:root {
  --bg: #f4f1ea;
  --surface: #ffffff;
  --surface-soft: #eef2f4;
  --text: #1f2b34;
  --muted: #68747d;
  --blue: #2457a6;
  --blue-dark: #17365f;
  --yellow: #f0c84b;
  --line: rgba(31, 43, 52, 0.12);
  --radius: 22px;
  --shadow: 0 18px 48px rgba(31, 43, 52, 0.09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 8%, rgba(36, 87, 166, 0.12), transparent 24rem),
    linear-gradient(180deg, #fbfaf6, var(--bg));
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.5;
}

body.menu-open {
  overflow: hidden;
}

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

.site-header,
.briefing,
.status-strip,
.course-board,
.checklist {
  width: min(100% - clamp(28px, 6vw, 96px), 1120px);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  backdrop-filter: blur(16px);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: var(--blue);
  color: #ffffff;
  box-shadow: 0 12px 28px rgba(36, 87, 166, 0.22);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  box-shadow: 0 12px 32px rgba(31, 43, 52, 0.06);
}

.site-nav a {
  min-height: 40px;
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 800;
  transition: color 180ms ease, background 180ms ease, transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  background: var(--surface);
  transform: translateY(-1px);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
}

.language-switch button {
  min-width: 40px;
  min-height: 32px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 900;
}

.language-switch button:hover,
.language-switch button:focus-visible,
.language-switch button.is-active {
  color: #ffffff;
  background: var(--blue);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  border-radius: 999px;
  background: currentColor;
}

.briefing {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  gap: clamp(18px, 4vw, 42px);
  align-items: stretch;
  padding: clamp(34px, 6vw, 70px) 0 clamp(22px, 4vw, 44px);
}

.briefing-copy {
  min-width: 0;
  padding: clamp(22px, 4vw, 40px);
  border-left: 8px solid var(--yellow);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.briefing-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 260px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--blue-dark);
  color: #ffffff;
  box-shadow: var(--shadow);
}

.briefing-card span {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.briefing-card strong {
  display: block;
  margin-block: 22px 12px;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.briefing-card p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.76);
}

.eyebrow {
  width: fit-content;
  margin: 0 0 14px;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(36, 87, 166, 0.09);
  color: var(--blue-dark);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1,
h2 {
  line-height: 0.98;
  letter-spacing: -0.07em;
}

h1 {
  max-width: 760px;
  margin-bottom: 18px;
  font-size: clamp(2.65rem, 5.8vw, 5.3rem);
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(1.9rem, 4vw, 3.55rem);
}

h3 {
  margin-bottom: 9px;
  font-size: clamp(1.15rem, 1.9vw, 1.45rem);
}

.hero-text,
.course-board p,
.checklist p {
  color: var(--muted);
  font-size: clamp(0.98rem, 1.45vw, 1.08rem);
}

.hero-text {
  max-width: 680px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 19px;
  border: 1px solid rgba(36, 87, 166, 0.22);
  border-radius: 999px;
  font-weight: 900;
  text-align: center;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(36, 87, 166, 0.14);
}

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

.button-ghost {
  color: var(--blue-dark);
  background: var(--surface-soft);
}

.status-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-block: clamp(18px, 4vw, 42px);
}

.status-strip article {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 76px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 12px 30px rgba(31, 43, 52, 0.06);
}

.status-strip span {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--yellow);
  font-weight: 900;
}

.status-strip strong {
  line-height: 1.15;
}

.course-board {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(18px, 4vw, 42px);
  margin-block: clamp(28px, 5vw, 64px);
  align-items: start;
}

.course-intro {
  position: sticky;
  top: 92px;
  padding: clamp(20px, 3.6vw, 34px);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.course-steps {
  display: grid;
  gap: 12px;
}

.course-steps article {
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.78);
}

.course-steps span {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.checklist {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(18px, 4vw, 42px);
  margin-block: clamp(28px, 5vw, 64px) clamp(36px, 7vw, 86px);
  align-items: start;
}

.checklist-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.checklist-grid article {
  min-height: 168px;
  padding: clamp(18px, 3vw, 24px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface-soft);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 500ms ease, transform 500ms ease;
}

[data-reveal].is-visible,
html:not(.js-ready) [data-reveal] {
  opacity: 1;
  transform: none;
}

:focus-visible {
  outline: 3px solid rgba(36, 87, 166, 0.45);
  outline-offset: 4px;
}

@media (max-width: 980px) {
  .briefing,
  .course-board,
  .checklist {
    grid-template-columns: 1fr;
  }

  .course-intro {
    position: static;
  }

  .checklist-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .site-header {
    position: relative;
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 76px;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    width: 100%;
  }

  .status-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header,
  .briefing,
  .status-strip,
  .course-board,
  .checklist {
    width: min(100% - 28px, 1120px);
  }

  .briefing-copy {
    border-left-width: 5px;
  }

  h1 {
    font-size: clamp(2.35rem, 11.5vw, 3.9rem);
  }

  h2 {
    font-size: clamp(1.72rem, 9vw, 2.85rem);
  }

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

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

  .checklist-grid article {
    min-height: auto;
  }
}

@media (max-width: 390px) {
  .site-header,
  .briefing,
  .status-strip,
  .course-board,
  .checklist {
    width: min(100% - 24px, 1120px);
  }

  .logo span:last-child {
    max-width: 160px;
  }

  .header-actions {
    gap: 6px;
  }

  .language-switch {
    padding: 3px;
  }

  .language-switch button {
    min-width: 34px;
    min-height: 32px;
    font-size: 0.76rem;
  }

  .eyebrow {
    font-size: 0.68rem;
  }
}

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