.landing-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 40px; background: var(--maroon);
    transition: background-color 0.3s;
}
.landing-logo {
    height: 28px;
    aspect-ratio: 1060 / 284;
    display: flex;
    align-items: center;
}
.landing-logo img { width: 100%; height: 100%; object-fit: contain; transition: filter 0.3s; }
.landing-logo a { display: block; height: 100%; }
.landing-nav { display: flex; gap: 30px; align-items: center; }
.landing-nav a {
    font-family: 'Nanum Myeongjo', serif; font-size: 10px; font-weight: 500;
    letter-spacing: 2.52px; color: var(--offwhite); text-decoration: none;
    text-transform: uppercase; transition: opacity 0.3s;
}
.landing-nav a:hover { opacity: 0.85; }
.landing-nav a.nav-active { text-decoration: underline; text-underline-offset: 4px; }

/* ── Premium Login Button ── */
.landing-nav a.nav-link-highlight {
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 22px;
    font-family: 'Nanum Myeongjo', serif;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 2.8px;
    text-transform: uppercase;
    color: var(--maroon, #561023) !important;
    background: var(--cream, #ede6dc);
    border: none;
    box-shadow:
        0 0 0 1.5px rgba(237, 230, 220, 0.5),
        0 4px 16px rgba(237, 230, 220, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.45);
    text-decoration: none !important;
    transition:
        box-shadow 0.3s ease,
        transform 0.2s ease,
        background 0.3s ease;
    animation: login-glow-pulse 4s ease-in-out infinite;
}

/* Shimmer sweep */
.landing-nav a.nav-link-highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: -80%;
    width: 55%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent 0%,
        rgba(255, 255, 255, 0.55) 50%,
        transparent 100%
    );
    transform: skewX(-18deg);
    animation: login-shimmer-sweep 4s ease-in-out infinite;
    pointer-events: none;
}

.landing-nav a.nav-link-highlight > span {
    position: relative;
    z-index: 1;
}

/* Hover */
.landing-nav a.nav-link-highlight:hover {
    background: #f5ede1;
    transform: translateY(-2px) scale(1.04);
    box-shadow:
        0 0 0 2px rgba(237, 230, 220, 0.75),
        0 10px 28px rgba(237, 230, 220, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.55);
    opacity: 1;
}

@keyframes login-shimmer-sweep {
    0%   { left: -80%; }
    55%  { left: 130%; }
    100% { left: 130%; }
}

@keyframes login-glow-pulse {
    0%, 100% {
        box-shadow:
            0 0 0 1.5px rgba(237, 230, 220, 0.5),
            0 4px 16px rgba(237, 230, 220, 0.25),
            inset 0 1px 0 rgba(255, 255, 255, 0.45);
    }
    50% {
        box-shadow:
            0 0 0 2px rgba(237, 230, 220, 0.75),
            0 6px 22px rgba(237, 230, 220, 0.4),
            inset 0 1px 0 rgba(255, 255, 255, 0.55);
    }
}
.hamburger {
    display: none; flex-direction: column; cursor: pointer; padding: 0.5rem;
    border: 0; background: transparent;
}
.hamburger-line { width: 25px; height: 2px; background: var(--offwhite); margin: 3px 0; transition: 0.3s; }

@media (max-width: 1024px) {
    .hamburger { display: flex; }
    .landing-nav {
        position: absolute; top: 100%; left: 0; width: 100%;
        background: var(--maroon); flex-direction: column; padding: 1rem 0;
        transform: translateY(-100%); opacity: 0; visibility: hidden;
        transition: all 0.3s;
    }
    .landing-header--green .landing-nav { background: var(--green); }
    .landing-header--blue .landing-nav { background: var(--blue); }
    .landing-header--forest .landing-nav { background: var(--forest); }
    .landing-header--magenta .landing-nav { background: var(--magenta); }
    .landing-header--coral .landing-nav { background: var(--coral); }
    .landing-header--yellow .landing-nav { background: var(--yellow); }
    .landing-header--cream .landing-nav { background: var(--cream); }
    .landing-nav.active { transform: translateY(0); opacity: 1; visibility: visible; }
    .hamburger.active .hamburger-line:nth-child(1) { transform: rotate(-45deg) translate(-5px, 6px); }
    .hamburger.active .hamburger-line:nth-child(2) { opacity: 0; }
    .hamburger.active .hamburger-line:nth-child(3) { transform: rotate(45deg) translate(-5px, -6px); }
}
@media (max-width: 768px) {
    .landing-header { padding: 16px 20px; }
}