/* ─── Header ─── */
.header {
    background: var(--bg-chrome);
    border-bottom: 1px solid var(--border-chrome);
    position: sticky; top: 0; z-index: 100;
    backdrop-filter: blur(12px);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 52px;
}
.header-brand {
    font-family: var(--font-display);
    font-size: 1.15rem; font-weight: 700;
    letter-spacing: -0.01em;
}
.header-brand a { display: flex; align-items: center; gap: 6px; }
.header-logo {
    width: 28px; height: 28px;
    filter: invert(1) brightness(2);
}
.header-brand a { color: var(--text-primary); }
.header-brand a:hover { text-decoration: none; color: white; }
.header nav { display: flex; gap: 4px; align-items: center; }
.header nav a {
    color: var(--text-secondary); font-size: 0.8rem; font-weight: 500;
    padding: 10px 12px; border-radius: 6px;
    transition: all 0.15s ease;
    text-transform: uppercase; letter-spacing: 0.06em;
}
.header nav a:hover {
    color: var(--text-primary); background: var(--bg-chrome-up2);
    text-decoration: none;
}
.nav-sep {
    width: 1px; height: 16px;
    background: var(--border-chrome);
    opacity: 0.5;
    margin: 0 6px;
}
.header nav a.nav-icon {
    display: inline-flex; align-items: center;
    color: var(--text-muted);
    padding: 8px;
}
.header nav a.nav-icon:hover { color: var(--text-primary); background: transparent; }
.header nav a.nav-cta {
    display: inline-flex; align-items: center; justify-content: center;
    color: white;
    background: var(--accent);
    padding: 7px 16px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    margin-left: 4px;
    text-transform: none;
    line-height: 1;
}
.header nav a.nav-cta:hover {
    background: #2563eb;
    color: white;
}
/* ─── Dropdown (reusable) ─── */
.dropdown { position: relative; }
.dropdown-trigger {
    display: inline-flex; align-items: center; gap: 5px;
    background: none; border: 1px solid var(--border-chrome); border-radius: 6px;
    color: var(--text-muted); font-family: var(--font-ui);
    font-size: 0.72rem; font-weight: 600; letter-spacing: 0.03em;
    padding: 6px 10px; cursor: pointer;
    transition: all 0.15s;
}
.dropdown-trigger:hover { color: var(--text-primary); border-color: var(--text-muted); }
.dropdown-trigger[aria-expanded="true"] { color: var(--text-primary); border-color: var(--accent); }
.dropdown-chevron { transition: transform 0.15s; }
.dropdown-trigger[aria-expanded="true"] .dropdown-chevron { transform: rotate(180deg); }
.dropdown-menu {
    display: none; position: absolute; right: 0; top: calc(100% + 6px);
    background: var(--bg-chrome-up); border: 1px solid var(--border-chrome);
    border-radius: 8px; padding: 4px; margin: 0;
    list-style: none; min-width: 140px; z-index: 200;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.dropdown-menu.open { display: block; }
.dropdown-menu li {
    padding: 8px 12px; border-radius: 5px; cursor: pointer;
    font-size: 0.8rem; color: var(--text-secondary);
    transition: all 0.1s;
}
.dropdown-menu li:hover { background: var(--bg-chrome-up2); color: var(--text-primary); }
.dropdown-menu li.active { color: var(--accent); font-weight: 600; }

/* Language dropdown (uses .dropdown) */
.lang-dropdown { margin-left: 4px; }

/* ─── Hamburger menu (CSS-only) ─── */
.nav-toggle { display: none; }
.nav-toggle-label {
    display: none;
    cursor: pointer;
    width: 36px; height: 36px;
    align-items: center; justify-content: center;
    border-radius: 6px;
    transition: background 0.15s;
}
.nav-toggle-label:hover { background: var(--bg-chrome-up2); }
.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    width: 18px; height: 2px;
    background: var(--text-secondary);
    border-radius: 1px;
    position: relative;
    transition: all 0.15s;
}
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    content: '';
    position: absolute; left: 0;
}
.nav-toggle-label span::before { top: -6px; }
.nav-toggle-label span::after { top: 6px; }
/* Animate to X when open */
.nav-toggle:checked + .nav-toggle-label span { background: transparent; }
.nav-toggle:checked + .nav-toggle-label span::before { top: 0; transform: rotate(45deg); }
.nav-toggle:checked + .nav-toggle-label span::after { top: 0; transform: rotate(-45deg); }

/* ─── Breadcrumbs ─── */
.breadcrumbs {
    padding: 16px 0 0;
    font-size: 0.75rem;
    color: var(--text-muted);
}
.breadcrumbs a { color: var(--text-secondary); padding: 4px 2px; }
.breadcrumbs a:hover { color: var(--text-primary); }

/* ─── Main content ─── */
main { flex: 1; }

/* ─── Footer ─── */
.footer {
    padding: 48px 0;
    border-top: 1px solid var(--border-chrome);
    color: var(--text-muted);
    font-size: 0.8rem;
    text-align: center;
    letter-spacing: 0.04em;
}
.footer a {
    color: var(--text-secondary);
    padding: 8px 4px;
    display: inline-block;
}
.footer-other-project {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border-chrome);
}