/* === MASTHEAD === */
.masthead-rule-top {
    border-top: 1px solid var(--border-heavy);
}

.masthead {
    padding: 1rem 0 0.8rem;
    text-align: center;
    position: relative;
}

.masthead-date {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    font-family: -apple-system, system-ui, "Helvetica Neue", sans-serif;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--fg-dim);
    margin-bottom: 0.4rem;
}
.masthead-date a {
    font-size: 0.85rem;
    color: var(--fg-muted);
    text-decoration: none;
    line-height: 1;
    transition: color 0.2s;
}
.masthead-date a:hover {
    color: var(--fg);
}
.masthead-date .arrow-disabled {
    font-size: 0.85rem;
    color: var(--fg-faint);
    opacity: 0.4;
}

.masthead .site-title {
    font-family: "Libre Baskerville", Georgia, serif;
    font-size: clamp(2rem, 5vw, 3.6rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    line-height: 1.05;
    margin-bottom: 0.2rem;
    text-shadow: var(--emboss);
}

.masthead .site-title a {
    color: inherit;
    text-decoration: none;
}

.masthead-subtitle {
    font-family: "Libre Baskerville", Georgia, serif;
    font-size: clamp(0.72rem, 1.4vw, 0.82rem);
    font-style: italic;
    color: var(--fg-dim);
    letter-spacing: 0.06em;
}

/* === NAVIGATION === */
.masthead-nav {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 0.5rem;
    font-family: -apple-system, system-ui, "Helvetica Neue", sans-serif;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.masthead-nav a {
    color: var(--fg-muted);
    text-decoration: none;
    padding: 0.2rem 0;
    transition: color 0.15s;
}
.masthead-nav a:hover {
    color: var(--fg);
}
.masthead-nav a.active {
    color: var(--fg);
    border-bottom: 2px solid var(--accent);
}

.masthead-rule-bottom {
    border-top: 4px double var(--border-heavy);
}

/* === LANGUAGE SWITCHER === */
.lang-switcher {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}
.lang-switcher form {
    display: flex;
}
.lang-switcher button {
    background: none;
    border: 1px solid var(--border);
    border-right: none;
    padding: 0.3rem 0.5rem;
    font-family: -apple-system, system-ui, "Helvetica Neue", sans-serif;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    cursor: pointer;
    color: var(--fg-muted);
    transition: color 0.2s, background 0.2s;
}
.lang-switcher button:first-of-type {
    border-radius: 3px 0 0 3px;
}
.lang-switcher button:last-of-type {
    border-right: 1px solid var(--border);
    border-radius: 0 3px 3px 0;
}
.lang-switcher button:hover {
    color: var(--fg);
}
.lang-switcher button.active {
    background: var(--fg);
    color: var(--bg);
    border-color: var(--fg);
}

/* === THEME TOGGLE === */
.theme-toggle {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    background: none;
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 2.5rem;
    height: 2.5rem;
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    color: var(--fg-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, border-color 0.2s;
}
.theme-toggle:hover {
    color: var(--fg);
    border-color: var(--fg-dim);
}

/* === FOOTER === */
footer {
    border-top: 2px solid var(--border-heavy);
    padding: 1rem 0;
    text-align: center;
    color: var(--fg-muted);
    font-family: -apple-system, system-ui, "Helvetica Neue", sans-serif;
    font-size: 0.75rem;
    letter-spacing: 0.03em;
}

/* === RESPONSIVE === */

/* Mobile: stack header controls */
@media (max-width: 599px) {
    .masthead {
        padding: 0.6rem 0;
    }
    .masthead-date {
        font-size: 0.6rem;
    }
    .lang-switcher {
        position: static;
        transform: none;
        display: flex;
        justify-content: center;
        margin-bottom: 0.5rem;
    }
    .theme-toggle {
        position: static;
        transform: none;
        width: 2rem;
        height: 2rem;
        font-size: 0.95rem;
        margin: 0.4rem auto 0;
    }
}

/* Tablet portrait */
@media (min-width: 600px) and (max-width: 768px) {
    .masthead {
        padding: 0.9rem 0 0.7rem;
    }
}