/* -------------------------------------------------
   HEADER / NAVBAR
------------------------------------------------- */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 500;
}

.topbar {
    padding: 0.6rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 1rem;
    color: #fff;
}

.topbar-email,
.topbar-phone {
    display: inline-flex;
    align-items: center;
    line-height: 1;
    transition: var(--transition);
}

.topbar-email:hover,
.topbar-phone:hover {
    color: var(--color-accent);
}

.navbar {
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: background 0.3s ease, backdrop-filter 0.3s ease, border-color 0.3s ease;
    padding: 2.5rem 0 1.25rem;
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.navbar-logo {
    display: block;
}

.navbar-logo img {
    height: 40px;
    width: auto;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 3rem;
    margin-left: auto;
}

.navbar-menu a {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.navbar-menu a:hover {
    color: var(--color-accent);
}

.navbar-cta {
    margin-left: 1rem;
    padding: 0.7rem 1.3rem;
    font-size: 0.88rem;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    margin-right: 10px;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}

/* Scrolled state - navbar dostane tmavé pozadí při scrollu */
.site-header.is-scrolled .topbar {
    margin-top: -60px;
}

.site-header.is-scrolled .navbar {
    background: rgba(31, 31, 31, 0.4);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Mobilní slide-menu */
.mobile-menu-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 590;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.mobile-menu-backdrop.is-open {
    opacity: 1;
    visibility: visible;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(320px, 85vw);
    height: 100vh;
    background: var(--color-dark);
    z-index: 600;
    transition: right 0.4s ease;
    padding: 6rem 2rem 2rem;
}

.mobile-menu.is-open {
    right: 0;
}

.mobile-menu-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    font-size: 1.4rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.mobile-menu-close:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.mobile-menu-inner {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.mobile-menu-inner a {
    color: #fff;
    font-size: 1.1rem;
}

.mobile-menu-inner .btn {
    justify-content: center;
    margin-top: 1rem;
}

.mobile-menu-kontakty {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.mobile-menu-kontakty a {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
}

.mobile-menu-kontakty a:hover {
    color: var(--color-accent);
}

@media (max-width: 900px) {
    .navbar-menu,
    .navbar-cta {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .topbar {
        display: none;
    }

    .navbar {
        padding: 1rem 0;
    }
}