.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.82);
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    backdrop-filter: blur(14px);
    transition:
        background var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        backdrop-filter var(--transition);
}

.site-header.is-scrolled,
.site-header.menu-open {
    background: rgba(15, 23, 42, 0.92);
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
}

/* ===================== */
/* HEADER LAYOUT         */
/* ===================== */

.header-inner {
    min-height: var(--header-height);
    display: flex;
    align-items: center;
    gap: 20px;
}

.brand {
    position: relative;
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    z-index: 2;
}

.brand-logo {
    height: 34px;
    width: auto;
    display: block;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.brand-logo-dark {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.site-header.is-scrolled .brand-logo-light,
.site-header.menu-open .brand-logo-light {
    opacity: 0;
    visibility: hidden;
}

.site-header.is-scrolled .brand-logo-dark,
.site-header.menu-open .brand-logo-dark {
    opacity: 1;
    visibility: visible;
}

/* ===================== */
/* TRUST BADGE           */
/* ===================== */

.header-trust {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(34, 197, 94, 0.10);
    border: 1px solid rgba(34, 197, 94, 0.22);
    color: #15803d;
    font-size: 13px;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
    flex-shrink: 0;
    transition:
        background var(--transition),
        border-color var(--transition),
        color var(--transition),
        opacity var(--transition);
}

.header-trust-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    color: #16a34a;
    flex-shrink: 0;
    transition: color var(--transition);
}

.header-trust-icon svg {
    width: 16px;
    height: 16px;
    display: block;
}

.header-trust-text {
    display: inline-block;
}

/* Dunkler Header: Badge sichtbar und ruhig */
.site-header.is-scrolled .header-trust,
.site-header.menu-open .header-trust {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.14);
    color: rgba(255, 255, 255, 0.96);
}

.site-header.is-scrolled .header-trust-icon,
.site-header.menu-open .header-trust-icon {
    color: #4ade80;
}

/* ===================== */
/* CTA                   */
/* ===================== */

.header-cta {
    margin-left: 8px;
    flex-shrink: 0;
}

/* ===================== */
/* TOGGLE                */
/* ===================== */

.nav-toggle {
    display: none;
    width: 48px;
    height: 48px;
    padding: 0;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.70);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    flex-shrink: 0;
    transition:
        background var(--transition),
        border-color var(--transition),
        transform var(--transition);
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: #0f172a;
    transition: background var(--transition);
}

.site-header.is-scrolled .nav-toggle,
.site-header.menu-open .nav-toggle {
    border-color: rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.06);
}

.site-header.is-scrolled .nav-toggle span,
.site-header.menu-open .nav-toggle span {
    background: #ffffff;
}

/* ===================== */
/* DESKTOP NAV           */
/* ===================== */

.main-nav-desktop,
.main-nav-mobile {
    margin-left: auto;
}

.main-nav-desktop {
    display: flex;
    align-items: center;
    gap: 18px;
}

.main-nav-desktop a {
    position: relative;
    display: inline-flex;
    align-items: center;
    color: rgba(15, 23, 42, 0.76);
    font-weight: 600;
    font-size: 16px;
    line-height: 1;
    transition: color var(--transition), opacity var(--transition);
}

.site-header.is-scrolled .main-nav-desktop a,
.site-header.menu-open .main-nav-desktop a {
    color: rgba(255, 255, 255, 0.88);
}

.main-nav-desktop a:hover {
    color: #0f172a;
}

.site-header.is-scrolled .main-nav-desktop a:hover,
.site-header.menu-open .main-nav-desktop a:hover {
    color: #ffffff;
}

.main-nav-desktop a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 100%;
    height: 2px;
    border-radius: 999px;
    background: var(--orange);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.main-nav-desktop a:hover::after {
    transform: scaleX(1);
}

