:root {
    --white: #fff;
    --text-black: #000;
    --bg: #f0f0f0;
    --bg-primary: #e7e7e7;
    --bg-btn-close: #f44336;
    --gray-light: #f4f4f4;
    --dark-gray: #656565;
    --blue-50: #1700d0;
    --blue-100: #100092;


    --gradiente: linear-gradient(to right, #00bcd4, #0833c1);
}

/* ==================== RESET BÁSICO ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: var(--bg);
}

/* ==================== HEADER (CABEÇALHO) ==================== */
header {
    background: var(--gradiente);
    padding: 15px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

/* ==================== HEADER LEFT: Icon + Text ==================== */
.header-left {
    display: flex;
    align-items: center;
    gap: 10px; /* DIMINUÍDO de 15px para 10px - mais perto do texto */
}

/* ==================== ÍCONE NO HEADER ==================== */
.header-icon {
    background-color: transparent; /* SEM BACKGROUND */
    padding: 0; /* Remove padding */
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px; /* AUMENTADO de 50px para 60px */
    height: 60px; /* AUMENTADO de 50px para 60px */
    overflow: hidden;
}

/* Estilo para IMAGEM dentro do header-icon */
.header-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}



/* ==================== HEADER ==================== */
header {
    color: var(--white);
    font-size: 24px;
    font-weight: 200;
}

header:hover {
    color: var(--blue-50);
    font-weight: bold;
}

/* ==================== HEADER RIGHT: BOTOES DE CONTROLE ==================== */

.header-right {
    display: flex;
    align-items: center;
    gap: 10px; /* DIMINUÍDO de 15px para 10px - mais perto do texto */
    
}


.window-controls {
    display: flex;
    gap: 10px;
    margin-right: 15px;
   
}


.window-btn-minimize {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.3);
    border: none;
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    font-weight: bold;
    transition: background-color 0.3s ease;
    border: 0.05rem solid var(--text-black);
}

.window-btn-minimize:hover {
    background-color: rgba(23, 60, 243, 0.918);
    border: 0.05rem solid var(--white);
}

.minimizar {
    margin-top: 20px;
}

.window-btn-close {
    width: 40px;
    height: 40px;
   background-color: var(--bg-btn-close);
    border: none;
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    font-weight: bold;
    transition: background-color 0.3s ease;
    border: 0.05rem solid var(--text-black);
}

.window-btn-close:hover {
   background-color: #d32f2f;
  border: 0.05rem solid var(--white);
}

.window-btn-maximizar {
     width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.3);
    border: none;
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    font-weight: bold;
    transition: background-color 0.3s ease;
    border: 0.05rem solid var(--text-black);
}

.window-btn-maximizar:hover {
 background-color: rgba(23, 60, 243, 0.918);
 border: 0.05rem solid var(--white);
}

/* ==================== SEÇÃO DO BANNER ==================== */
        .banner {
            background: linear-gradient(to bottom, #1a237e, #0d47a1);
            padding: 10px;
            margin: 0px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.3);
        }

        /* ==================== DIV DO TÍTULO "ENTENDENDO A BASE DA WEB" ==================== */
        .banner-content {
            background-color: white;
            padding: 30px;
            border: 4px solid #000;
            display: flex; /* DISPLAY FLEX - organiza ícone e texto lado a lado */
            align-items: center;
            gap: 20px;
           
        }

        /* ==================== ÍCONE DE INFORMAÇÃO ==================== */
        .info-icon {
            width: 60px;
            height: 60px;
            background-color: white;
            border: 3px solid #2196f3;
            border-radius: 50%; /* Faz ficar redondo */
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0; /* Não encolhe */
        }

        .info-icon::before {
            content: 'i';
            color: #2196f3;
            font-size: 36px;
            font-weight: bold;
            font-style: italic;
        }

        

        .banner-content h1 {
            font-size: 3rem;
            font-weight: bold;
            
        }

        /* ==================== CONTAINER PRINCIPAL ==================== */
        .container {
            padding: 40px;
            margin: 20px;
            background-color: white;
            border: 3px solid var(--blue-100);
            border-radius: 8px;
            min-height: 500px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ==================== DISPLAY FLEX - ORGANIZAÇÃO PRINCIPAL ==================== */
        .content-wrapper {
            display: flex;
            gap: 60px;
            align-items: center;
            justify-content: center;
            width: 100%;
            max-width: 1200px;
        }

        /* ==================== SEÇÃO ESQUERDA (ÍNDICE) ==================== */
        .index-section {
            flex: 0 0 40%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            height: 100%;
        }

        .index-section h3 {
            font-size: 64px;
            margin-bottom: -40px;
            font-weight: bold;
        }

        /* ==================== ÍCONE DO MOUSE ==================== */
        .cursor-icon {
            
            
            filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.3));
       

        }

       .cursor-icon img {
       margin-left: 12rem;
       width: 60%;
       height: 60px;
       margin-bottom: -100px;
     
      

  
       }
        /* ==================== DISPLAY GRID - GRADE DE BOTÕES ==================== */
        .buttons-grid {
            flex: 0 0 60%;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            align-content: center;
            justify-items: stretch;
            padding: 20px 20px;
        }

