA;
  color: #991B1B;
}

.stay-close__msg--error a {
  color: inherit;
  font-weight: 600;
  text-decoration: underline;
}

@media (max-width: 640px) {
  .stay-close__pills { gap: 0.4375rem; }
  .stay-close__form { padding: var(--space-lg); }
  .stay-close__submit { align-self: stretch; min-width: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .stay-close__submit-spinner svg { animation: none; }
}