:root {
    --bg-color: #0d0d0d;
    --text-color: #e0e0e0;
    --accent-color: #ffffff;
    --accent-dark: #666666;
    --surface-color: rgba(20, 20, 20, 0.85);
    --border-color: rgba(255, 255, 255, 0.15);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
}

.main-header {
    text-align: center;
    position: absolute;
    top: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    width: 100%;
}

h1 {
    font-size: 4rem;
    font-weight: 900;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 4px;
    margin-bottom: 0.5rem;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
}

.full-cat-image {
    width: 100%;
    height: 100vh;
    display: block;
    filter: grayscale(100%) contrast(1.1);
    object-fit: cover;
    object-position: center center;
}

/* Fixed Bottom Container */
.fixed-bottom {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    z-index: 20;
    display: flex;
    justify-content: center;
    padding: 0 1rem;
}

.ca-text-only {
    font-family: monospace;
    font-size: 1.6rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.85);
    cursor: pointer;
    transition: color 0.3s ease, transform 0.2s ease, text-shadow 0.3s ease;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.9);
    word-break: break-all;
    text-align: center;
    position: relative;
    padding: 0.5rem;
}

.ca-text-only:hover {
    color: rgba(255, 255, 255, 1);
    transform: scale(1.02);
    text-shadow: 0 2px 15px rgba(255, 255, 255, 0.5);
}

.copy-feedback {
    font-size: 0.8rem;
    font-weight: 600;
    color: #000;
    background-color: var(--accent-color);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    position: absolute;
    bottom: -35px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    pointer-events: none;
}

.copy-feedback.show {
    opacity: 1;
    transform: translateY(0);
}

@keyframes slowPulse {
    0% { opacity: 0; }
    100% { opacity: 0.65; }
}

.pulse-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: #000;
    pointer-events: none;
    mask-image: radial-gradient(ellipse at center, transparent 35%, black 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, transparent 35%, black 75%);
    animation: slowPulse 6s infinite alternate cubic-bezier(0.33, 1, 0.68, 1);
    z-index: 5;
}

@media (max-width: 600px) {
    h1 {
        font-size: 3rem;
    }
    
    .fixed-bottom {
        bottom: 1rem;
    }

    .ca-text-only {
        font-size: 1.1rem;
    }
}