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HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Kawaii Black Cat</title>
    <style>
        body {
            margin: 0;
            min-height: 100vh;
            overflow: hidden;
            display: grid;
            place-items: center;
            background: linear-gradient(135deg, #fec, #f9d5bb);
            font-family: 'Comic Sans MS', cursive, sans-serif;
            transition: background 1s ease;
        }

article {
            --fur: #222;
            --fur-dark: #111;
            --skin: #ffb6c1;
            --eye-color: #4b0082;
            --paw-color: #fff;
            font-size: 0.6vmin;
            width: 80em;
            aspect-ratio: 1;
            position: relative;
            filter: drop-shadow(0 10px 15px rgba(0,0,0,0.1));
            animation: float 3s ease-in-out infinite;
            
            *, *::before, *::after {
                position: absolute;
                box-sizing: border-box;
                transition: all 0.3s ease;
            }
            
            #alt {
                position: absolute;
                width: 1px;
                height: 1px;
                padding: 0;
                margin: -1px;
                overflow: hidden;
                clip: rect(0, 0, 0, 0);
                white-space: nowrap;
                border: 0;
            }
            
            .shadow {
                width: 80%;
                height: 5%;
                background: rgba(0,0,0,0.1);
                border-radius: 50% / 0 0 100% 100%;
                top: 99%;
                left: 50%;
                transform: translateX(-50%);
                filter: blur(2px);
                animation: shadow-pulse 3s ease-in-out infinite;
            }
        
            .tail {
                width: 50%;
                height: 50%;
                border-radius: 50%;
                border: 7em solid transparent;
                border-top-color: var(--fur-dark);
                border-left-color: var(--fur-dark);
                clip-path: polygon(100% 0, 100% 100%, 0 30%, 0 0);
                top: 75%;
                left: 52%;
                transform-origin: left center;
                animation: tail-wag 5s ease-in-out infinite;
                
                &::before {
                    content: "";
                    width: 7em;
                    aspect-ratio: 1;
                    background: var(--fur-dark);
                    border-radius: 50%;
                    left: 81%;
                    top: -9%;
                }
            }
            
            .body {
                left: 50%;
                transform: translateX(-50%);
                bottom: 0;
                width: 35%;
                height: 40%;
                background: 
                    radial-gradient(100% 80% at 50% 0, var(--fur-dark) 50%, transparent 0),
                    var(--fur);
                border-radius: 100% / 200% 200% 20% 20%;
                animation: body-breathe 3s ease-in-out infinite;
                
                .leg {
                    width: 165%;
                    height:38%;
                    background: var(--fur);
                    bottom: 0;
                    left:50%;
                    transform: translateX(-50%) scaleY(-1);
                    border-radius: 8em 8em 100% 100% / 10em 10em 16em 16em;
                }
                
                .paw {
                    width: 35%;
                    height: 49%;
                    border: 0.75em solid var(--paw-color);
                    border-top: 0;
                    border-radius: 0 0 5em 5em;
                    border-bottom: 1em solid var(--paw-color);
                    top: 48%;
                    transform: rotate(-10deg);
                    left: 10%;
                    clip-path: polygon(0 20%, 100% 30%, 100% 100%, 0 100%);
                    
                    & + & {
                        right: 7%;
                        height: 50%;
                        left: auto;
                        transform: rotate(13deg) scaleX(-1);
                        clip-path: polygon(0 25%, 100% 15%, 100% 100%, 0 100%);
                    }
                }
            }
            
            .ear {
                width: 40%;
                aspect-ratio: 1;
                border: 4em solid var(--fur);
                border-radius: 5% 90% 10% 80%;
                background: var(--skin);
                animation: ear-twitch 8s ease-in-out infinite;
                
                & + & {
                    transform: scaleX(-1);
                    right: 0;
                    animation-delay: 0.5s;
                }
                
                &::before {
                    content: "";
                    position: absolute;
                    width: 50%;
                    height: 50%;
                    background: var(--skin);
                    border-radius: 50%;
                    top: 15%;
                    left: 15%;
                }
            }
            
            .head {
                width: 80%;
                aspect-ratio: 1.1;
                background: 
                    linear-gradient(rgba(0,0,0,0.3), transparent 50%),
                    var(--fur);
                left: 50%;
                transform: translateX(-50%);
                border-radius: 100% / 125% 125% 80% 75%;
                animation: head-tilt 10s ease-in-out infinite;
                
                .whisker {
                    width: 30%;
                    height: 30%;
                    border-radius: 50%;
                    border: 2em solid transparent;
                    border-top-color: var(--fur);
                    border-left-color: var(--fur);
                    clip-path: polygon(100% 0, 100% 100%, 0 30%, 0 0);
                    
                    &:nth-child(1) {
                        top: 70%;
                        transform: translateX(-65%);
                    }
                    &:nth-child(2) {
                        top: 80%;
                        transform: translateX(-40%) rotate(-20deg);
                    }
                    
                    &:nth-child(3) {
                        right: 0%;
                        top: 70%;
                        transform: translateX(65%) rotate(10deg);
                    }
                    &:nth-child(4) {
                        right: 0;
                        top: 80%;
                        transform: translateX(40%) rotate(24deg);
                    }
                }
                