/* ===================== */
/* MOBILE NAV            */
/* ===================== */

.main-nav-mobile {
    display: none;
}

.main-nav-mobile a {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 16px;
    line-height: 1;
    transition:
        color var(--transition),
        opacity var(--transition),
        border-color var(--transition),
        background var(--transition);
}

.mobile-cta {
    display: none;
}

/* ===================== */
/* MOBILE                */
/* ===================== */

@media (max-width: 860px) {
    .main-nav-desktop,
    .header-cta {
        display: none;
    }

    .header-inner {
        min-height: var(--header-height);
        display: flex;
        align-items: center;
        gap: 10px;
        flex-wrap: nowrap;
    }

    .site-header {
        background: rgba(255, 255, 255, 0.88);
        border-bottom: 1px solid rgba(15, 23, 42, 0.06);
        backdrop-filter: blur(10px);
    }

    .nav-toggle {
        display: inline-flex;
        margin-left: 0;
    }

    .site-header .nav-toggle {
        border-color: rgba(15, 23, 42, 0.12);
        background: rgba(255, 255, 255, 0.85);
    }

    .site-header .nav-toggle span {
        background: #0f172a;
    }

    .site-header.is-scrolled,
    .site-header.menu-open {
        background: rgba(15, 23, 42, 0.92);
        border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    }

    .site-header.is-scrolled .nav-toggle,
    .site-header.menu-open .nav-toggle {
        border-color: rgba(255, 255, 255, 0.12);
        background: rgba(255, 255, 255, 0.06);
    }

    .site-header.is-scrolled .nav-toggle span,
    .site-header.menu-open .nav-toggle span {
        background: #ffffff;
    }

    /* Trust zwischen Logo und Burger */
    .header-trust {
        margin-left: auto;
        margin-right: 2px;
        padding: 6px 10px;
        gap: 6px;
        font-size: 11px;
    }

    .header-trust-icon {
        width: 14px;
        height: 14px;
    }

    .header-trust-icon svg {
        width: 14px;
        height: 14px;
    }

    .main-nav-mobile {
        display: none;
        margin: 0;
        width: 100%;
    }

    .site-header.menu-open .main-nav-mobile {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        padding: 14px 0 10px;
    }

    .site-header.menu-open .main-nav-mobile a {
        width: 100%;
        padding: 16px 16px;
        color: rgba(255, 255, 255, 0.92);
        background: transparent;
        border: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: 0;
        justify-content: flex-start;
        text-align: left;
        font-size: 16px;
        font-weight: 600;
    }

    .site-header.menu-open .main-nav-mobile a:first-child {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .site-header.menu-open .main-nav-mobile a:hover {
        background: transparent;
        color: #ffffff;
        border-bottom-color: rgba(255, 255, 255, 0.16);
    }

    .site-header.menu-open .main-nav-mobile .mobile-cta {
        display: inline-flex;
        width: 100%;
        min-height: 56px;
        margin: 18px 0 0;
        padding: 0 20px;
        justify-content: center;
        text-align: center;
        border: none;
        border-radius: 16px;
        background: #f97316;
        color: #ffffff;
        box-shadow: 0 12px 28px rgba(249, 115, 22, 0.35);
    }

    .site-header.menu-open .main-nav-mobile .mobile-cta:hover {
        background: #ea580c;
        color: #ffffff;
    }
}

@media (max-width: 640px) {
    .brand-logo {
        height: 30px;
    }

    .header-inner {
        gap: 8px;
    }

    .header-trust {
        padding: 5px 8px;
        gap: 5px;
        font-size: 10px;
    }

    .header-trust-icon {
        width: 13px;
        height: 13px;
    }

    .header-trust-icon svg {
        width: 13px;
        height: 13px;
    }

    .nav-toggle {
        width: 44px;
        height: 44px;
        border-radius: 12px;
    }
}

@media (max-width: 380px) {
    .header-trust {
        padding: 5px 7px;
        font-size: 9px;
        gap: 4px;
    }

    .header-trust-text {
        letter-spacing: -0.01em;
    }
}