/* header.css */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--c-bg-primary);
    border-bottom: 1px solid var(--c-card-border);
}
.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: var(--header-h);
    padding-block: 0.5rem;
}
.header__logo { flex: 0 0 auto; }
.header__logo img { width: 150px; height: auto; }

/* Nav */
.header__nav { display: flex; align-items: center; gap: 1.5rem; }
.header__nav-list {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}
.header__nav-link {
    display: inline-block;
    padding: 0.5rem 0.85rem;
    color: var(--c-text);
    font-weight: var(--fw-medium);
    border-radius: var(--radius-card);
    transition: color var(--transition-fast), background var(--transition-fast);
}
.header__nav-link:hover { color: var(--c-white); background: rgba(255, 255, 255, 0.04); }
.header__nav-link--active { color: var(--c-heading); }

.header__cta {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}
.header__cta .btn { padding: 0.6rem 1.1rem; }
.header__flag { display: inline-flex; border-radius: 3px; overflow: hidden; box-shadow: 0 0 0 1px rgba(255,255,255,0.15); }
.header__flag svg { display: block; border-radius: 3px; }

/* Burger */
.header__burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px; height: 44px;
    padding: 10px;
    order: 3;
}
.header__burger-bar {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--c-white);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.header__burger[aria-expanded="true"] .header__burger-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.header__burger[aria-expanded="true"] .header__burger-bar:nth-child(2) { opacity: 0; }
.header__burger[aria-expanded="true"] .header__burger-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile */
@media (max-width: 991px) {
    .header__burger { display: flex; }
    .header__nav {
        position: fixed;
        inset: var(--header-h) 0 auto 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--c-bg-primary);
        border-bottom: 1px solid var(--c-card-border);
        padding: 1rem var(--container-pad) 1.5rem;
        max-height: calc(100dvh - var(--header-h));
        overflow-y: auto;
        transform: translateY(-120%);
        transition: transform var(--transition);
        box-shadow: var(--shadow-card);
    }
    .header__nav.is-open { transform: translateY(0); }
    .header__nav-list { flex-direction: column; align-items: stretch; gap: 0; width: 100%; }
    .header__nav-item { border-bottom: 1px solid var(--c-card-border); }
    .header__nav-link { display: block; padding: 0.9rem 0.5rem; font-size: 1.05rem; }
    .header__cta {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
        margin-top: 1.25rem;
    }
    .header__cta .btn { width: 100%; padding: 0.85rem 1rem; }
    .header__flag { align-self: center; margin-top: 0.25rem; }
}