/* ==========================================
   Optical Illusion — Ultra Clean UI
   ========================================== */

body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #000000;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    user-select: none;
    -webkit-user-select: none;
}

canvas {
    display: block;
    width: 100vw;
    height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

/* ==========================================
   Background Overlay (Dim + Blur)
   ========================================== */

#bg-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0);
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    pointer-events: none;
    z-index: 5;
    transition: background 0.8s ease, backdrop-filter 0.8s ease;
}

#bg-overlay.active {
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    pointer-events: auto;
}

/* ==========================================
   UI Container & Card Panel
   ========================================== */

#ui-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    z-index: 10;
    perspective: 1500px;
}

#card {
    width: 380px;
    max-width: 90vw;
    background: rgba(18, 18, 18, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    overflow: hidden;
    box-shadow:
        0 40px 80px rgba(0, 0, 0, 0.9),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
    color: #ffffff;
    opacity: 0;
    pointer-events: auto;
    transform: rotateX(15deg) translateY(50px) scale(0.95);
    transform-origin: center bottom;
}

/* ==========================================
   Card Image
   ========================================== */

.card-img {
    width: 100%;
    height: 220px;
    position: relative;
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(40%) contrast(120%);
}

.card-img::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to top, rgba(18, 18, 18, 1) 0%, transparent 100%);
}

/* ==========================================
   Card Content
   ========================================== */

.content {
    padding: 30px;
    position: relative;
}

.tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: #d0d0d0;
    margin-bottom: 14px;
}

.content h2 {
    margin: 0 0 12px 0;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.content p {
    margin: 0;
    font-size: 14px;
    line-height: 1.6;
    color: #a0a0a0;
    font-weight: 300;
}

/* ==========================================
   Close Button
   ========================================== */

#close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 34px;
    height: 34px;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

#close-btn:hover {
    background: #ffffff;
    color: #000000;
    transform: scale(1.1) rotate(90deg);
}

#close-btn svg {
    width: 16px;
    height: 16px;
}

/* ==========================================
   Responsive
   ========================================== */

@media (max-width: 768px) {
    #ui-container {
        justify-content: center;
        padding-right: 0;
    }
}