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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  max-width: 100%;
}

::selection {
  background: var(--color-selection);
}

a {
  color: var(--color-accent-blue);
  text-decoration: none;
}

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

img {
  max-width: 100%;
}

/* ---------- animations ---------- */

@keyframes node-pulse {
  0%,
  100% {
    opacity: 0.75;
    r: var(--r);
  }
  50% {
    opacity: 1;
    r: calc(var(--r) * 1.35);
  }
}

@keyframes line-flow {
  to {
    stroke-dashoffset: -24;
  }
}

.net-node {
  animation: node-pulse 3.2s ease-in-out infinite;
  transform-origin: center;
}

.net-line {
  stroke-dasharray: 4 8;
  animation: line-flow 1.6s linear infinite;
}

@keyframes drift-up {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  15% {
    opacity: 0.8;
  }
  85% {
    opacity: 0.8;
  }
  100% {
    transform: translateY(-140px);
    opacity: 0;
  }
}

.drift-dot {
  animation: drift-up 6s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .net-node,
  .net-line,
  .drift-dot {
    animation: none;
  }
}

/* ---------- layout helpers ---------- */

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.eyebrow--blue {
  color: var(--color-accent-blue);
}

.eyebrow--gold {
  color: var(--color-accent-gold);
}

.section-heading {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 38px;
  margin: 0;
}

/* ---------- buttons ---------- */

.btn {
  font-size: 16px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  display: inline-block;
  border: 1.5px solid transparent;
  cursor: pointer;
  font-family: inherit;
  line-height: 1.2;
  text-align: center;
}

.btn-primary {
  color: var(--color-bg);
  background: var(--color-ink);
}

.btn-primary:hover {
  color: var(--color-bg);
  opacity: 0.92;
}

.btn-outline {
  color: var(--color-ink);
  background: transparent;
  border-color: var(--color-border-outline);
}

.btn-outline:hover {
  color: var(--color-ink);
  background: var(--color-bg-muted);
}

.btn--small {
  font-size: 15px;
  padding: 12px 24px;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg-header);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
}

.site-header__brand {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.site-header__nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink);
}

.site-header__cta {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-bg) !important;
  background: var(--color-accent-blue);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
}

.site-header__toggle {
  display: none;
}

/* ---------- hero ---------- */

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
  padding: 56px 48px 88px;
  max-width: var(--container-max-wide);
  margin: 0 auto;
}

.hero__badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent-blue);
  background: var(--color-accent-blue-soft);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
}

.hero__headline {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 56px;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 24px;
}

.hero__subheading {
  font-size: 19px;
  line-height: 1.6;
  color: var(--color-ink-muted-strong);
  margin: 0 0 36px;
  max-width: 52ch;
}

.hero__ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__graphic {
  width: 100%;
  height: 420px;
  position: relative;
  -webkit-mask-image: linear-gradient(to right, black 45%, transparent 92%);
  mask-image: linear-gradient(to right, black 45%, transparent 92%);
}

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

/* ---------- pull quote ---------- */

.pull-quote {
  background: var(--color-bg-dark);
  color: var(--color-on-dark);
  padding: 40px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.pull-quote__field {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.5;
}

.pull-quote__text {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 28px;
  font-weight: 500;
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.45;
  position: relative;
}

/* ---------- how it works ---------- */

.how-it-works {
  padding: 64px 48px;
  max-width: var(--container-max);
  margin: 0 auto;
}

.how-it-works__intro {
  text-align: center;
  margin-bottom: 64px;
}

.how-it-works__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.how-it-works__number {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 600;
  color: var(--color-accent-blue);
  margin-bottom: 16px;
}

.how-it-works__title {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 10px;
}

.how-it-works__body {
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-ink-muted);
  margin: 0;
}

/* ---------- what we help with ---------- */

.help-with {
  background: var(--color-bg-muted);
  padding: 64px 48px 40px;
  background-image: radial-gradient(var(--color-border) 1.5px, transparent 1.5px);
  background-size: 28px 28px;
}

.help-with__inner {
  max-width: var(--container-max);
  margin: 0 auto;
}

.help-with__intro {
  text-align: center;
  margin-bottom: 56px;
}

.help-with__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.card__title {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 10px;
}

.card__body {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-ink-muted);
  margin: 0;
}

