/* ================================================================
   NOVONAV.CSS — Sidebar de navegação lateral
   Complementa novoestilo.css nos modelos com nav (aula-modelo-nav.html)
================================================================ */

/* ================================================================
   LAYOUT — deslocamento do corpo pela sidebar
================================================================ */
body {
    padding-left: 240px;
    min-height: 100vh;
    transition: padding-left 0.25s ease;
}

/* ================================================================
   SIDEBAR
================================================================ */
#nav {
    width: 240px;
    background: #131B24;
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0;
    font-family: 'Source Sans Pro', sans-serif;
    transition: width 0.25s ease, transform 0.25s ease;
}

#nav .nav-header {
    padding: 18px 16px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

#nav .nav-header strong {
    display: block;
    font-size: 0.88rem;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
}

#nav .nav-header span {
    font-size: 0.72rem;
    color: #8fa3b4;
    white-space: nowrap;
}

/* ================================================================
   CATEGORIAS E LINKS
================================================================ */
.nav-category {
    padding: 12px 16px 4px;
    font-size: 0.62rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: #6b8aa0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: 4px;
    white-space: nowrap;
    overflow: hidden;
}

/* Categoria CLICAVEL (titulo maior que ancora num grupo). Precisa de
   especificidade maior que `#nav a` para nao herdar o estilo de item.
   Azul forte p/ ler como link (o cinza de rotulo nao convidava o clique). */
#nav a.nav-cat-link {
    display: block;
    padding: 12px 16px 4px;
    font-size: 0.66rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #4FB0F5;
    border-left: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: 4px;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.12s, background 0.12s;
}

#nav a.nav-cat-link:hover {
    color: #8FD2FF;
    background: rgba(79, 176, 245, 0.12);
    border-left: 0;
}

#nav a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    font-size: 0.82rem;
    color: #c8d6e0;
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: background 0.12s, border-color 0.12s;
    white-space: nowrap;
    overflow: hidden;
}

#nav a:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
    border-left-color: #E25E42;
}

.nav-num {
    font-size: 0.68rem;
    font-weight: 700;
    color: #fff;
    background: #E25E42;
    border-radius: 3px;
    padding: 1px 5px;
    min-width: 24px;
    text-align: center;
    flex-shrink: 0;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
}

/* ================================================================
   BOTÃO DE TOGGLE — fixo na borda direita da sidebar
================================================================ */
#nav-toggle {
    position: fixed;
    top: 16px;
    left: 220px;
    width: 22px;
    height: 22px;
    background: #E25E42;
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 0.7rem;
    line-height: 1;
    cursor: pointer;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: left 0.25s ease, transform 0.25s ease;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
}

#nav-toggle:hover {
    background: #c94e32;
}

#nav-toggle svg {
    display: block;
    transition: transform 0.25s ease;
}

/* ================================================================
   ESTADO RECOLHIDO
================================================================ */
body.nav-collapsed {
    padding-left: 20px;
}

body.nav-collapsed #nav {
    transform: translateX(-240px);
}

body.nav-collapsed #nav-toggle {
    left: 8px;
}

body.nav-collapsed #nav-toggle svg {
    transform: rotate(180deg);
}

/* ================================================================
   BOTÃO MOBILE (hamburger) — visível apenas abaixo de 700px
================================================================ */
#nav-mobile-btn {
    display: none;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 1002;
    width: 36px;
    height: 36px;
    background: #131B24;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
}

#nav-mobile-btn span {
    display: block;
    width: 18px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.2s ease;
}

#nav-mobile-btn:hover {
    background: #E25E42;
}

/* Backdrop overlay — sempre no DOM, animado via opacity */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

/* ================================================================
   MOBILE — oculta sidebar e botão abaixo de 700px
================================================================ */
@media screen and (max-width: 700px) {
    /* Sidebar fora da tela mas ainda no DOM — permite transição */
    #nav {
        display: block;
        transform: translateX(-240px);
        transition: transform 0.25s ease;
        z-index: 1001;
        visibility: hidden;
    }

    #nav-toggle {
        display: none;
    }

    #nav-mobile-btn {
        display: flex;
    }

    body {
        padding-left: 20px;
    }

    /* Sidebar aberta: desliza para dentro */
    body.nav-mobile-open #nav {
        transform: translateX(0);
        visibility: visible;
    }

    /* Overlay visível quando nav aberta */
    body.nav-mobile-open .nav-overlay {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }
}

/* ================================================================
   PRINT — oculta nav e restaura layout de página
================================================================ */
@media print {
    #nav {
        display: none !important;
    }

    #nav-toggle {
        display: none !important;
    }

    #nav-mobile-btn {
        display: none !important;
    }

    .nav-overlay {
        display: none !important;
    }

    body {
        padding-left: 0 !important;
        padding: 0 !important;
    }

    .container {
        max-width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
    }
}