:root {
  --navy: #0a192f;
  --navy-2: #102944;
  --cyan: #00d9ee;
  --cyan-dark: #1598a8;
  --white: #ffffff;
  --ice: #edf8fb;
  --mist: #f6fafc;
  --text: #12304a;
  --muted: #607384;
  --line: rgba(10, 25, 47, 0.14);
  --shadow: 0 18px 46px rgba(10, 25, 47, 0.15);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(10, 25, 47, 0.96);
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--white);
}

.brand strong,
.footer-brand span {
  display: block;
  font-size: 18px;
  letter-spacing: 0;
}

.brand small {
  display: block;
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  padding: 9px 12px;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.site-nav .nav-cta {
  color: var(--navy);
  background: var(--cyan);
}

.menu-toggle {
  display: none;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 6px;
  padding: 8px 12px;
  color: var(--white);
  background: transparent;
  font-weight: 800;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(280px, 0.72fr);
  align-items: center;
  gap: clamp(28px, 5vw, 70px);
  min-height: calc(100vh - 77px);
  padding: clamp(56px, 8vw, 96px) clamp(20px, 6vw, 78px);
  color: var(--white);
  background:
    radial-gradient(circle at 82% 18%, rgba(0, 217, 238, 0.22), transparent 28%),
    linear-gradient(130deg, #061426 0%, #0a192f 48%, #123a5b 100%);
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.impact-section h2,
.split-section h2,
.support-section h2 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 820px;
  font-size: clamp(42px, 6vw, 78px);
}

.hero p:not(.eyebrow) {
  max-width: 690px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions,
.support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 20px;
  border: 0;
  border-radius: 6px;
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
}

.button.primary {
  color: var(--navy);
  background: var(--cyan);
}

.button.secondary {
  color: var(--white);
  background: var(--navy);
}

.button.light {
  color: var(--navy);
  background: var(--white);
}

.hero-visual {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 18px;
}

.hero-visual img {
  width: min(100%, 420px);
  border-radius: 50%;
  background: var(--white);
  box-shadow: var(--shadow);
}

.hero-stat {
  width: min(100%, 350px);
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.hero-stat strong {
  display: block;
  color: var(--cyan);
  font-size: 40px;
  line-height: 1;
}

.hero-stat span {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.84);
  font-weight: 700;
}

.section {
  padding: clamp(58px, 8vw, 98px) clamp(20px, 6vw, 78px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.center {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-heading h2,
.impact-section h2,
.split-section h2,
.support-section h2 {
  color: var(--navy);
  font-size: clamp(32px, 4vw, 52px);
}

.story-section {
  background: var(--mist);
}

.story-grid,
.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.78fr);
  gap: 26px;
  align-items: start;
}

.story-grid article,
.mission-panel,
.program-card,
.contact-form,
.faq-list details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 28px rgba(10, 25, 47, 0.07);
}

.story-grid article,
.mission-panel {
  padding: clamp(22px, 3vw, 34px);
}

h3 {
  margin: 0 0 10px;
  color: var(--navy);
  font-size: 22px;
}

p {
  color: var(--muted);
}

.mission-panel {
  border-top: 5px solid var(--cyan);
}

.program-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.program-card {
  padding: 24px;
  border-color: rgba(0, 217, 238, 0.4);
}

.program-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  border-radius: 50%;
  color: var(--navy);
  background: var(--cyan);
  font-weight: 900;
}

.impact-section {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) repeat(2, minmax(180px, 0.55fr));
  gap: 18px;
  align-items: stretch;
  padding: clamp(50px, 7vw, 82px) clamp(20px, 6vw, 78px);
  background: var(--navy);
}

.impact-section h2,
.impact-section p {
  color: var(--white);
}

.impact-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 190px;
  padding: 22px;
  border: 1px solid rgba(0, 217, 238, 0.34);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.impact-card strong {
  color: var(--cyan);
  font-size: 46px;
  line-height: 1;
}

.impact-card span {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.84);
  font-weight: 700;
}

.split-section {
  align-items: center;
  background: var(--ice);
}

.contact-form {
  display: grid;
  gap: 14px;
  padding: 22px;
}

.contact-form label {
  display: grid;
  gap: 6px;
  color: var(--navy);
  font-size: 14px;
  font-weight: 800;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;
  color: var(--text);
  font: inherit;
}

.support-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(54px, 7vw, 84px) clamp(20px, 6vw, 78px);
  color: var(--white);
  background:
    linear-gradient(rgba(10, 25, 47, 0.88), rgba(10, 25, 47, 0.88)),
    url("assets/arc-logo.png") center right 8% / 360px no-repeat,
    var(--navy);
}

.support-section h2,
.support-section p {
  color: var(--white);
}

.support-copy {
  max-width: 760px;
}

.quote-section {
  text-align: center;
}

blockquote {
  max-width: 920px;
  margin: 0 auto;
  color: var(--navy);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  line-height: 1.12;
}

.quote-section p {
  margin-top: 18px;
  color: var(--cyan-dark);
  font-weight: 900;
}

.faq-section {
  background: var(--mist);
}

.faq-list {
  display: grid;
  max-width: 920px;
  gap: 12px;
  margin: 0 auto;
}

.faq-list details {
  padding: 18px 20px;
}

.faq-list summary {
  color: var(--navy);
  font-weight: 900;
  cursor: pointer;
}

.site-footer {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 28px;
  padding: 42px clamp(20px, 6vw, 78px);
  color: var(--white);
  background: var(--navy);
}

.site-footer p,
.site-footer a {
  color: rgba(255, 255, 255, 0.78);
}

.site-footer h2 {
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 16px;
}

.footer-brand img {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--white);
}

@media (max-width: 900px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border-radius: 8px;
    background: var(--navy-2);
  }

  .site-nav.open {
    display: flex;
  }

  .hero,
  .story-grid,
  .split-section,
  .impact-section,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

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

  .support-section {
    align-items: flex-start;
    flex-direction: column;
    background-size: 260px;
  }
}

@media (max-width: 560px) {
  .brand small {
    display: none;
  }

  .hero-actions,
  .support-actions {
    width: 100%;
  }

  .button {
    width: 100%;
  }

  .hero h1 {
    font-size: 40px;
  }
}