body {
    margin: 0;
    background: #0a0a0f;
    color: #e0f7ff;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    text-align: center;
    overflow: hidden;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 32px;
    max-width: 520px;
}

.symbol-core {
    width: 140px;
    opacity: 0.9;
    filter: drop-shadow(0 0 20px rgba(224, 247, 255, 0.15));
    margin-bottom: 20px;
}

.logo {
    font-size: 2.5rem;
    letter-spacing: 0.1em;
    margin-top: 0;
}

.system-tagline {
    margin-top: 10px;
    opacity: 0.6;
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.door {
    margin-top: 40px;
    display: inline-block;
    padding: 14px 22px;
    border: 1px solid rgba(224, 247, 255, 0.2);
    border-radius: 8px;
    color: #e0f7ff;
    text-decoration: none;
    font-size: 0.9rem;
    letter-spacing: 0.08em;
    opacity: 0.6;
    transition: all 0.25s ease;
}

.door:hover {
    opacity: 1;
    border-color: rgba(224, 247, 255, 0.6);
    transform: translateY(-2px);
}

.keypad {
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(3, 50px);
    gap: 10px;
    justify-content: center;
    opacity: 0.22;
    transition: opacity 0.3s ease;
}

.keypad:hover {
    opacity: 0.4;
}

.key {
    width: 50px;
    height: 50px;
    border: 1px solid rgba(224, 247, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.02);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(2px);
}

@media (max-width: 600px) {
    .container {
        padding: 24px;
    }

    .symbol-core {
        width: 110px;
    }

    .logo {
        font-size: 2rem;
    }

    .keypad {
        grid-template-columns: repeat(3, 44px);
        gap: 8px;
    }

    .key {
        width: 44px;
        height: 44px;
    }
}