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

body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 100%);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.app-icon {
    width: 180px;
    height: 180px;
    perspective: 1000px;
}

.icon-content {
    width: 100%;
    height: 100%;
    position: relative;
    border-radius: 42px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow:
        0 8px 32px 0 rgba(0, 0, 0, 0.37);
    overflow: hidden;
}

.inner-border {
    position: absolute;
    inset: 0;
    border-radius: 42px;
    padding: 3px;
    background: linear-gradient(
        var(--border-angle, 135deg),
        var(--border-color-1, rgba(147, 197, 253, 0.8)),
        var(--border-color-2, rgba(96, 165, 250, 0.6)),
        var(--border-color-3, rgba(59, 130, 246, 0.4)),
        var(--border-color-2, rgba(96, 165, 250, 0.6)),
        var(--border-color-1, rgba(147, 197, 253, 0.8))
    );
    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    z-index: 5;
    pointer-events: none;
    opacity: var(--border-opacity, 0.9);
    transition: opacity 0.2s ease-out;
    filter: blur(0.5px);
}

.glow-layer {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: radial-gradient(
        circle at var(--glow-x, 50%) var(--glow-y, 50%),
        rgba(147, 197, 253, 0.6) 0%,
        rgba(96, 165, 250, 0.4) 20%,
        rgba(59, 130, 246, 0.2) 40%,
        transparent 70%
    );
    opacity: 0.8;
    transition: opacity 0.3s ease;
    pointer-events: none;
    mix-blend-mode: screen;
}

.glass-layer {
    position: absolute;
    inset: 0;
    border-radius: 42px;
    background: linear-gradient(
        var(--glass-angle, 135deg),
        rgba(255, 255, 255, 0.15) 0%,
        rgba(255, 255, 255, 0.05) 50%,
        rgba(255, 255, 255, 0.1) 100%
    );
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: background 0.2s ease-out;
}

.glass-layer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    border-radius: 42px 42px 0 0;
    background: linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.3) 0%,
        transparent 100%
    );
    opacity: var(--shine-opacity, 0.5);
    transition: opacity 0.2s ease-out;
}

.symbol {
    position: absolute;
    inset: 20%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    filter: drop-shadow(0 2px 10px rgba(0, 0, 0, 0.3))
            drop-shadow(0 0 20px rgba(147, 197, 253, 0.5));
    transition: filter 0.2s ease-out;
}

.info {
    position: absolute;
    bottom: 60px;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    padding: 0 20px;
}

.info p {
    font-size: 14px;
    margin-bottom: 15px;
}

#requestPermission {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 12px 24px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

#requestPermission:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

#requestPermission:active {
    transform: translateY(0);
}

@media (max-width: 480px) {
    .app-icon {
        width: 160px;
        height: 160px;
    }
}