:root {
    --amarelo: #ffcc00;
    --preto: #000000;
    --cinza-escuro: #1a1a1a;
    --cinza-claro: #333333;
    --texto-cinza: #cccccc;
}

body {
    background-color: var(--preto);
    color: #ffffff;
    font-family: 'Roboto', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    background-color: var(--cinza-escuro);
    padding: 40px;
    border-radius: 5px;
    box-shadow: 0 0 20px rgba(255, 204, 0, 0.1);
    width: 100%;
    max-width: 400px;
    border-left: 4px solid var(--amarelo);
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-family: 'Oswald', sans-serif;
    font-size: 2.5em;
    margin: 0;
    letter-spacing: 2px;
}

header h1 span {
    color: var(--amarelo);
}

header p {
    font-size: 0.8em;
    letter-spacing: 3px;
    color: var(--texto-cinza);
    margin-top: 5px;
}

.input-group { margin-bottom: 18px; }
.row { display: flex; gap: 15px; }

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 700;
    font-size: 0.75em;
    text-transform: uppercase;
    color: var(--amarelo);
}

input, select, textarea {
    width: 100%;
    padding: 12px;
    border-radius: 4px;
    border: 1px solid var(--cinza-claro);
    background-color: var(--preto);
    color: white;
    box-sizing: border-box;
    transition: 0.3s;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--amarelo);
    outline: none;
}

button {
    width: 100%;
    padding: 15px;
    background-color: var(--amarelo);
    color: var(--preto);
    border: none;
    border-radius: 4px;
    font-family: 'Oswald', sans-serif;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
    margin-top: 10px;
}

button:hover {
    background-color: #e6b800;
    transform: scale(1.02);
}

.hidden { display: none; }
#mensagem {
    margin-top: 20px;
    text-align: center;
    font-weight: bold;
    color: var(--amarelo);
    border: 1px solid var(--amarelo);
    padding: 10px;
}

.hidden-field {
    display: none;
    background: rgba(255, 68, 68, 0.05);
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    border: 1px dashed #ff4444;
}

.show-field {
    display: block;
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 480px) {
    .row { flex-direction: column; gap: 0; }
}