/* base.css — spolecny zaklad pro technologie.html a clanky/*.html
   Shodnych 88 radku puvodne duplikovanych v 5 strankach. */
* { box-sizing: border-box; }
body {
    background-color: #020617;
    color: #e2e8f0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}
html { scroll-behavior: smooth; }

nav {
    position: fixed; top: 0; left: 0; width: 100%; height: 70px;
    background-color: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #1e293b;
    z-index: 100;
}
.nav-container {
    max-width: 1400px; height: 100%; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 60px;
}
.logo {
    display: flex; align-items: center; gap: 12px;
    font-size: 1.25rem; font-weight: 800; letter-spacing: 0.05em;
    color: inherit; text-decoration: none; transition: opacity 0.2s ease;
}
.logo:hover { opacity: 0.82; }
.logo img { height: 52px; width: auto; filter: drop-shadow(0 4px 10px rgba(59, 130, 246, 0.35)); }
.logo span { color: #3b82f6; }
.nav-links { display: flex; align-items: center; height: 100%; gap: 32px; }
.nav-links a { color: #cbd5e1; text-decoration: none; font-size: 0.95rem; font-weight: 500; transition: color 0.2s ease; }
.nav-links a:hover { color: #3b82f6; }
.nav-links a.aktivni { color: #3b82f6; }

.nav-item { position: relative; display: flex; align-items: center; height: 100%; }
.nav-item > a::after { content: "▾"; font-size: 0.7rem; margin-left: 6px; opacity: 0.65; }
.nav-dropdown {
    position: absolute; top: 100%; left: -18px; min-width: 170px;
    margin-top: 8px; padding: 8px 0;
    background-color: rgba(2, 6, 23, 0.8); backdrop-filter: blur(12px);
    border: 1px solid #1e293b; border-radius: 12px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.55);
    opacity: 0; visibility: hidden; transform: translateY(-6px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}
.nav-dropdown::before { content: ""; position: absolute; top: -10px; left: 0; right: 0; height: 20px; }
.nav-item:hover .nav-dropdown,
.nav-item > a:focus ~ .nav-dropdown,
.nav-item:focus-within .nav-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown a { display: block; padding: 9px 18px; font-size: 0.9rem; white-space: nowrap; }
.nav-dropdown a:hover { background-color: rgba(59, 130, 246, 0.12); }

.stranka-hlavicka {
    max-width: 1200px; margin: 0 auto; padding: 140px 40px 20px 40px;
}
.drobecky { font-size: 0.9rem; color: #64748b; margin-bottom: 18px; }
.drobecky a { color: #94a3b8; text-decoration: none; }
.drobecky a:hover { color: #3b82f6; }
.odznak {
    display: inline-block; padding: 6px 16px; border-radius: 100px;
    background-color: rgba(59, 130, 246, 0.1); border: 1px solid rgba(59, 130, 246, 0.3);
    color: #60a5fa; font-size: 0.85rem; font-weight: 600; letter-spacing: 0.05em;
}
.stranka-hlavicka h1 { font-size: 2.6rem; font-weight: 800; color: #fff; margin: 18px 0 14px 0; line-height: 1.2; }
.stranka-hlavicka .perex { font-size: 1.1rem; color: #94a3b8; line-height: 1.75; max-width: 780px; margin: 0; }

.site-footer {
    max-width: 1200px; margin: 80px auto 0 auto; padding: 26px 40px;
    border-top: 1px solid #1e293b;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 12px; color: #64748b; font-size: 0.88rem;
}
.site-footer a { color: #94a3b8; text-decoration: none; }
.site-footer a:hover { color: #3b82f6; }

@media (max-width: 768px) {
    .nav-container { padding: 0 20px; }
    .nav-dropdown { display: none; }
    .nav-item > a::after { content: none; }
    .nav-links { gap: 16px; font-size: 0.85rem; }
    .stranka-hlavicka { padding: 110px 20px 10px 20px; }
    .stranka-hlavicka h1 { font-size: 1.8rem; }
    .site-footer { flex-direction: column; text-align: center; padding: 20px; }
}