:root {
  --blue: #1f5eff;
  --dark-blue: #103079;
  --ink: #142033;
  --muted: #617085;
  --line: #dfe6f2;
  --pale: #f4f7fc;
  --white: #ffffff;
  --accent: #f0b44c;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Raleway", "Century Gothic", "Trebuchet MS", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--dark-blue);
  letter-spacing: 0;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
}

.main-nav a:hover {
  color: var(--blue);
}

.hero {
  min-height: 620px;
  display: grid;
  align-items: center;
  padding: 80px clamp(20px, 7vw, 96px);
  color: var(--white);
  background:
    linear-gradient(110deg, rgba(12, 32, 84, 0.88), rgba(31, 94, 255, 0.45)),
    radial-gradient(circle at 80% 20%, rgba(240, 180, 76, 0.45), transparent 32%),
    linear-gradient(135deg, #142033, #1f5eff);
}

.hero-content {
  max-width: 820px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #dce7ff;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 920px;
  margin-bottom: 24px;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.02;
  letter-spacing: 0;
  font-weight: 800;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.25;
  font-weight: 800;
}

.hero-text {
  max-width: 700px;
  font-size: 22px;
  color: #eaf0ff;
}

.hero-actions,
.center-action {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
}

.button.primary {
  color: var(--white);
  background: var(--blue);
}

.button.secondary {
  color: var(--dark-blue);
  background: var(--white);
  border-color: var(--line);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

.badges span,
.format-list span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 7px 13px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 999px;
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
}

.section {
  padding: 80px clamp(20px, 7vw, 96px);
}

.two-column,
.contact-section,
.summer-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 44px;
  align-items: start;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.tinted {
  background: var(--pale);
}

.feature-grid,
.area-grid,
.course-preview-grid,
.steps,
.culture-grid,
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.area-grid article,
.course-card,
.steps article,
.culture-grid article,
.catalog-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.feature-card p,
.area-grid p,
.course-card p,
.steps p,
.culture-grid p,
.catalog-card p {
  color: var(--muted);
}

.format-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.format-list span {
  color: var(--dark-blue);
  border-color: var(--line);
  background: var(--pale);
}

.summer-section {
  color: var(--white);
  background:
    linear-gradient(115deg, rgba(16, 48, 121, 0.96), rgba(31, 94, 255, 0.76)),
    radial-gradient(circle at 86% 12%, rgba(240, 180, 76, 0.55), transparent 30%),
    #103079;
}

.summer-section .eyebrow,
.summer-section p {
  color: #eaf0ff;
}

.summer-copy {
  max-width: 720px;
}

.summer-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.summer-panel div {
  min-height: 118px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
}

.summer-panel span {
  display: block;
  margin-bottom: 8px;
  color: #dce7ff;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.summer-panel strong {
  display: block;
  font-size: 18px;
  line-height: 1.35;
}

.culture-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 30px;
}

.culture-grid article {
  color: var(--ink);
  background: var(--white);
}

.steps {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.steps span {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  border-radius: 50%;
  color: var(--white);
  background: var(--blue);
  font-weight: 800;
}

.contact-details {
  margin-top: 24px;
  color: var(--muted);
}

.contact-details a {
  color: var(--blue);
  font-weight: 700;
}

.contact-form {
  display: grid;
  gap: 14px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--pale);
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 13px 14px;
  font: inherit;
  color: var(--ink);
  background: var(--white);
}

.catalog-hero {
  padding: 80px clamp(20px, 7vw, 96px);
  color: var(--white);
  background:
    linear-gradient(120deg, rgba(20, 32, 51, 0.94), rgba(31, 94, 255, 0.72)),
    #142033;
}

.catalog-hero .eyebrow,
.catalog-hero p {
  color: #eaf0ff;
}

.catalog-hero p {
  max-width: 680px;
  font-size: 20px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.filter {
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--dark-blue);
  background: var(--white);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.filter.active,
.filter:hover {
  color: var(--white);
  background: var(--blue);
  border-color: var(--blue);
}

.filter:focus-visible,
.button:focus-visible,
.main-nav a:focus-visible,
.logo:focus-visible {
  outline: 3px solid rgba(240, 180, 76, 0.72);
  outline-offset: 3px;
}

.catalog-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.featured-course {
  border-color: rgba(31, 94, 255, 0.34);
  background: linear-gradient(180deg, #ffffff 0%, #f6f9ff 100%);
}

.catalog-card h2 {
  font-size: 24px;
}

.catalog-card dl {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
  margin: 20px 0 0;
}

.catalog-card dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.catalog-card dd {
  margin: 0;
  font-weight: 700;
}

.featured-card {
  border-color: rgba(31, 94, 255, 0.28);
  background: #f6f9ff;
}

.cta-strip {
  text-align: center;
  background: var(--pale);
}

.cta-strip p {
  color: var(--muted);
}

@media (max-width: 920px) {
  .site-header,
  .two-column,
  .contact-section,
  .summer-layout {
    grid-template-columns: 1fr;
  }

  .site-header {
    display: grid;
  }

  .feature-grid,
  .area-grid,
  .course-preview-grid,
  .steps,
  .culture-grid,
  .catalog-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .hero,
  .section,
  .catalog-hero {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero {
    min-height: 560px;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 30px;
  }

  .feature-grid,
  .area-grid,
  .course-preview-grid,
  .steps,
  .culture-grid,
  .catalog-grid,
  .summer-panel {
    grid-template-columns: 1fr;
  }

  .main-nav {
    gap: 12px;
  }
}