:root {
  --night: #0D1B2A; --emerald: #1A3A20; --gold: #C8972A; --gold-lt: #e6b94d;
  --white: #FFFFFF; --off-white: #F8F6F0; --text: #1a1a2e; --text-muted: #666;
  --border: #e5e0d5;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { font-family: 'Inter', sans-serif; color: var(--text); background: var(--off-white); }
a { color: inherit; }
img { max-width: 100%; display: block; }

nav { display: flex; align-items: center; justify-content: space-between; padding: 1rem 3rem; background: var(--night); position: sticky; top: 0; z-index: 50; }
.nav-brand { display: flex; align-items: center; gap: 0.6rem; }
.nav-logo img { width: 38px; height: 38px; border-radius: 50%; }
.nav-title { color: var(--white); font-size: 1.05rem; font-weight: 700; }
.nav-title span { color: var(--gold); }
.nav-links { display: flex; align-items: center; gap: 1.5rem; list-style: none; }
.nav-links a { color: #ccc; font-size: 0.9rem; font-weight: 500; }
.nav-links a:hover { color: var(--gold-lt); }
.nav-links a.cta { background: var(--gold); color: var(--night); font-weight: 700; padding: 0.55rem 1.2rem; border-radius: 8px; }
.nav-links a.cta:hover { background: var(--gold-lt); }

.breadcrumb { max-width: 820px; margin: 1.75rem auto 0; padding: 0 1.5rem; font-size: 0.82rem; color: var(--text-muted); }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--gold); }

.course-hero { max-width: 820px; margin: 0 auto; padding: 1.25rem 1.5rem 2rem; }
.course-hero h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); color: var(--night); line-height: 1.2; margin-bottom: 0.75rem; }
.course-hero .tagline { font-size: 1.1rem; color: var(--text-muted); line-height: 1.6; }

.course-body { max-width: 820px; margin: 0 auto; padding: 0 1.5rem 3rem; }
.course-body > p { font-size: 1rem; line-height: 1.8; color: var(--text); margin-bottom: 2rem; }
.course-section { background: var(--white); border: 1px solid var(--border); border-radius: 14px; padding: 1.75rem 2rem; margin-bottom: 1.5rem; }
.course-section h2 { font-size: 1.15rem; color: var(--night); margin-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem; }
.course-section h2::before { content: ''; width: 5px; height: 20px; background: var(--gold); border-radius: 3px; display: inline-block; }
.course-section ul { list-style: none; display: grid; gap: 0.65rem; }
.course-section ul li { font-size: 0.95rem; line-height: 1.6; color: var(--text); padding-left: 1.6rem; position: relative; }
.course-section ul li::before { content: '✓'; position: absolute; left: 0; color: var(--gold); font-weight: 700; }
.course-section p { font-size: 0.95rem; line-height: 1.7; color: var(--text); }

.cta-block { background: linear-gradient(135deg, var(--emerald), var(--night)); border-radius: 16px; padding: 2.25rem 2rem; text-align: center; color: var(--white); }
.cta-block h2 { font-size: 1.4rem; margin-bottom: 0.6rem; }
.cta-block p { color: #c9d6c9; margin-bottom: 1.5rem; font-size: 0.95rem; }
.cta-block .btns { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn-primary { display: inline-flex; align-items: center; gap: 0.5rem; background: var(--gold); color: var(--night); font-weight: 700; padding: 0.85rem 1.75rem; border-radius: 10px; font-size: 0.95rem; }
.btn-primary:hover { background: var(--gold-lt); }
.btn-outline { display: inline-flex; align-items: center; gap: 0.5rem; border: 2px solid var(--gold); color: var(--gold-lt); padding: 0.85rem 1.75rem; border-radius: 10px; font-size: 0.95rem; }
.btn-outline:hover { background: rgba(200,151,42,0.12); }

.other-courses { max-width: 820px; margin: 0 auto; padding: 0 1.5rem 3rem; }
.other-courses h3 { font-size: 1rem; color: var(--night); margin-bottom: 1rem; }
.other-courses .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px,1fr)); gap: 0.75rem; }
.other-courses .grid a { background: var(--white); border: 1px solid var(--border); border-radius: 10px; padding: 0.85rem 1rem; font-size: 0.85rem; font-weight: 600; color: var(--night); }
.other-courses .grid a:hover { border-color: var(--gold); color: var(--gold); }

footer { text-align: center; padding: 2.5rem 1.5rem; background: var(--night); color: #aaa; font-size: 0.85rem; }
footer .fl { display: flex; justify-content: center; gap: 1.25rem; margin: 0.75rem 0; flex-wrap: wrap; }
footer a { color: #ccc; }
footer a:hover { color: var(--gold-lt); }

.nav-toggle { display: none; background: none; border: none; color: var(--white); font-size: 1.4rem; cursor: pointer; }
@media (max-width: 800px) {
  nav { padding: 1rem 1.25rem; }
  .nav-links { position: absolute; top: 100%; left: 0; right: 0; background: var(--night); flex-direction: column; align-items: flex-start; padding: 1rem 1.5rem; gap: 1rem; display: none; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .course-section { padding: 1.25rem 1.25rem; }
}