/* ============================================
   ALPS - header.css
   Componente de navegação reutilizável
   ============================================ */

/* ---- Base do Header ---- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 18px 0;
    transition: padding 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                background 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    background: transparent;
}

.site-header.scrolled {
    padding: 10px 0;
    background: rgba(5, 10, 20, 0.88);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(59, 130, 246, 0.12);
    box-shadow: 0 4px 32px rgba(0, 0, 0, 0.45);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

/* ---- Logo ---- */
.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: #fff;
    box-shadow: 0 4px 12px var(--primary-glow);
    flex-shrink: 0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.logo-link:hover .logo-icon {
    transform: scale(1.08);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.03em;
}

.logo-tagline {
    font-size: 0.68rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.04em;
    margin-top: 1px;
}

/* ---- Navegação Desktop ---- */
.main-nav ul {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 4px;
}

.nav-link {
    display: block;
    padding: 8px 14px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
    text-decoration: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 16px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.07);
}

.nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

.btn-nav {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    padding: 9px 20px;
    font-size: 0.855rem;
    border-radius: var(--radius);
    font-weight: 600;
    box-shadow: 0 4px 12px var(--primary-glow);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 7px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    white-space: nowrap;
}

.btn-nav:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
    background: linear-gradient(135deg, #3b82f6 0%, var(--primary) 100%);
}

/* ---- Botão Hamburger ---- */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
    z-index: 1001;
    position: relative;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.25s ease,
                width 0.25s ease;
    transform-origin: center;
}

.hamburger:hover {
    border-color: var(--accent);
    background: var(--bg-elevated);
}

/* Animação X ao abrir */
.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    width: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---- Overlay de fundo (mobile) ---- */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(5, 10, 20, 0.65);
    backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-overlay.visible {
    opacity: 1;
}

/* ============================================
   RESPONSIVIDADE — MOBILE / TABLET
   ============================================ */

@media (max-width: 900px) {
    .hamburger {
        display: flex;
    }

    .nav-overlay {
        display: block;
        pointer-events: none;
    }

    .nav-overlay.visible {
        pointer-events: auto;
    }

    /* Drawer lateral */
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: min(320px, 85vw);
        height: 100dvh;
        height: 100vh;
        background: var(--bg-surface);
        border-left: 1px solid var(--border);
        box-shadow: -8px 0 40px rgba(0, 0, 0, 0.5);
        z-index: 999;
        transition: right 0.38s cubic-bezier(0.4, 0, 0.2, 1);
        display: flex;
        flex-direction: column;
        overflow-y: auto;
        overflow-x: hidden;
    }

    .main-nav.open {
        right: 0;
    }

    /* Cabeçalho do drawer */
    .main-nav::before {
        content: 'Menu';
        display: block;
        padding: 28px 28px 20px;
        font-size: 0.7rem;
        font-weight: 700;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--text-muted);
        border-bottom: 1px solid var(--border);
        margin-bottom: 12px;
        background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg-surface) 100%);
    }

    .main-nav ul {
        flex-direction: column;
        gap: 4px;
        padding: 8px 16px 32px;
        align-items: stretch;
    }

    .main-nav ul li {
        width: 100%;
    }

    .nav-link {
        display: flex;
        align-items: center;
        padding: 14px 16px;
        font-size: 1rem;
        font-weight: 500;
        border-radius: 10px;
        color: var(--text-secondary);
        transition: var(--transition);
        width: 100%;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link:hover,
    .nav-link.active {
        background: rgba(37, 99, 235, 0.1);
        color: var(--text-primary);
        padding-left: 22px;
    }

    .nav-link.active {
        background: rgba(37, 99, 235, 0.14);
        border-left: 3px solid var(--accent);
        color: var(--accent);
    }

    /* Ícones decorativos nos links mobile */
    .nav-link[data-page="index"]::before    { content: '\f015'; }
    .nav-link[data-page="solucoes"]::before { content: '\f0eb'; }
    .nav-link[data-page="sistemas"]::before { content: '\f009'; }
    .nav-link[data-page="sobre"]::before    { content: '\f05a'; }
    .nav-link[data-page="contato"]::before  { content: '\f0e0'; }

    .nav-link::before {
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        font-size: 0.85rem;
        width: 28px;
        color: var(--text-muted);
        flex-shrink: 0;
        transition: color 0.2s ease;
    }

    .nav-link:hover::before,
    .nav-link.active::before {
        color: var(--accent);
    }

    /* Botão CTA dentro do drawer */
    .btn-nav {
        display: flex;
        justify-content: center;
        width: 100%;
        padding: 14px 20px;
        font-size: 0.95rem;
        margin-top: 4px;
        border-radius: 10px;
    }

    /* Entrada animada dos itens do menu */
    .main-nav.open .nav-link,
    .main-nav.open .btn-nav {
        animation: slideInRight 0.3s ease both;
    }

    .main-nav.open li:nth-child(1) .nav-link  { animation-delay: 0.05s; }
    .main-nav.open li:nth-child(2) .nav-link  { animation-delay: 0.10s; }
    .main-nav.open li:nth-child(3) .nav-link  { animation-delay: 0.15s; }
    .main-nav.open li:nth-child(4) .nav-link  { animation-delay: 0.20s; }
    .main-nav.open li:nth-child(5) .nav-link  { animation-delay: 0.25s; }
    .main-nav.open li:nth-child(6) .btn-nav   { animation-delay: 0.30s; }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@media (max-width: 480px) {
    .logo-tagline {
        display: none;
    }

    .logo-name {
        font-size: 1.35rem;
    }
}