* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #10172a url('/assets/images/background.png') center center / cover no-repeat fixed;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: #2d2d2d;
}

.corner-icon {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1000;
    width: 156px;
    height: 156px;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    backdrop-filter: none;
}

.corner-icon img {
    width: 108px;
    height: 108px;
    object-fit: contain;
}

body.modal-locked {
    overflow: hidden;
}

.container {
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25), 0 4px 16px rgba(0, 0, 0, 0.1);
    max-width: 560px;
    width: 100%;
    overflow: hidden;
}

@media (max-width: 640px) {
    .corner-icon {
        top: 10px;
        left: 10px;
        width: 138px;
        height: 138px;
        border-radius: 0;
    }

    .corner-icon img {
        width: 90px;
        height: 90px;
    }

    body {
        background-position: 55% center;
    }
}