@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

:root{
    --cor-verde: rgb(97, 136, 25);
    --cor-destaque: rgb(55, 105, 16);
    --cor-fundo: rgb(30, 30, 30);
    --cor-fundo-2: rgba(255, 255, 255, 0.05);
    --cor-cinza: rgb(45, 45, 45);
    --cor-letra: rgb(245, 245, 245);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

header {
    background-color: var(--cor-cinza);
    display: flex;
    justify-content: space-between; 
    align-items: center;
    padding: 15px 30px;
    width: 100vw;
    border-bottom: 3px solid var(--cor-verde);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000; 
}
.logo img {
    width: 180px;    
}
.menu-toggle {
    display: none;
    font-size: 26px;
    background: none;
    border: none;
    color: var(--cor-letra);
    cursor: pointer;
}
header nav {
    display: flex;
    gap: 20px;
}

header a {
    color: var(--cor-letra);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s ease-in-out;
    padding: 5px 10px;
    border-radius: 5px;
}

header a:hover {
    background-color: var(--cor-destaque);
}

body, html {
    height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--cor-fundo);
    color: var(--cor-letra);
}

main {
    display: flex;
    flex: 1;
    margin-top: 60px;
}

.conteudo {
    display: flex;
    flex: 1;
    margin-top: 60px;
    margin-left: 350px;
    padding: 24px;
    justify-content: center;
}

#asideManual {
    width: 350px;
    background-color: var(--cor-cinza);
    padding: 20px;
    border-right: 1px solid var(--cor-destaque);
    flex-shrink: 0;
    position: fixed;
    top: 60px;
    height: calc(100vh - 60px);
    overflow-y: auto;
}

#navManual a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    margin: 8px 0;
    background-color: var(--cor-verde);
    color: var(--cor-letra);
    text-decoration: none;
    border-radius: 5px;
    font-size: 14px;
    transition: all 0.3s;
    
}

#navManual a:hover {
    background-color: var(--cor-destaque);
    transform: scale(1.05);
}

#asideManual::-webkit-scrollbar {
    width: 8px;
}
#asideManual::-webkit-scrollbar-track {
    background: transparent;
}
#asideManual::-webkit-scrollbar-thumb {
    background-color: var(--cor-destaque);
    border-radius: 4px;
}

.concept {
    display: none;
    padding: 25px;
    max-width: 1000px;
    margin: auto;
    background-color: var(--cor-fundo-2);
    border-radius: 8px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.3);
    transition: opacity 0.3s ease-in-out;
}

.concept.active {
    display: block;
    opacity: 1;
}
.concept h2, h3 {
    color: var(--cor-verde);
    margin-bottom: 10px;
    border-left: 5px solid var(--cor-verde);
    padding-left: 10px;
}

.concept p, .concept ul {
    font-size: 16px;
    line-height: 1.6;
    text-indent: 2em;
}

.concept ul {
    padding-left: 20px;
}

.concept ul li {
    margin-bottom: 8px;
}

/* =====================================================
   EXTRA LARGE — até 1900px
===================================================== */
@media (max-width: 1900px) {
    .concept {
        max-width: 1100px;
    }
}

/* =====================================================
   EXTRA LARGE — até 1600px
===================================================== */
@media (max-width: 1600px) {
    .concept {
        max-width: 1000px;
    }
}

/* =====================================================
   LARGE — até 1200px (Desktop menor)
===================================================== */
@media (max-width: 1200px) {

    #asideManual {
        width: 300px;
    }

    .conteudo {
        margin-left: 300px;
    }
}

/* =====================================================
   MEDIUM — até 992px (Tablet)
===================================================== */
@media (max-width: 992px) {

    main {
        flex-direction: column;
    }

    #asideManual {
        position: static;
        width: 100%;
        height: auto;
        border-right: none;
        margin-top: 20px;
    }

    .conteudo {
        margin-left: 0;
        margin-top: 0;
        padding: 18px;
        flex-direction: column;
    }

    .concept {
        margin: 12px 0;
        padding: 20px;
    }
}

/* =====================================================
   SMALL — até 768px (Tablet pequeno / celular grande)
===================================================== */
@media (max-width: 768px) {

    header {
        padding: 12px 18px;
    }

    .logo img {
        width: 150px;
    }

    /* ativa menu burger */
    .menu-toggle {
        display: block;
    }

    header nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--cor-cinza);

        flex-direction: column;
        align-items: center;
        gap: 0;

        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;

        border-bottom: 2px solid var(--cor-verde);
    }

    header nav a {
        width: 100%;
        text-align: center;
        padding: 14px;
        border-top: 1px solid rgba(255,255,255,0.05);
    }

    header nav.active {
        max-height: 350px;
    }
}

/* =====================================================
   EXTRA SMALL — até 480px (Celular)
===================================================== */
@media (max-width: 480px) {

    header {
        padding: 10px 14px;
    }

    .logo img {
        width: 130px;
    }

    .concept {
        padding: 16px;
    }

    .concept p,
    .concept ul {
        font-size: 15px;
        text-indent: 1em;
    }
}