@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden; /* Desktop não rola */
    background: #120A2E;
    position: relative;
}

/* ===============================
   FUNDO (ESTRELAS)
================================ */
.estrelas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0; /* Fica no fundo */
    pointer-events: none; /* Deixa clicar através das estrelas */
    background-image:
        radial-gradient(1px 1px at 25% 15%, #fff, transparent),
        radial-gradient(1px 1px at 50% 40%, #fff, transparent),
        radial-gradient(2px 2px at 15% 55%, #fff, transparent),
        radial-gradient(1px 1px at 70% 25%, #fff, transparent),
        radial-gradient(1.5px 1.5px at 84% 60%, #fff, transparent),
        radial-gradient(1px 1px at 35% 75%, #fff, transparent),
        radial-gradient(1.5px 1.5px at 10% 20%, #fff, transparent),
        radial-gradient(2px 2px at 79% 90%, #fff, transparent),
        radial-gradient(1px 1px at 4% 7%, #fff, transparent),
        radial-gradient(1px 1px at 40% 5%, #fff, transparent);
}

/* ===============================
   BOTÃO VOLTAR (FIXO)
================================ */
.back-btn {
    position: fixed; /* Prende na tela */
    top: 20px;
    left: 20px;
    z-index: 9999; /* ACIMA DE TUDO */
    
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    
    padding: 10px 20px;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    cursor: pointer;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* ===============================
   FORMULÁRIO
================================ */
.formulario {
    width: 400px;
    background-color: rgba(255, 255, 255, .03);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px); /* O culpado! Mas agora com o HTML certo, não atrapalha mais */
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    color: #fff;
    border-radius: 16px;
    padding: 35px;
    z-index: 1; /* Fica acima das estrelas */
}

.formulario h1 {
    font-size: 28px;
    text-align: center;
    margin-bottom: 30px;
    font-weight: 600;
}

.caixa-formulario {
    position: relative;
    margin-bottom: 30px;
}

.caixa-formulario input {
    width: 100%;
    height: 50px;
    border: none;
    border-radius: 10px;
    outline: none;
    color: #fff;
    background-color: rgba(255, 255, 255, 0.1);
    font-size: 16px;
    padding: 0 20px;
}

.caixa-formulario input::placeholder {
    color: rgba(255, 255, 255, 1.);
}

.caixa-formulario i {
    position: absolute;
    right: 5%;
    font-size: 20px;
    top: 25%;
}

.caixa-lembrar-esqueci {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 25px;
    font-size: 16px;
    font-weight: 500;
}

.caixa-lembrar-esqueci label {
    display: flex;
    align-items: center;
    gap: 5px;
}

.caixa-lembrar-esqueci label input {
    accent-color: rgb(136, 49, 194);
}

.caixa-lembrar-esqueci a {
    text-decoration: none;
    color: #fff;
    font-weight: 500;
}

.caixa-lembrar-esqueci a:hover {
    text-decoration: underline;
}

button {
    width: 100%;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 10px;
    outline: none;
    cursor: pointer;
    color: #2a1b6d;
    font-size: 16px;
    font-weight: 600;
}

button:hover {
    background-color: #fff;
    transform: translateY(-3px);
}

.link-registro {
    text-align: center;
    margin-top: 25px;
    font-size: 14px;
}

.link-registro a {
    text-decoration: none;
    color: white;
    font-weight: 500;
}

.link-registro a:hover {
    text-decoration: underline;
}

/* =======================================================
   RESPONSIVIDADE (TABLET E MOBILE UNIFICADOS)
======================================================= */

/* TABLETS (até 1024px) */
@media (max-width: 1024px) {
    .formulario {
        width: 380px;
        padding: 32px;
    }
}

/* MOBILE (até 768px) */
@media (max-width: 768px) {
    body {
        align-items: flex-start; /* Alinha formulário no topo */
        padding: 60px 16px 40px 16px; /* Padding TOPO maior (60px) para não bater no botão */
        overflow-y: auto; /* Permite rolar */
    }

    /* AJUSTE DO BOTÃO NO MOBILE */
    .back-btn {
        top: 15px; /* Bem no topo */
        left: 15px;
        padding: 12px 24px; /* Maior para o dedo */
    }

    .formulario {
        width: 100%;
        max-width: 360px;
        margin-top: 20px; /* Espaço extra do topo */
    }

    .formulario h1 {
        font-size: 24px;
    }
}

/* MOBILE PEQUENO (até 480px) */
@media (max-width: 480px) {
    .caixa-lembrar-esqueci {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}