/* --- Design tokens --- */
:root {
  --color-bg: #f5f7fa;
  --color-bg-alt: #eef1f7;
  --color-surface: #ffffff;
  --color-text: #0d1117;
  --color-text-muted: #4a5568;
  --color-border: #d1d9e6;
  --color-accent: #1a56db;
  --color-accent-hover: #1341b0;
  --color-cta: #0891b2;
  --color-cta-hover: #0e7490;
  --color-highlight-bg: #e8f0fe;
  --color-error: #b91c1c;
 
  --font-serif: "Newsreader", Georgia, "Times New Roman", serif;
  --font-sans: "Source Sans 3", system-ui, sans-serif;
 
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 5rem;
 
  --radius-sm: 4px;
  --radius-md: 8px;
 
  --header-height: 3.75rem;
  --max-width: 42rem;
  --max-width-wide: 64rem;
  --transition: 0.15s ease;
}
 
/* --- Reset --- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
 
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}
 
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}
 
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
 
a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition);
}
 
a:hover {
  color: var(--color-accent-hover);
}
 
ul, ol {
  margin: 0;
  padding: 0;
}
 
h1, h2, h3, p {
  margin: 0;
}
 
/* --- Layout --- */
.container {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-md);
}
 
.container--narrow {
  max-width: var(--max-width);
}
 
.section {
  padding: var(--space-2xl) 0;
}
 
.section--alt {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
 
.section-label {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-cta);
  margin-bottom: var(--space-xs);
}
 
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.01em;
  color: var(--color-text);
}
 
.section-intro {
  color: var(--color-text-muted);
  max-width: 34rem;
  margin-bottom: var(--space-lg);
  font-size: 1.0625rem;
}
 
/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6875rem 1.375rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition), color var(--transition), box-shadow var(--transition);
}
 
.btn--apply {
  background-color: var(--color-accent);
  color: #fff;
  box-shadow: 0 1px 3px rgba(26, 86, 219, 0.25);
}
 
.btn--apply:hover {
  background-color: var(--color-accent-hover);
  color: #fff;
  box-shadow: 0 2px 6px rgba(26, 86, 219, 0.3);
}
 
.btn--lg {
  padding: 0.8125rem 1.625rem;
  font-size: 1.0625rem;
}
 
.btn--full {
  width: 100%;
}
 
.btn--outline {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  text-decoration: none;
}
 
.btn--outline:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
  border-color: var(--color-accent);
}
 
/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(245, 247, 250, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}
 
.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
}
 
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width-wide);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--space-md);
}
 
.nav__logo {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
 
.nav__logo:hover {
  color: var(--color-accent);
}
 
.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
}
 
.nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}
 
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
 
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}
 
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
 
.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}
 
.nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
 
.nav__link:hover,
.nav__link.is-active {
  color: var(--color-text);
}
 
.nav__link--apply {
  padding: 0.4375rem 1rem;
  color: #fff !important;
  background-color: var(--color-accent);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background-color var(--transition);
}
 
.nav__link--apply:hover {
  background-color: var(--color-accent-hover);
  color: #fff !important;
}
 
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }
 
  .nav__menu {
    position: fixed;
    top: 0;
    right: 0;
    width: min(88vw, 17rem);
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-xl) var(--space-md);
    background: var(--color-bg);
    border-left: 1px solid var(--color-border);
    transform: translateX(100%);
    transition: transform 0.25s ease;
  }
 
  .nav__menu.is-open {
    transform: translateX(0);
  }
 
  .nav__link--apply {
    width: 100%;
    text-align: center;
    margin-top: var(--space-xs);
  }
}
 
@media (min-width: 769px) {
  .nav__toggle {
    display: none;
  }
}
 
/* --- Hero --- */
.hero {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: calc(var(--header-height) + var(--space-2xl)) var(--space-md) var(--space-xl);
}
 
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  margin-bottom: var(--space-md);
  padding: 0.3125rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-cta);
  background: rgba(8, 145, 178, 0.08);
  border: 1px solid rgba(8, 145, 178, 0.2);
  border-radius: 999px;
}
 
.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.12;
  max-width: 16ch;
  margin-bottom: var(--space-md);
  color: var(--color-text);
  letter-spacing: -0.02em;
}
 
.hero__text {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 36rem;
  margin-bottom: var(--space-lg);
}
 
.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}
 
.hero__stat {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 0.35rem;
  padding: 0;
  background: none;
  border: none;
  min-width: auto;
}
 
.hero__stat-value {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-accent);
}
 
