.premium-header {
    position: fixed;
    z-index: 1100;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.76);
    border-bottom: 1px solid rgba(226, 232, 240, 0.65);
    backdrop-filter: blur(18px);
    transition:
        background-color 0.25s ease,
        border-color 0.25s ease,
        box-shadow 0.25s ease;
}

.premium-header.is-scrolled {
    background: rgba(255, 255, 255, 0.96);
    border-bottom-color: rgba(203, 213, 225, 0.9);
    box-shadow: 0 14px 40px rgba(15, 23, 42, 0.08);
}

.premium-header-container {
    height: 100%;
    display: flex;
    align-items: center;
    gap: 34px;
}

.premium-brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    flex-shrink: 0;
}

.premium-brand-symbol {
    position: relative;
    width: 43px;
    height: 43px;
    display: grid;
    place-items: center;
    overflow: hidden;
    color: var(--white);
    font-size: 22px;
    font-weight: 900;
    background:
        linear-gradient(
            135deg,
            var(--primary),
            var(--primary-dark)
        );
    border-radius: 13px;
    box-shadow: 0 12px 26px rgba(37, 99, 235, 0.24);
}

.premium-brand-symbol::after {
    position: absolute;
    top: -18px;
    right: -14px;
    width: 35px;
    height: 35px;
    content: "";
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
}

.premium-brand-copy {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.premium-brand-copy strong {
    color: var(--secondary);
    font-size: 22px;
    line-height: 1;
    letter-spacing: -0.8px;
}

.premium-brand-copy strong span {
    color: var(--primary);
}

.premium-brand-copy small {
    color: var(--muted);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.premium-navigation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    margin-left: auto;
}

.premium-navigation-link {
    position: relative;
    padding: 10px 13px;
    color: #526176;
    font-size: 14px;
    font-weight: 700;
    border-radius: 9px;
    transition:
        color 0.2s ease,
        background-color 0.2s ease;
}

.premium-navigation-link:hover {
    color: var(--primary);
    background: #eff6ff;
}

.premium-navigation-link.is-active {
    color: var(--primary-dark);
    background: #dbeafe;
}

.premium-navigation-link.is-active::after {
    position: absolute;
    right: 13px;
    bottom: 4px;
    left: 13px;
    height: 2px;
    content: "";
    background: var(--primary);
    border-radius: 999px;
}

.premium-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.premium-login-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 11px;
    color: #334155;
    font-size: 13px;
    font-weight: 800;
    border-radius: 10px;
    transition:
        color 0.2s ease,
        background-color 0.2s ease;
}

.premium-login-link:hover {
    color: var(--primary);
    background: #eff6ff;
}

.premium-login-icon {
    width: 30px;
    height: 30px;
    display: grid;
    place-items: center;
    color: var(--primary);
    background: var(--primary-light);
    border-radius: 9px;
}

.premium-login-icon svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.premium-header-cta {
    min-height: 45px;
    gap: 8px;
    padding: 10px 17px;
    font-size: 13px;
    border-radius: 11px;
}

.premium-header-cta svg {
    width: 17px;
    height: 17px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform 0.2s ease;
}

.premium-header-cta:hover svg {
    transform: translateX(3px);
}

.premium-menu-toggle {
    width: 45px;
    height: 45px;
    display: none;
    margin-left: auto;
    padding: 10px;
    background: transparent;
    border-radius: 10px;
    cursor: pointer;
}

.premium-menu-toggle:hover {
    background: #eff6ff;
}

.premium-menu-toggle span {
    width: 24px;
    height: 2px;
    display: block;
    margin: 5px auto;
    background: var(--secondary);
    border-radius: 999px;
    transition:
        transform 0.22s ease,
        opacity 0.22s ease;
}

.premium-menu-toggle.is-open span:first-child {
    transform: translateY(7px) rotate(45deg);
}

.premium-menu-toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.premium-menu-toggle.is-open span:last-child {
    transform: translateY(-7px) rotate(-45deg);
}

.premium-mobile-actions {
    display: none;
}