body {
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background: linear-gradient(135deg, #1d1f20, #2d2f30);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    color: white;
}

.bg-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(0,255,0,0.15), transparent);
    filter: blur(120px);
    z-index: 1;
}

.container {
    position: relative;
    z-index: 2;
    background: rgba(0, 0, 0, 0.4);
    padding: 45px;
    border-radius: 18px;
    text-align: center;
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 35px rgba(0, 0, 0, 0.6);
}

.logo {
    max-width: 350px;
    width: 90%;
    margin-bottom: 25px;
}

.title {
    font-size: 2.4rem;
    margin: 0;
    font-weight: 700;
}

.subtitle {
    margin-top: 10px;
    font-size: 1.2rem;
    opacity: 0.85;
}

.loader {
    margin: 30px auto 0;
    width: 55px;
    height: 55px;
    border: 5px solid rgba(255,255,255,0.2);
    border-top-color: #6aff45;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 600px) {
    .title { font-size: 1.8rem; }
    .subtitle { font-size: 1rem; }
    .container { padding: 30px; }
}