/* =========================
   Global Design System
========================= */
:root {
  --primary: #1f4e79;
  --primary-dark: #173b5c;
  --bg-light: #f4f8ff;
  --card-bg: #ffffff;
  --border: #e1e6ef;
  --text-main: #1f2933;
  --text-sub: #6b7280;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Inter", system-ui, -apple-system, sans-serif;
  background: var(--bg-light);
  color: var(--text-main);
  line-height: 1.7;
}

/* =========================
   Header / Hero
========================= */
header {
  background: var(--primary);
  color: white;
  padding: 55px 30px 50px;
  text-align: center;
  position: relative;
}

header h1 {
  margin: 0;
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

header p.subtitle {
  margin-top: 12px;
  font-size: 22px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
  opacity: 0.92;
}

.lang-switch {
  position: absolute;
  right: 28px;
  top: 26px;
  font-size: 20px;
}

.lang-switch a {
  color: white;
  text-decoration: none;
  opacity: 0.9;
}

.lang-switch a:hover {
  text-decoration: underline;
  opacity: 1;
}

.hero-actions {
  margin-top: 28px;
}

/* =========================
   Buttons
========================= */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  margin: 6px 8px;
  transition: all 0.18s ease;
}

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

.btn-primary:hover {
  background: #eef3f9;
  transform: translateY(-1px);
}

.btn-secondary {
  border: 1.8px solid white;
  color: white;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

.btn-disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
  filter: grayscale(100%);
}

/* =========================
   Layout
========================= */
.wrapper {
  max-width: 1150px;
  margin: 70px auto;
  padding: 0 30px;
}

.section {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 48px 50px;
  margin-bottom: 60px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.section h2 {
  margin-top: 0;
  font-size: 30px;
  color: var(--primary);
}

/* =========================
   Text helpers
========================= */
.lead {
  margin-top: 0;
  font-size: 22px;
  color: var(--text-main);
}

.muted {
  margin-top: 6px;
  font-size: 16px;
  color: var(--text-sub);
}

/* =========================
   Footer
========================= */
footer {
  background: #eef3f9;
  border-top: 1px solid var(--border);
  margin-top: 80px;
  padding: 36px 0 28px;
  text-align: center;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 30px;
}

.footer-org {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.footer-copy {
  margin-top: 12px;
  font-size: 16px;
  color: var(--text-sub);
}