/* RESET */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

/* BODY */
body {
    background: linear-gradient(135deg, #000000, #0a0a2a);
    color: white;
}

/* INTRO */
#intro {
    position: fixed;
    width: 100%;
    height: 100vh;
    background: radial-gradient(circle, #000000, #020b1f);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    flex-direction: column;
    z-index: 9999;
    transition: opacity 1s ease;
    overflow: hidden;
}

/* TEIA */
.teia {
    width: 3px;
    height: 0;
    background: white;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation: descerTeia 1.2s ease-out forwards;
}

/* HOMEM-ARANHA IMAGEM */
.spiderman {
    width: 140px;
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    animation: descerHomem 1.6s ease-out forwards;
    animation-delay: 0.2s;
    filter: drop-shadow(0 0 20px red);
}

/* TEXTO INTRO */
.intro-text {
    position: absolute;
    top: 60%;
    width: 100%;
    text-align: center;
    color: #ff0000;
    font-size: 2.2rem;
    opacity: 0;
    animation: aparecerTexto 1s ease forwards;
    animation-delay: 1.8s;
    text-shadow: 0 0 15px red;
}

/* ANIMAÇÕES */
@keyframes descerTeia {
    from { height: 0; }
    to { height: 350px; }
}

@keyframes descerHomem {
    0% { top: -200px; transform: translateX(-50%) rotate(-10deg); }
    70% { top: 180px; transform: translateX(-50%) rotate(5deg); }
    100% { top: 160px; transform: translateX(-50%) rotate(0deg); }
}

@keyframes aparecerTexto {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

/* HEADER */
header {
    background: linear-gradient(90deg, #8B0000, #000000, #001f5c);
    text-align: center;
    padding: 30px 20px;
    border-bottom: 3px solid #ff0000;
}

header h1 {
    font-size: 2.5rem;
    color: #ff0000;
}

header p {
    color: #ccc;
    margin-top: 10px;
}

/* MENU */
nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
}

nav ul li {
    cursor: pointer;
    padding: 10px 20px;
    transition: 0.3s;
    font-weight: bold;
}

nav ul li:hover {
    border-bottom: 2px solid #ff0000;
    color: #00aaff;
}

/* MAIN */
main {
    padding: 40px;
}

/* SEÇÕES */
.secao {
    display: none;
}

.secao.ativa {
    display: block;
}

/* TITULOS */
h2 {
    margin-bottom: 20px;
    color: #00aaff;
}

/* CARDS */
.card {
    background: #111;
    border-left: 5px solid #ff0000;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 10px;
    transition: 0.3s;
}

.card:hover {
    transform: scale(1.02);
    border-left: 5px solid #00aaff;
}

/* HEADER DO CARD */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

/* SETA */
.seta {
    transition: transform 0.3s ease;
}

/* CONTEÚDO */
.card-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
}



/* CÓDIGO */
pre {
    background: #0a0a0a;
    color: #00ff88;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
    margin-top: 10px;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 20px;
    border-top: 2px solid #222;
    margin-top: 30px;
    color: #888;
}