/* ============================================================
   Header & Navegación — Colegio Docksta
   ============================================================ */

/* ── Top Bar ─────────────────────────────────────────────────── */
.topbar {
    background: var(--color-azul-oscuro);
    color: rgba(255,255,255,.85);
    font-size: var(--text-xs);
    height: var(--topbar-height);
    display: flex;
    align-items: center;
}
.topbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}
.topbar__left, .topbar__right {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}
.topbar__link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: rgba(255,255,255,.75);
    transition: color var(--transition-fast);
}
.topbar__link:hover { color: #fff; }

.topbar__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: .2rem .75rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    letter-spacing: .04em;
}
.topbar__badge--matricula {
    background: var(--color-verde);
    color: #fff;
    animation: pulseBadge 2s ease-in-out infinite;
}
@keyframes pulseBadge {
    0%, 100% { opacity: 1; }
    50%       { opacity: .8; }
}

@media (max-width: 640px) {
    .topbar__left { display: none; }
}

/* ── Header Principal ────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    height: var(--header-height);
    background: #fff;
    border-bottom: 1px solid var(--color-gris-200);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base), background var(--transition-base);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header__inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-8);
}

/* ── Logo ─────────────────────────────────────────────────────── */
.header__logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}
.header__logo img {
    height: 52px;
    width: auto;
    transition: opacity var(--transition-fast);
}
.header__logo:hover img { opacity: .85; }

/* ── Navegación ───────────────────────────────────────────────── */
.main-nav { display: flex; align-items: center; }

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav__item { position: relative; }

.nav__link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    transition: color var(--transition-fast), background var(--transition-fast);
    white-space: nowrap;
}
.nav__link:hover,
.nav__link--btn:hover {
    color: var(--color-verde);
    background: var(--color-verde-claro);
}
.nav__link--active {
    color: var(--color-verde) !important;
    font-weight: 600;
}
.nav__link--btn {
    appearance: none;
    background: none;
    border: none;
    font-family: inherit;
    cursor: pointer;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    transition: color var(--transition-fast), background var(--transition-fast);
}

/* ── Dropdown ─────────────────────────────────────────────────── */
.nav__dropdown {
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 50%;
    transform: translateX(-50%);
    min-width: 220px;
    background: #fff;
    border: 1px solid var(--color-gris-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-8px);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
    z-index: var(--z-dropdown);
}
.nav__item--dropdown:hover .nav__dropdown,
.nav__item--dropdown:focus-within .nav__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.nav__dropdown li a {
    display: block;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    color: var(--text-primary);
    transition: background var(--transition-fast), color var(--transition-fast);
}
.nav__dropdown li a:hover {
    background: var(--color-verde-claro);
    color: var(--color-verde-oscuro);
}

/* Flecha del dropdown */
.nav__item--dropdown .nav__link--btn svg {
    transition: transform var(--transition-fast);
}
.nav__item--dropdown:hover .nav__link--btn svg {
    transform: rotate(180deg);
}

/* ── Hamburguesa (Móvil) ──────────────────────────────────────── */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    transition: background var(--transition-fast);
}
.nav-toggle:hover { background: var(--color-gris-100); }
.nav-toggle__bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
    transform-origin: center;
}

/* Estado abierto */
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Overlay ──────────────────────────────────────────────────── */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: calc(var(--z-header) - 1);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    backdrop-filter: blur(2px);
}
.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 960px) {
    .nav-toggle { display: flex; }

    .main-nav {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: min(320px, 85vw);
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        padding: calc(var(--header-height) + var(--space-6)) var(--space-6) var(--space-8);
        overflow-y: auto;
        overflow-x: hidden;
        transform: translateX(100%);
        transition: transform var(--transition-slow);
        z-index: var(--z-header);
        box-shadow: var(--shadow-xl);
    }
    .main-nav.is-open {
        transform: translateX(0);
    }

    .nav__list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    .nav__link, .nav__link--btn {
        width: 100%;
        justify-content: flex-start;
        padding: var(--space-3) var(--space-4);
        font-size: var(--text-base);
        border-radius: var(--radius-md);
    }
    .nav__dropdown {
        position     : static !important;
        left         : auto !important;
        transform    : none !important;
        box-shadow   : none;
        border       : none;
        background   : var(--color-gris-100);
        padding      : var(--space-1) var(--space-1);
        margin-top   : var(--space-1);
        border-radius: var(--radius-md);
        opacity      : 1;
        visibility   : visible;
        display      : none;
        width        : 100%;
        box-sizing   : border-box;
        overflow     : hidden;
    }
    .nav__dropdown li {
        width     : 100%;
        overflow  : hidden;
    }
    .nav__dropdown li a,
    nav.main-nav .nav__dropdown li a {
        display     : flex !important;
        flex-wrap   : nowrap !important;
        align-items : center !important;
        gap         : 8px !important;
        padding     : 9px 8px !important;
        overflow    : hidden;
        width       : 100%;
        box-sizing  : border-box;
    }
    .nav__dropdown li a .nav__dropdown-icon,
    nav.main-nav .nav__dropdown li a .nav__dropdown-icon {
        width      : 26px !important;
        height     : 26px !important;
        flex-shrink: 0 !important;
        min-width  : 26px !important;
    }
    .nav__dropdown li a .nav__dropdown-icon svg {
        width : 13px !important;
        height: 13px !important;
    }
    /* El texto (nodo de texto directo en <a>) se trunca */
    .nav__dropdown li a {
        font-size     : 13.5px !important;
        white-space   : nowrap;
        text-overflow : ellipsis;
    }
    .nav__item--dropdown.is-open .nav__dropdown {
        display: block;
    }
    .nav__item--dropdown:hover .nav__dropdown {
        display: block;
    }
}