/* ============================================================
   HEADER & NAVBAR - GSA SoftEng
   Componentes Reutilizáveis de Navegação
   ============================================================ */

/* ===== HEADER BASE ===== */

.header {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    width: 100%;
    height: 4rem;
}

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

/* ===== NAVBAR ===== */

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
    padding: 0 var(--spacing-4);
}

.nav__brand {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.nav__brand-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    text-decoration: none;
    color: var(--color-text-primary);
    transition: var(--transition-fast);
}

.nav__brand-link:hover {
    opacity: 0.8;
}

.nav__logo-img {
    height: 2.5rem;
    width: auto;
    object-fit: contain;
}

.nav__brand-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary-700);
    letter-spacing: var(--letter-spacing-tight);
}

/* ===== NAVBAR MENU ===== */

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
    flex: 1;
    margin-left: var(--spacing-12);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav__item {
    position: relative;
}

.nav__link {
    display: flex;
    align-items: center;
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    border-radius: var(--radius-md);
}

.nav__link {
    position: relative;
    /* for underline pseudo-element */
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-primary-600);
    /* use text-decoration so underline matches only the text width */
    text-decoration-line: underline;
    text-decoration-color: var(--primary-color);
    text-decoration-thickness: 3px;
    text-underline-offset: 6px;
}

.nav__link.active {
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary-700);
}

/* ===== DROPDOWN MENU ===== */

.nav__item--dropdown {
    position: relative;
}

.nav__dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    cursor: pointer;
}

.nav__dropdown-icon {
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
}

.nav__item--dropdown.active .nav__dropdown-icon {
    transform: rotate(180deg);
}

.nav__dropdown-menu {
    position: absolute;
    top: calc(100% + var(--spacing-2));
    left: 0;
    background: var(--color-white);
    min-width: 220px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-fast);
    z-index: var(--z-dropdown);
}

.nav__item--dropdown.active .nav__dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav__dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav__dropdown-item:first-child {
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
}

.nav__dropdown-item:last-child {
    border-bottom-left-radius: var(--radius-lg);
    border-bottom-right-radius: var(--radius-lg);
}

.nav__dropdown-item:hover {
    background-color: var(--color-primary-50);
    border-left-color: var(--color-primary-500);
    color: var(--color-primary-600);
}

.nav__dropdown-item i {
    font-size: var(--font-size-lg);
    color: var(--color-primary-500);
}

/* ===== NAVBAR CTA ===== */

.nav__cta {
    margin-left: auto;
    white-space: nowrap;
}

/* ===== MOBILE TOGGLE ===== */

.nav__toggle {
    display: none;
    background: transparent;
    /* sem fundo: só o ícone */
    border: none;
    cursor: pointer;
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    /* ícone azul do projeto */
    z-index: var(--z-fixed);
    border-radius: 0;
    /* sem container visual */
    transition: var(--transition-fast);
    padding: 0;
    /* garantir área de toque sem componente visível */
}

/* ===== MOBILE MENU ===== */

@media (max-width: 768px) {
    .nav {
        padding: 0 1rem;
        padding-right: 1rem;
        /* garante espaço do lado direito para o toggle */
    }

    .nav__toggle {
        position: relative;
        width: 44px;
        /* área de toque suficiente */
        height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: transparent;
        /* sem fundo conforme solicitado */
        border: none;
        cursor: pointer;
        padding: 0;
        margin-left: auto;
        margin-right: 0.5rem;
        /* afastar um pouco da borda */
        z-index: 1100;
        /* mais alto que outros elementos para evitar corte */
    }

    .nav__toggle i {
        font-size: 24px;
        color: var(--primary-color);
        /* ícone azul do projeto */
    }

    .nav__toggle:hover {
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(30, 58, 138, 0.04);
    }

    /* garantir que o header não esconda o toggle */
    .header {
        overflow: visible;
    }

    /* Menu móvel: abrir da direita para a esquerda e ocupar 48% da tela.
       Use transform para manter o painel fora da tela sem ocupar espaço quando fechado. */
    .nav__menu {
        position: fixed;
        top: 4rem;
        /* abaixo do header */
        right: 0;
        /* alinhado à direita, escondido com transform */
        left: auto;
        width: 70vw;
        /* Wider drawer for better usability */
        max-width: 300px;
        height: calc(100vh - 4rem);
        /* Full height minus header */
        min-height: calc(100dvh - 4rem);
        /* Support for dynamic viewport height */
        background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 251, 255, 0.98));
        flex-direction: column;
        align-items: flex-start;
        padding: 1.5rem 1rem;
        gap: var(--spacing-4);
        margin: 0;
        transition: transform 0.36s cubic-bezier(.22, .9, .37, 1);
        transform: translateX(100%);
        /* escondido fora da tela */
        overflow-y: auto;
        z-index: 1200;
        box-shadow: -8px 0 30px rgba(13, 38, 78, 0.12);
        border-top-left-radius: 10px;
        border-bottom-left-radius: 10px;
        will-change: transform;
    }

    .nav__menu.active {
        transform: translateX(0);
    }

    .nav__list {
        flex-direction: column;
        width: 100%;
        gap: var(--spacing-1);
    }

    .nav__link {
        width: 100%;
        padding: var(--spacing-3) var(--spacing-4);
        border-radius: var(--radius-md);
    }

    .nav__dropdown-menu {
        position: static;
        opacity: 0;
        visibility: hidden;
        max-height: 0;
        overflow: hidden;
        transform: none;
        background-color: var(--color-gray-50);
        margin-top: var(--spacing-2);
        box-shadow: none;
        transition: all var(--transition-duration-base) var(--transition-timing-ease);
    }

    .nav__item--dropdown.active .nav__dropdown-menu {
        opacity: 1;
        visibility: visible;
        max-height: 400px;
    }

    .nav__dropdown-item {
        padding-left: var(--spacing-8);
    }

    .nav__cta {
        margin-left: 0;
        width: 100%;
        text-align: center;
        margin-top: var(--spacing-4);
    }
}