* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            background-image: url('/img/backgroundphoto.png');
            font-family: Arial, Helvetica, sans-serif;

            color: #ffffff;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            padding: 20px;
        }
       .container {
            max-width: 600px;
            width: 100%;
            text-align: center;
            border-radius: 20px;
            padding: 40px 20px;
            background: rgb(6, 0, 90);
        }
       .tela { display: none; }
       .tela.ativa { display: block; }

       /* Tela 3 em tela cheia */
       #tela-celebracao {
            position: fixed;
            inset: 0;
            width: 100%;
            height: 100%;
            padding: 40px 20px;
            background: rgb(6, 0, 90);
            border-radius: 0;
            overflow: auto;
            z-index: 1;
        }
       
        /* Tela 1 - Botão inicial */
        #tela-inicio h1 {
            font-size: 32px;
            margin-bottom: 40px;
        }
       
        /* Botões padrão */
       .btn {
            border-radius: 20px;
            padding: 12px 30px;
            background: rgb(11, 109, 2);
            font-size: 18px;
            cursor: pointer;
            font-family: inherit;
            margin: 10px;
        }
       .btn:hover { background: #333; color: white; }
       .btn-grande { font-size: 22px; padding: 15px 40px; }

        /* Tela 2 - Formulário */
        #form-participar {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin: 30px auto;
            max-width: 350px;
        }
        #form-participar input {
            padding: 12px;
            border: 2px solid #333;
            font-size: 16px;
            font-family: inherit;
            text-align: center;
        }
        #form-participar label {
            font-size: 18px;
            text-align: left;
        }

        /* Tela 3 - Celebração */
        header {
            background: rgba(255, 255, 255, 0.06);
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
            padding: 20px 20px 18px;
            margin-bottom: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }
        header h1 { font-size: 26px; color: var(--text); }
        nav a {
            margin-left: 10px;
            text-decoration: none;
            color: var(--text);
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 999px;
            padding: 8px 14px;
            font-size: 14px;
            transition: background 0.25s ease, transform 0.2s ease;
        }
        nav a:hover {
            background: rgba(233, 69, 96, 0.18);
            transform: translateY(-1px);
        }
       .boas-vindas {
            font-size: 28px;
            line-height: 1.5;
            margin: 0;
            color: var(--text);
        }
       .botoes-acao { margin-top: 40px; }

       /* Layout da celebração */
       .celebracao-layout {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            margin-bottom: 30px;
            flex-wrap: wrap;
            margin-top: 5px;
        }
       .mensagem { flex: 1; text-align: left; }
       .foto { flex: 1; text-align: center; }
       .foto img { max-width: 100%; height: auto; border-radius: 24px; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35); }

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}
.modal-content {
    background-color: rgb(6, 0, 90);
    margin: 10% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 100%;
    max-width: 500px;
    border-radius: 20px;
    color: white;
}
.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}
.close:hover { color: white; }
#mensagem-texto {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border-radius: 10px;
    border: none;
    font-family: inherit;
    font-size: 16px;
}
.modal-buttons { display: flex; justify-content: space-around; flex-wrap: wrap; }

/* Slideshow */
.slideshow { text-align: center; }
.slideshow img { margin: 10px 10; border-radius: 10px; transition: opacity 0.5s ease; opacity: 1; }
.slide-buttons { display: flex; justify-content: center; gap: 20px; }