/* --- 1. Base Layout & Wrapper --- */
body, html {
    margin: 0;
    padding: 0;
    background: #000;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    font-family: 'Quicksand', sans-serif;
}
body { animation: fadeInPage 0.5s ease-in-out forwards; }
@keyframes fadeInPage { from { opacity: 0; } to { opacity: 1; } }

#canvas-wrapper {
    position: relative;
    max-width: 97vw;
    max-height: 97vh;
    box-shadow: 0 0 30px rgba(0,0,0,0.7);
}

#rippleCanvas {
    display: block;
    max-width: 100%;
    max-height: 100%;
}

.main-title {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    margin: 0;
    font-weight: 300;
    font-size: 3.5vw;
    color: #000;
    letter-spacing: 1px;
    z-index: 20;
    pointer-events: none;
    filter: drop-shadow(0 0 10px rgba(0, 0, 0, 0.7));
}

/* --- 2. Interactive Navigation Items --- */
.nav-item {
    position: absolute;
    z-index: 10;
    white-space: nowrap;
    aspect-ratio: 1/1;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    pointer-events: none; /* Passthrough to inner elements */
    color: #000;
    font-weight: 400;
    font-size: 2.2vw;
    filter: drop-shadow(0 0 2px #fff) drop-shadow(0 0 10px #fff) drop-shadow(0 0 20px rgba(255,255,255,0.8));
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), 
                color 0.3s ease, filter 0.3s ease, opacity 0.5s ease;
    opacity: 1;
}

.nav-item a, 
.nav-item span {
    pointer-events: auto;
    cursor: pointer;
    display: inline-block;
    width: 100%;
    padding: 15px 20px;
    text-decoration: none;
    color: inherit;
}

.nav-item:hover {
    color: #FF0000;
    transform: translate(-50%, -50%) scale(1.15) !important;
    transition: 0.9s;
    filter: drop-shadow(0 8px 15px rgba(0, 0, 0, 0.6));
}

/* Position Mapping */
#btn-download  { top: 38%; left: 25%; transform: translate(-50%, -50%); }
#btn-demo      { top: 38%; left: 75%; transform: translate(-50%, -50%); }
#btn-community { top: 73%; left: 36%; transform: translate(-50%, -50%); }
#btn-about     { top: 73%; left: 64%; transform: translate(-50%, -50%); }

/* --- 3. Center Icon & Demo Visuals --- */
.center-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    
    width: 20vmin; 
    
    min-width: 80px; 
    max-width: 200px; 
    
    border-radius: 12px;
    overflow: hidden;
    z-index: 25;
    pointer-events: none;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 1));
    
    transition: opacity 0.5s ease, filter 0.3s ease;
    opacity: 1;
}

@keyframes fadeInIcon {
    from { opacity: 0; transform: translate(-50%, -45%); }
    to { opacity: 1; transform: translate(-50%, -50%); }
}

/* --- 4. Transition & Utility States --- */
.nav-item.faded, 
.center-icon.faded {
    opacity: 0 !important;
    pointer-events: none;
}

/* --- 5. Footer --- */
.footer-container {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    z-index: 30;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'Quicksand', sans-serif;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: #888;
    text-shadow: 0 0 12px rgba(255, 255, 255, 0.9), 
                 0 0 18px rgba(255, 255, 255, 0.5);
}

.footer-right a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.3s ease, color 0.3s ease;
}

.footer-right a:hover {
    color: red;
}

.footer-left {
    opacity: 0.8;
}

.separator {
    margin: 0 10px;
    opacity: 0.5;
}