.hero__stat-label {
  font-size: 0.9375rem;
  text-transform: none;
  letter-spacing: 0;
}
 
.hero__stat:not(:last-child)::after {
  content: "·";
  margin-left: var(--space-lg);
  color: var(--color-border);
  font-weight: 400;
}
 
@media (max-width: 480px) {
  .hero__stat:not(:last-child)::after {
    display: none;
  }
 
  .hero__stats {
    flex-direction: column;
    gap: var(--space-xs);
  }
}

.hero__inner {
  max-width: 48rem;
}



/* --- About --- */
.about__text {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: var(--max-width);
  line-height: 1.75;
}

/* --- Timeline / Program --- */
.timeline {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
  padding: 0;
}

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

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

.timeline__item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.timeline__item:hover {
  border-color: rgba(26, 86, 219, 0.3);
  box-shadow: 0 2px 12px rgba(26, 86, 219, 0.07);
}

.timeline__item--highlight {
  background: #0d1117;
  border-color: var(--color-accent);
  margin: 0;
  padding: var(--space-md);
}

.timeline__item--highlight .timeline__week {
  color: var(--color-cta);
}

.timeline__item--highlight .timeline__title {
  color: #f0f4ff;
}

.timeline__item--highlight p {
  color: #8b95a3;
}

.timeline__week {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.timeline__title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

.timeline__content p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}
 
.program-cta {
  margin-top: var(--space-lg);
}
 
/* --- Feature cards --- */
.cards {
  display: grid;
  gap: var(--space-md);
}
 
.cards--three {
  grid-template-columns: 1fr;
}
 
@media (min-width: 768px) {
  .cards--three {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
  }
}
 
.card {
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}
 
.card:hover {
  border-color: rgba(26, 86, 219, 0.3);
  box-shadow: 0 2px 12px rgba(26, 86, 219, 0.07);
}
 
.card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.125rem;
  background: rgba(8, 145, 178, 0.08);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  color: var(--color-cta);
}
 
.card__title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}
 
.card__text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}
 
/* --- Audience --- */
.audience__text {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}
 
.audience__note {
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 1rem;
}
 
/* --- Apply --- */
.apply__header {
  max-width: var(--max-width);
  margin-bottom: var(--space-lg);
}
 
.apply__note {
  color: var(--color-text-muted);
  font-size: 1rem;
}
 
.apply__grid {
  display: grid;
  gap: var(--space-lg);
}
 
@media (min-width: 900px) {
  .apply__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}
 
.apply-card {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}
 
.apply-card--primary {
  border-color: rgba(26, 86, 219, 0.25);
  box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.04);
}
 
.apply-card--secondary {
  background: var(--color-bg-alt);
}
 
.apply-card__heading {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}
 
.apply-card__text {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  line-height: 1.65;
}
 
.apply__email {
  margin-top: var(--space-md);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}
 
.apply__email a {
  font-weight: 600;
  text-decoration: underline;
  color: var(--color-accent);
}
 
/* --- Footer --- */
.site-footer {
  background: #0d1117;
  color: #8b95a3;
  padding-top: var(--space-xl);
  border-top: 1px solid #1e2530;
}
 
.site-footer a {
  color: #c9d3e0;
  text-decoration: underline;
}
 
.site-footer a:hover {
  color: #e8f0fe;
}
 
.site-footer__inner {
  display: grid;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
}
 
@media (min-width: 640px) {
  .site-footer__inner {
    grid-template-columns: 1.5fr 1fr;
  }
}
 
.site-footer__logo {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 700;
  color: #e8f0fe;
  margin-bottom: var(--space-sm);
  text-decoration: none;
  letter-spacing: -0.01em;
}
 
.site-footer__logo:hover {
  color: #ffffff;
}
 
.site-footer__mission {
  font-size: 0.9375rem;
  line-height: 1.65;
  max-width: 26rem;
  color: #8b95a3;
}
 
.site-footer__heading {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #c9d3e0;
  margin-bottom: var(--space-sm);
}
 
.site-footer__email {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: #e8f0fe;
  margin-bottom: var(--space-md);
  text-decoration: underline;
}
 
.site-footer__social {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}
 
.site-footer__social a {
  font-size: 0.9375rem;
  color: #8b95a3;
}
 
.site-footer__social a:hover {
  color: #e8f0fe;
}
 
.site-footer__bottom {
  border-top: 1px solid #1e2530;
  padding: var(--space-md);
  text-align: left;
  font-size: 0.8125rem;
  color: #8b95a3;
}
 
.site-footer__bottom p {
  margin: 0;
  max-width: var(--max-width-wide);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--space-md);
}