:root {
  --primary: #1b3a63;
  --primary-dark: #12283f;
  --accent: #d9a441;
  --accent-dark: #b9852c;
  --german-color: #c8102e;
  --french-color: #274b9f;
  --text-dark: #1f2733;
  --text-muted: #5c6773;
  --bg-light: #f6f8fb;
  --border-light: #e6e9ef;
}

body {
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-dark);
  background-color: #fff;
}

a {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
}
.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn-accent {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #1f2733;
  font-weight: 600;
}
.btn-accent:hover {
  background-color: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #1f2733;
}

.btn-outline-primary {
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline-primary:hover {
  background-color: var(--primary);
  border-color: var(--primary);
}

.text-primary-custom { color: var(--primary) !important; }
.bg-primary-custom { background-color: var(--primary) !important; }

/* Navbar */
.site-navbar {
  background-color: #fff;
  box-shadow: 0 2px 12px rgba(15, 33, 58, 0.08);
}
.site-navbar .navbar-brand {
  font-weight: 700;
  color: var(--primary);
  font-size: 1.35rem;
  padding-top: 0;
  padding-bottom: 0;
}
.site-navbar .navbar-brand span {
  color: var(--accent);
}
.brand-logo {
  height: 40px;
  width: auto;
}
.site-navbar .nav-link {
  color: var(--text-dark);
  font-weight: 500;
  padding-left: 0.85rem !important;
  padding-right: 0.85rem !important;
}
.site-navbar .nav-link:hover,
.site-navbar .nav-link.active {
  color: var(--primary);
}
.site-navbar .dropdown-menu {
  border: none;
  box-shadow: 0 10px 30px rgba(15, 33, 58, 0.15);
  border-radius: 0.5rem;
}

/* Hero */
.hero-section {
  background: linear-gradient(120deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}
.hero-section h1 {
  font-weight: 700;
  font-size: 2.75rem;
}
.hero-section .lead {
  color: rgba(255, 255, 255, 0.85);
}
.hero-flags {
  font-size: 3rem;
  letter-spacing: 0.5rem;
}

.badge-language-german {
  background-color: var(--german-color);
}
.badge-language-french {
  background-color: var(--french-color);
}

/* Section spacing */
.section-padding {
  padding: 4.5rem 0;
}
.section-title {
  font-weight: 700;
  color: var(--primary);
}
.section-subtitle {
  color: var(--text-muted);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
.bg-section-alt {
  background-color: var(--bg-light);
}

/* Course cards */
.course-card {
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  height: 100%;
}
.course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(15, 33, 58, 0.12);
}
.course-card .card-img-top {
  height: 190px;
  object-fit: cover;
  background-color: var(--bg-light);
}
.course-card .card-body {
  display: flex;
  flex-direction: column;
}
.course-card .course-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Testimonial cards */
.testimonial-card {
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  padding: 1.75rem;
  height: 100%;
  background-color: #fff;
}
.testimonial-card .stars {
  color: var(--accent);
}
.testimonial-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--bg-light);
}

/* Blog cards */
.blog-card {
  border: 1px solid var(--border-light);
  border-radius: 0.75rem;
  overflow: hidden;
  height: 100%;
}
.blog-card .card-img-top {
  height: 180px;
  object-fit: cover;
  background-color: var(--bg-light);
}

/* CTA */
.cta-section {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #1f2733;
  border-radius: 1rem;
}

/* Footer */
.site-footer {
  background-color: var(--primary-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 3rem 0 1.5rem;
}
.site-footer h5 {
  color: #fff;
  font-weight: 600;
}
.site-footer a {
  color: rgba(255, 255, 255, 0.75);
}
.site-footer a:hover {
  color: var(--accent);
}
.footer-logo {
  height: 34px;
  width: auto;
  background-color: #fff;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin-top: 2rem;
  padding-top: 1.25rem;
  font-size: 0.875rem;
}

/* Page header */
.page-header {
  background-color: var(--bg-light);
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border-light);
}

@media (max-width: 767.98px) {
  .hero-section { padding: 3rem 0; text-align: center; }
  .hero-section h1 { font-size: 2rem; }
  .section-padding { padding: 3rem 0; }
}