/* Art direction: institutional information page → calm, academic, trustworthy.
   Palette: cool neutral with teal accent.
   Typography: Inter for display + body for clarity and easy bilingual reading.
   Density: balanced. */
:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #edf3f8;
  --border: #d6e1ea;
  --text: #173042;
  --muted: #557082;
  --primary: #005c7a;
  --primary-dark: #00465d;
  --accent: #00a5cf;
  --shadow: 0 20px 50px rgba(18, 56, 80, 0.08);
  --radius: 18px;
  --radius-sm: 12px;
  --container: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f7fbff 0%, #f3f7fb 100%);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; }

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  background: var(--primary);
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  z-index: 1000;
}
.skip-link:focus { top: 12px; }

.container {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244, 247, 251, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(23, 48, 66, 0.08);
}

.topbar-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 800;
  box-shadow: var(--shadow);
}

.brand-copy {
  display: grid;
  gap: 2px;
}
.brand-copy strong { font-size: 1rem; }
.brand-copy span { color: var(--muted); font-size: 0.92rem; }

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  padding: 4px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid rgba(23, 48, 66, 0.1);
  box-shadow: 0 8px 24px rgba(18, 56, 80, 0.06);
}

.lang-btn {
  min-width: 52px;
  min-height: 40px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 700;
}

.lang-btn.is-active {
  background: var(--primary);
  color: #fff;
}

.hero {
  padding: 72px 0 40px;
}

.hero-grid,
.section-grid {
  display: grid;
  gap: 32px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.4fr) minmax(300px, 0.9fr);
  align-items: center;
}

.eyebrow,
.section-label {
  margin: 0 0 10px;
  font-size: 0.84rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 800;
  color: var(--primary);
}

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

h1 {
  font-size: clamp(2.5rem, 4vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}

h2 {
  font-size: clamp(1.8rem, 2.4vw, 2.6rem);
  line-height: 1.15;
  margin-bottom: 14px;
}

h3 {
  font-size: 1.18rem;
  margin-bottom: 10px;
}

.lead,
.content-stack p,
.card p,
.key-list li,
.notice span,
.footer-inner p {
  color: var(--muted);
  font-size: 1.04rem;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
}
.button:hover,
.button:focus-visible,
.lang-btn:hover,
.lang-btn:focus-visible { transform: translateY(-1px); }

.button-primary {
  background: var(--primary);
  color: #fff;
}
.button-primary:hover,
.button-primary:focus-visible { background: var(--primary-dark); }

.button-secondary {
  border: 1px solid rgba(23, 48, 66, 0.12);
  background: var(--surface);
}
.button-secondary:hover,
.button-secondary:focus-visible { border-color: rgba(0, 92, 122, 0.3); color: var(--primary); }

.hero-card,
.card,
.notice {
  background: var(--surface);
  border: 1px solid rgba(23, 48, 66, 0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 28px;
}

.key-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 12px;
}

.section {
  padding: 40px 0;
}

.section.alt {
  background: rgba(255, 255, 255, 0.48);
  border-top: 1px solid rgba(23, 48, 66, 0.05);
  border-bottom: 1px solid rgba(23, 48, 66, 0.05);
}

.section-grid {
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
  align-items: start;
}

.content-stack,
.cards-stack {
  display: grid;
  gap: 18px;
}

.section-header {
  margin-bottom: 24px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card {
  padding: 24px;
}

.step-number {
  display: inline-flex;
  min-width: 48px;
  min-height: 48px;
  border-radius: 14px;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  background: var(--surface-soft);
  color: var(--primary);
  font-weight: 800;
}

.notice {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 18px 20px;
  background: #f7fbfe;
}

.footer {
  padding: 18px 0 28px;
}

.footer-inner {
  min-height: auto;
  padding-top: 8px;
  border-top: 1px solid rgba(23, 48, 66, 0.08);
}

.footer-inner a {
  color: var(--primary);
  font-weight: 700;
}

@media (max-width: 960px) {
  .hero-grid,
  .section-grid,
  .steps-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 48px;
  }
}

@media (max-width: 640px) {
  .topbar-inner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 0;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-card,
  .card,
  .notice {
    padding: 20px;
  }
}