@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');

:root {
    --verde-led: #2eb82e;      /* Um verde mais elegante para fundo branco */
    --castanho-texto: #3e2723; /* Castanho para os títulos e labels */
    --branco-puro: #ffffff;
}

body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Poppins', sans-serif;
    /* FUNDO BRANCO LIMPO */
    background-color: var(--branco-puro);
}

.main-content {
    position: relative;
    width: 380px;
    height: 480px;
    background: #f0f0f0; /* Cinza clarinho por trás do LED */
    border-radius: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    /* Sombra suave para o painel não flutuar no vazio */
    box-shadow: 0 20px 50px rgba(0,0,0,0.08);
}

/* O LED Verde (ajustado para fundo claro) */
.main-content::before {
    content: '';
    position: absolute;
    width: 150%;
    height: 150%;
    background: conic-gradient(transparent, transparent, transparent, var(--verde-led));
    animation: rotateLED 3s linear infinite;
}

@keyframes rotateLED {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* O Cartão (Versão Light Glass) */
.login-card {
    position: absolute;
    inset: 4px; /* Espessura do LED */
    background: rgba(255, 255, 255, 0.9); /* Branco quase sólido */
    border-radius: 16px;
    z-index: 10;
    padding: 50px 40px;
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(10px);
}

h2 {
    color: var(--castanho-texto);
    text-align: center;
    margin-bottom: 30px;
    font-weight: 600;
}

label {
    color: #666;
    font-size: 0.85rem;
    margin-bottom: 5px;
    font-weight: 600;
    display: block;
}

input {
    width: 100%;
    padding: 12px;
    background: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 8px;
    color: #333;
    margin-bottom: 20px;
    outline: none;
    box-sizing: border-box;
    transition: 0.3s;
}

input:focus {
    border-color: var(--verde-led);
    background: #fff;
    box-shadow: 0 0 8px rgba(46, 184, 46, 0.2);
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background-color: var(--verde-led);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary:hover {
    background-color: var(--castanho-texto); /* Muda para castanho ao passar o rato */
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}