* {
    margin: 0;
    padding: 0;
    font-family: Arial, verdana, tahoma;
}

html {
    scroll-behavior: smooth;
}

:root {
  --principal: #000000;
  --secundaria: #51ff00;
  --terciaria:  #2a7f00;
}

body {
    background-color: var(--principal);
    color: var(--secundaria);
}

header {
    display: flex;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: var(--principal);
    margin: 0;
    padding: 20px 50px;
    box-sizing: border-box;
}

.header-nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

.button-nav {
    color: var(--secundaria);
    text-decoration: none;
    transition: 0.2s;
}

.button-nav:hover {
    color: var(--terciaria);
    transition: 0.2s;
}

main {
    padding-top: 80px;
}

.logo img {
    width: 50px;
}

.radioativo {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 120px;
    color: var(--secundaria);
    animation: pulso 2s ease-in-out infinite;
}

#hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 100vh;
    gap: 24px;
}

.tagline {
    font-size: 20px;
    color: var(--terciaria);
    font-style: italic;
}

.botao-jogar {
    display: inline-block;
    padding: 14px 40px;
    border: 2px solid var(--secundaria);
    color: var(--secundaria);
    text-decoration: none;
    font-size: 18px;
    font-weight: bold;
    border-radius: 4px;
    transition: 0.3s;
}

.botao-jogar:hover {
    background-color: var(--secundaria);
    color: var(--principal);
}

@keyframes pulso {
    0%   { text-shadow: 0 0 4px var(--secundaria), 0 0 8px var(--secundaria); color: var(--secundaria); }
    50%  { text-shadow: 0 0 10px #b6ff00, 0 0 30px var(--secundaria), 0 0 60px var(--terciaria); color: #ccff00; }
    100% { text-shadow: 0 0 4px var(--secundaria), 0 0 8px var(--secundaria); color: var(--secundaria); }
}

#sobre {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 80px 20px;
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

#sobre p {
    font-size: 18px;
    color: var(--terciaria);
    line-height: 1.8;
}

.controles {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    width: 100%;
}

.controles h3 {
    font-size: 24px;
    color: var(--secundaria);
    letter-spacing: 2px;
}

.controles-grid {
    display: flex;
    justify-content: center;
    gap: 48px;
}

.controle-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.controle-item img {
    width: 120px;
}

.controle-item p {
    font-size: 14px;
}

#galeria {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 80px 20px;
    gap: 40px;
}

.galeria-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    max-width: 900px;
    width: 100%;
}

.galeria-grid img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    border: 1px solid var(--terciaria);
    border-radius: 4px;
    transition: 0.3s;
}

.galeria-grid img:hover {
    border-color: var(--secundaria);
    box-shadow: 0 0 12px var(--secundaria);
}

#contato {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 80px 20px;
    gap: 32px;
}

.titulo-secao {
    font-size: 48px;
    color: var(--secundaria);
    font-family: system-ui, sans-serif;
}

form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 400px;
}

form input,
form textarea {
    padding: 12px 16px;
    background: var(--principal);
    border: 1px solid var(--terciaria);
    border-radius: 4px;
    color: var(--secundaria);
    font-size: 16px;
    outline: none;
    transition: 0.3s;
}

form input:focus,
form textarea:focus {
    border-color: var(--secundaria);
    box-shadow: 0 0 8px var(--terciaria);
}

form input::placeholder,
form textarea::placeholder {
    color: var(--terciaria);
}

form textarea {
    resize: vertical;
    min-height: 70px;
}

form button {
    padding: 14px;
    background: transparent;
    border: 2px solid var(--secundaria);
    border-radius: 4px;
    color: var(--secundaria);
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

form button:hover {
    background: var(--secundaria);
    color: var(--principal);
}


footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
    gap: 16px;
    border-top: 1px solid var(--terciaria);
}

footer img {
    width: 60px;
}

footer p {
    font-size: 14px;
    color: var(--terciaria);
}

.footer-nav {
    display: flex;
    gap: 24px;
}

.footer-nav a {
    color: var(--secundaria);
    text-decoration: none;
    font-size: 14px;
    transition: 0.3s;
}

.footer-nav a:hover {
    text-decoration: underline;
}

.hamburguer {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburguer span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--secundaria);
    transition: 0.3s;
}

@media (max-width: 600px) {
    .hamburguer {
        display: flex;
    }

    .header-nav {
        display: none;
        flex-direction: column;
        align-items: center;
        gap: 0;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--principal);
        border-top: 1px solid var(--terciaria);
        padding: 16px 0;
    }

    .header-nav.aberto {
        display: flex;
    }

    .button-nav {
        width: 100%;
        text-align: center;
        padding: 14px 0;
        border-bottom: 1px solid #111;
    }

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