/* ---------- why people join ---------- */

.why-join {
  background: var(--color-bg-muted);
  padding: 40px 48px 64px;
}

.why-join__inner {
  max-width: var(--container-max);
  margin: 0 auto;
}

.why-join__intro {
  text-align: center;
  margin-bottom: 56px;
}

.why-join__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.why-join__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 36px;
}

.why-join__card-title {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 12px;
}

.why-join__card-body {
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-ink-muted);
  margin: 0;
}

/* ---------- audience cards ---------- */

.audience {
  padding: 64px 48px;
  max-width: var(--container-max);
  margin: 0 auto;
}

.audience__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.audience-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 44px;
}

.audience-card__heading {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 27px;
  margin: 0 0 16px;
}

.audience-card__body {
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-ink-muted);
  margin: 0 0 24px;
}

/* ---------- university partners ---------- */

.university-partners {
  background: var(--color-accent-blue-soft-strip);
  padding: 48px 48px;
  text-align: center;
}

.university-partners__eyebrow {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent-blue);
  margin: 0 0 16px;
}

.university-partners__body {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.5;
}

/* ---------- about ---------- */

.about {
  padding: 64px 48px;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.about__heading {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 34px;
  margin: 0 0 20px;
}

.about__body {
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-ink-muted);
  margin: 0;
}

/* ---------- footer ---------- */

.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-on-dark);
  padding: 56px 48px 40px;
  position: relative;
  overflow: hidden;
}

.site-footer__top {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-on-dark-border);
}

.site-footer__title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 22px;
  margin-bottom: 14px;
}

.site-footer__tagline {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-on-dark-65);
  max-width: 34ch;
  margin: 0;
}

.site-footer__group-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-on-dark-55);
  margin-bottom: 16px;
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__links a,
.site-footer__links button {
  font-size: 15px;
  color: var(--color-on-dark-85);
  background: none;
  border: none;
  padding: 0;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
}

.site-footer__copyright {
  font-size: 13px;
  color: var(--color-on-dark-45);
  margin: 24px 0 0;
  text-align: center;
}

/* ---------- modals ---------- */

dialog.modal {
  padding: 0;
  border: none;
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  box-shadow: 0 24px 64px oklch(0.15 0.01 80 / 0.3);
  background: var(--color-bg);
  color: var(--color-ink);
}

dialog.modal::backdrop {
  background: var(--color-overlay);
}

.modal__header {
  background: var(--color-bg-dark);
  color: var(--color-on-dark);
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal__close {
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
  opacity: 0.8;
  background: none;
  border: none;
  color: inherit;
  padding: 0;
}

.modal__close:hover {
  opacity: 1;
}

.modal__body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink-muted);
  display: block;
  margin-bottom: 6px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1.5px solid var(--color-input-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font-size: 15px;
  color: var(--color-ink);
  background: var(--color-input-bg);
  font-family: inherit;
}

.field textarea {
  min-height: 64px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 1px;
}

.field--honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.modal__submit {
  width: 100%;
}

.modal__status {
  font-size: 14px;
  margin: 0;
}

.modal__status--error {
  color: oklch(0.55 0.18 25);
}

.modal__thanks {
  padding: 40px 28px;
  text-align: center;
}

.modal__thanks h4 {
  font-family: var(--font-serif);
  font-size: 22px;
  margin: 0 0 8px;
}

.modal__thanks p {
  color: var(--color-ink-muted);
  margin: 0;
}

.hidden {
  display: none !important;
}

/* ---------- responsive ---------- */

@media (max-width: 960px) {
  .site-header {
    padding: 16px 24px;
  }

  .site-header__nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 40px 24px 56px;
    gap: 40px;
  }

  .hero__graphic {
    height: 280px;
    order: -1;
    -webkit-mask-image: none;
    mask-image: none;
  }

  .hero__headline {
    font-size: 38px;
  }

  .how-it-works,
  .audience,
  .about {
    padding: 48px 24px;
  }

  .how-it-works__grid,
  .why-join__grid {
    grid-template-columns: 1fr;
  }

  .help-with,
  .why-join {
    padding-left: 24px;
    padding-right: 24px;
  }

  .help-with__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .audience__grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    padding: 48px 24px 32px;
  }

  .site-footer__top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 560px) {
  .help-with__grid {
    grid-template-columns: 1fr;
  }

  .section-heading {
    font-size: 30px;
  }

  .hero__headline {
    font-size: 32px;
  }
}