@import url('https://fonts.googleapis.com/css2?family=Segoe+UI:wght@400;700;800&family=Fira+Code:wght@500&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: radial-gradient(circle at 50% 50%, #2c5c7d 0%, #162a3a 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.fundo-tela {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
}

.container-principal {
    background: #fdfbf4;
    width: 100%;
    max-width: 580px;
    border-radius: 28px;
    padding: 50px 45px 40px 45px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.6);
}

.titulo {
    color: #1a3245;
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 35px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-align: center;
}

.caixa-resultado {
    width: 100%;
    margin-bottom: 35px;
    text-align: center;
}

.resultado {
    background: #f1ede1;
    width: 100%;
    min-height: 80px;
    border-radius: 16px;
    border: 2px dashed #e5e0cc;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    font-family: 'Fira Code', monospace;
    font-size: 24px;
    color: #1c5271;
    word-break: break-all;
    cursor: pointer;
    transition: all 0.3s ease;
}

.resultado:hover {
    background: #ebe7d8;
    transform: translateY(-2px);
}

.dica {
    color: #1a3245;
    font-size: 14px;
    font-weight: 700;
    margin-top: 10px;
    letter-spacing: 1px;
    opacity: 0.8;
}

.opcoes-painel {
    width: 100%;
    background: rgba(241, 237, 225, 0.5);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 35px;
    border: 1px solid #e5e0cc;
}

.grupo-controle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(229, 224, 204, 0.5);
}

.grupo-controle:last-child {
    border-bottom: none;
}

.grupo-controle label {
    color: #1a3245;
    font-size: 18px;
    font-weight: 700;
}

.quantidade-caracteres {
    width: 70px;
    padding: 8px;
    border: 2px solid #e5e0cc;
    border-radius: 10px;
    background: #fff;
    text-align: center;
    font-size: 18px;
    font-weight: 700;
    color: #1c5271;
}

input[type="checkbox"] {
    width: 24px;
    height: 24px;
    cursor: pointer;
    accent-color: #214f6d;
}

.gerar {
    background: #214f6d;
    color: #ffffff;
    width: 100%;
    border: none;
    border-radius: 18px;
    padding: 22px 0;
    font-size: 24px;
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(33, 79, 109, 0.3);
    transition: all 0.4s ease;
}

.gerar:hover {
    background: #1a3e56;
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(33, 79, 109, 0.4);
}

.gerar:active {
    transform: translateY(-1px);
}

/* Responsividade */
@media (max-width: 600px) {
    .container-principal {
        padding: 35px 25px;
    }
    .titulo {
        font-size: 32px;
    }
    .resultado {
        font-size: 18px;
    }
    .grupo-controle label {
        font-size: 16px;
    }
}