/* ===== HEADER STYLES ===== */
.site-header {
    position: sticky; top: 0; z-index: 1000;
    background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.08);
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}
.header-container {
    max-width: 1200px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 20px;
}
.header-logo a {
    display: flex; align-items: center; gap: 8px;
    text-decoration: none; color: inherit; font-weight: 700; font-size: 1.1rem;
}
.logo-icon { font-size: 1.4rem; }
.header-nav .nav-list {
    display: flex; gap: 24px; list-style: none; margin: 0; padding: 0;
}
.header-nav .nav-list a {
    text-decoration: none; color: #374151; font-weight: 500;
    padding: 6px 0; border-bottom: 2px solid transparent;
    transition: border-color 0.2s;
}
.header-nav .nav-list a:hover { border-bottom-color: #5c6bc0; color: #5c6bc0; }
.header-auth { display: flex; gap: 10px; align-items: center; }
.btn {
    padding: 8px 16px; border-radius: 8px; font-weight: 500;
    text-decoration: none; cursor: pointer; border: none; font-size: 0.9rem;
    transition: all 0.2s;
}
.btn-primary { background: #5c6bc0; color: white; }
.btn-primary:hover { background: #3f51b5; }
.btn-outline { border: 1px solid #5c6bc0; color: #5c6bc0; background: transparent; }
.btn-outline:hover { background: #5c6bc0; color: white; }
.btn-text { background: none; border: none; color: #6b7280; padding: 8px; }
.btn-text:hover { color: #dc2626; }
.mobile-toggle {
    display: none; flex-direction: column; gap: 4px;
    background: none; border: none; padding: 4px; cursor: pointer;
}
.mobile-toggle span {
    display: block; width: 20px; height: 2px; background: #374151; border-radius: 2px;
}
/* Адаптив */
@media (max-width: 768px) {
    .header-nav {
        position: absolute; top: 100%; left: 0; right: 0;
        background: white; border-bottom: 1px solid rgba(0,0,0,0.08);
        padding: 16px 20px; display: none;
    }
    .header-nav.active { display: block; }
    .header-nav .nav-list { flex-direction: column; gap: 12px; }
    .mobile-toggle { display: flex; }
    .header-auth { display: none; }
}