        /* ==================== ESTILO DOS BOTÕES ==================== */
        .menu-button {
            background-color: #d0d0d0;
            border: 2px solid #333;
            padding: 20px;
            text-align: center;
            font-size: 18px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            text-decoration: none;
            color: var(--text-black);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .menu-button:hover {
            background-color: #b0b0b0;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }

/* ==================== SEÇÃO DE CONTEÚDO ==================== */
        .content-section {
            padding: 40px;
            margin: 20px;
            background-color: white;
            border: 3px solid var(--blue-100);
            border-radius: 8px;
        }

        .content-section h2 {
            color: var(--blue-100);
            font-size: 32px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--blue-50);
        }

        .content-section h3 {
            color: var(--blue-50);
            font-size: 24px;
            margin-top: 30px;
            margin-bottom: 15px;
        }

        .content-section p {
            margin-bottom: 15px;
            color: #333;
        }

        .content-section ul,
        .content-section ol {
            margin-left: 30px;
            margin-bottom: 15px;
        }

        .content-section li {
            margin-bottom: 8px;
        }

        .content-section blockquote {
            background-color: var(--gray-light);
            border-left: 5px solid var(--blue-50);
            padding: 15px 20px;
            margin: 20px 0;
            font-style: italic;
        }

        .content-section a {
            color: var(--blue-50);
            text-decoration: none;
            font-weight: bold;
        }

        .content-section a:hover {
            text-decoration: underline;
        }

        .content-section hr {
            border: none;
            border-top: 2px solid var(--dark-gray);
            margin: 30px 0;
        }

        /* ==================== FOOTER ==================== */
        footer {
           
    background: var(--gradiente);
    padding: 15px 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
        .footer-left {
color: var(--white);
font-weight: bold;


        }


        .footer-right {
            font-weight: 900;
            color: var(--white);
           
            margin-left: 200px;
        }

        /* ==================== BOTÃO VOLTAR AO TOPO ==================== */
        .back-to-top {
            position: fixed;
            bottom: 80px;
            right: 30px;
            background-color: var(--blue-50);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            font-size: 24px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.3);
            transition: all 0.3s ease;
            opacity: 0;
            pointer-events: none;
        }

        .back-to-top.visible {
            opacity: 1;
            pointer-events: all;
        }

        .back-to-top:hover {
            background-color: var(--);
            transform: translateY(-5px);
        }

        /* ==================== RESPONSIVIDADE ==================== */
        /* MOBILE - Telas pequenas (até 768px) */
        @media (max-width: 768px) {
            header {
                padding: 10px 15px;
            }

            .header-left {
                flex: 1;
            }

            header h1 {
                font-size: 14px;
            }

            .header-icon {
                width: 40px;
                height: 40px;
            }

            .window-btn {
                width: 35px;
                height: 35px;
                font-size: 16px;
            }

            .banner {
                margin: 10px;
                padding: 10px;
            }

            .banner-content {
                padding: 15px;
                flex-direction: column;
                text-align: center;
            }

            .banner-content h2 {
                font-size: 32px;
            }

            .info-icon {
                width: 50px;
                height: 50px;
            }

            .container {
                margin: 10px;
                padding: 20px;
                min-height: auto;
            }

            .content-wrapper {
                flex-direction: column;
                gap: 40px;
                max-width: 100%;
            }

            .index-section {
                flex: 1;
                width: 100%;
                margin-bottom: 20px;
            }

            .index-section h3 {
                font-size: 48px;
                margin-bottom: 0;
            }

            /* Esconde o mouse no mobile */
            .cursor-icon {
                display: none;
            }

            /* Grid vira 1 coluna no mobile */
            .buttons-grid {
                grid-template-columns: 1fr;
                width: 100%;
            }

            .menu-button {
                font-size: 16px;
                padding: 15px;
            }

            .content-section {
                padding: 20px;
                margin: 10px;
            }

            .content-section h2 {
                font-size: 24px;
            }

            .content-section h3 {
                font-size: 20px;
            }

            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 45px;
                height: 45px;
            }
        }

        /* TABLET - Telas médias (769px a 1024px) */
        @media (min-width: 769px) and (max-width: 1024px) {
            header h1 {
                font-size: 20px;
            }

            .banner-content h2 {
                font-size: 48px;
            }

            .container {
                padding: 30px;
                min-height: 450px;
            }

            .content-wrapper {
                gap: 40px;
                max-width: 900px;
            }

            .index-section {
                flex: 0 0 35%;
            }

            .index-section h3 {
                font-size: 52px;
            }

            .cursor-icon {
                font-size: 52px;
            }

            .buttons-grid {
                flex: 0 0 65%;
            }

            .menu-button {
                font-size: 16px;
                padding: 18px;
            }

            .content-section {
                padding: 30px;
            }
        }

        /* DESKTOP GRANDE - Telas muito grandes (acima de 1400px) */
        @media (min-width: 1400px) {
            .container,
            .banner,
            .content-section {
                max-width: 1400px;
                margin: 20px auto;
            }
        }

        /* LANDSCAPE MOBILE - Celular deitado */
        @media (max-width: 768px) and (orientation: landscape) {
            .banner-content h2 {
                font-size: 28px;
            }

            .index-section h3 {
                font-size: 36px;
            }

            .buttons-grid {
                grid-template-columns: 1fr 1fr;
            }
        }