.mc-nav {
    --mc-ink: #171a17;
    --mc-paper: #fffdf6;
    --mc-green: #315c45;
    --mc-gold: #e9b949;
    position: sticky;
    top: 0;
    z-index: 1500;
    width: 100%;
    border-bottom: 3px solid var(--mc-gold);
    background: var(--mc-ink);
    color: var(--mc-paper);
    font-family: 'Noto Sans TC', sans-serif;
}

.mc-nav *, .mc-nav *::before, .mc-nav *::after { box-sizing: border-box; }

.mc-nav__inner {
    width: min(1240px, 100%);
    min-height: 72px;
    margin: 0 auto;
    padding: 10px 24px;
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: 22px;
}

.mc-nav__brand {
    color: var(--mc-paper);
    text-decoration: none;
    line-height: 1;
}

.mc-nav a:focus-visible,
.mc-nav button:focus-visible,
.mc-nav summary:focus-visible {
    outline: 3px solid var(--mc-gold);
    outline-offset: 3px;
}

.mc-nav__brand strong {
    display: block;
    font-family: 'Playfair Display', 'Noto Sans TC', serif;
    font-size: 1.5rem;
    font-style: italic;
    letter-spacing: -0.03em;
}

.mc-nav__brand small {
    display: block;
    margin-top: 5px;
    color: #bfc5bc;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.mc-nav__links {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 4px;
}

.mc-nav__link {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 42px;
    padding: 8px 12px;
    color: #d7dbd3;
    font-size: 0.88rem;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
}

.mc-nav__link:hover, .mc-nav__link:focus-visible { color: #fff; }
.mc-nav__link.is-active { color: #fff; }
.mc-nav__link.is-active::after {
    content: "";
    position: absolute;
    right: 12px;
    bottom: 3px;
    left: 12px;
    height: 3px;
    background: var(--mc-gold);
}

.mc-nav__profile {
    display: grid;
    grid-template-columns: 34px auto;
    align-items: center;
    gap: 9px;
    min-width: 150px;
    padding: 7px 10px;
    border: 1px solid #697068;
    color: #fff;
    text-decoration: none;
}

.mc-nav__profile:hover, .mc-nav__profile.is-active {
    border-color: var(--mc-gold);
    background: rgba(233, 185, 73, 0.08);
}

.mc-nav__avatar {
    display: grid;
    width: 34px;
    height: 34px;
    place-items: center;
    background: var(--mc-green);
    color: #fff;
    font-family: 'Playfair Display', serif;
    font-size: 1.05rem;
    font-weight: 700;
}

.mc-nav__profile-copy { min-width: 0; }
.mc-nav__profile-copy strong {
    display: block;
    max-width: 130px;
    overflow: hidden;
    font-size: 0.86rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mc-nav__profile-copy small { color: #bfc5bc; font-size: 0.68rem; }

.mc-nav__logout { margin: 0; }
.mc-nav__logout button {
    padding: 8px 4px;
    border: 0;
    border-bottom: 1px solid #737973;
    background: transparent;
    color: #c8ccc5;
    cursor: pointer;
    font: inherit;
    font-size: 0.72rem;
    font-weight: 700;
}
.mc-nav__logout button:hover { border-color: #fff; color: #fff; }

.mc-nav__mobile { display: none; position: relative; }
.mc-nav__mobile summary {
    padding: 10px 12px;
    border: 1px solid #747a73;
    color: #fff;
    cursor: pointer;
    font-size: 0.84rem;
    font-weight: 700;
    list-style: none;
}
.mc-nav__mobile summary::-webkit-details-marker { display: none; }
.mc-nav__mobile summary::after { content: " +"; color: var(--mc-gold); }
.mc-nav__mobile[open] summary::after { content: " -"; }

.mc-nav__mobile-panel {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: min(310px, calc(100vw - 28px));
    padding: 10px;
    border: 2px solid var(--mc-ink);
    border-top: 4px solid var(--mc-gold);
    background: var(--mc-paper);
    box-shadow: 8px 8px 0 rgba(23, 26, 23, 0.25);
}

.mc-nav__mobile-panel a,
.mc-nav__mobile-panel button {
    display: block;
    width: 100%;
    padding: 12px;
    border: 0;
    border-bottom: 1px solid #d5d1c7;
    background: transparent;
    color: var(--mc-ink);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    text-align: left;
    text-decoration: none;
}
.mc-nav__mobile-panel a.is-active { border-left: 5px solid var(--mc-gold); }
.mc-nav__mobile-panel form { margin: 0; }

@media (prefers-reduced-motion: reduce) {
    .mc-nav * { scroll-behavior: auto !important; }
}

@media (max-width: 980px) {
    .mc-nav__inner { grid-template-columns: auto 1fr auto; }
    .mc-nav__links, .mc-nav__profile, .mc-nav__logout { display: none; }
    .mc-nav__mobile { display: block; grid-column: 3; }
}

@media (max-width: 520px) {
    .mc-nav__inner { min-height: 64px; padding: 8px 14px; }
    .mc-nav__brand strong { font-size: 1.3rem; }
    .mc-nav__brand small { display: none; }
}