                .nose {
                    width: 10%;
                    height: 7%;
                    background: var(--skin);
                    border-radius: 50%;
                    top: 78%;
                    left: 50%;
                    transform: translate(-50%, -50%);
                    
                    &::before {
                        content: "";
                        position: absolute;
                        width: 120%;
                        height: 50%;
                        background: var(--skin);
                        top: 80%;
                        left: 50%;
                        transform: translateX(-50%);
                        clip-path: polygon(0 0, 100% 0, 50% 100%);
                    }
                }
                
                .eye {
                    --pos: 25%;
                    --x1: 50%;
                    --x2: 42%;
                    width: 35%;
                    aspect-ratio: 1;
                    border-radius: 50%;
                    background: 
                        radial-gradient(50% 50% at var(--x1) 47%, #fff 25%, transparent 0),
                        radial-gradient(50% 50% at var(--x2) 65%, #fff 12%, transparent 0),
                        radial-gradient(circle at 60% 55%, var(--eye-color) 35%, transparent 0),
                        white;
                    top: 63%;
                    left: var(--pos);
                    transform: translate(-50%, -50%);
                    animation: blink 5s infinite;
                    
                    & + & {
                        --x1: 70%;
                        --x2: 78%;
                        left: calc(100% - var(--pos));
                        transform: translate(-50%, -50%) scaleX(-1);
                    }
                }
            }
            
            &:hover {
                .eye {
                    animation: squint 0.5s ease-in-out;
                }
                
                .tail {
                    animation: tail-wag-fast 0.5s ease-in-out infinite;
                }
            }
        }

/* Animations */
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-20px); }
        }

@keyframes shadow-pulse {
            0%, 100% { transform: translateX(-50%) scale(1); opacity: 0.1; }
            50% { transform: translateX(-50%) scale(0.9); opacity: 0.2; }
        }

@keyframes tail-wag {
            0%, 100% { transform: rotate(0deg); }
            25% { transform: rotate(5deg); }
            75% { transform: rotate(-5deg); }
        }

@keyframes tail-wag-fast {
            0%, 100% { transform: rotate(0deg); }
            50% { transform: rotate(10deg); }
        }

@keyframes body-breathe {
            0%, 100% { transform: translateX(-50%); }
            50% { transform: translateX(-50%) scaleY(1.02); }
        }

@keyframes ear-twitch {
            0%, 96%, 100% { transform: rotate(0deg); }
            98% { transform: rotate(-10deg); }
        }

@keyframes head-tilt {
            0%, 100% { transform: translateX(-50%) rotate(0deg); }
            25% { transform: translateX(-50%) rotate(2deg); }
            75% { transform: translateX(-50%) rotate(-2deg); }
        }

@keyframes blink {
            0%, 48%, 52%, 100% { height: 35%; }
            50% { height: 5%; }
        }

@keyframes squint {
            0%, 100% { height: 35%; }
            50% { height: 25%; }
        }

/* YouTube Link */
        #youtube {
            z-index: 2;
            display: block;
            width: 100px;
            height: 70px;
            position: absolute;
            bottom: 20px;
            right: 20px;
            background: red;
            border-radius: 50% / 11%;
            transition: transform 0.5s;
            overflow: hidden;
            text-decoration: none;
        }

#youtube:hover,
        #youtube:focus {
            transform: scale(1.1);
            animation: pulse 1s infinite;
        }

#youtube::before {
            content: "";
            display: block;
            position: absolute;
            top: 7.5%;
            left: -6%;
            width: 112%;
            height: 85%;
            background: red;
            border-radius: 9% / 50%;
        }

#youtube::after {
            content: "";
            display: block;
            position: absolute;
            top: 20px;
            left: 40px;
            width: 45px;
            height: 30px;
            border: 15px solid transparent;
            box-sizing: border-box;
            border-left: 30px solid white;
        }

#youtube span {
            position: absolute;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 12px;
            font-weight: bold;
            text-align: center;
            padding: 0 10px;
            box-sizing: border-box;
        }

@keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(255, 0, 0, 0.7); }
            70% { box-shadow: 0 0 0 10px rgba(255, 0, 0, 0); }
            100% { box-shadow: 0 0 0 0 rgba(255, 0, 0, 0); }
        }

/* Responsive adjustments */
        @media (max-width: 768px) {
            article {
                width: 60vmin;
            }
            
            #youtube {
                width: 80px;
                height: 56px;
                bottom: 10px;
                right: 10px;
            }
            
            #youtube::after {
                top: 16px;
                left: 32px;
                width: 36px;
                height: 24px;
                border: 12px solid transparent;
                border-left: 24px solid white;
            }
        }
    </style>
</head>
<body>
    <article role="img" aria-labelledby="alt">
        <div id="alt">Cartoon of a black cat drawn in cute/kawaii style with animated tail and blinking eyes</div>
        <div class="shadow"></div>
        <div class="tail"></div>
        <div class="body">
            <div class="leg"></div>
            <div class="leg"></div>
            <div class="paw"></div>
            <div class="paw"></div>
        </div>
        <div class="ear"></div>
        <div class="ear"></div>
        <div class="head">
            <div class="whisker"></div>
            <div class="whisker"></div>
            <div class="whisker"></div>
            <div class="whisker"></div>
            <div class="eye"></div>
            <div class="eye"></div>
            <div class="nose"></div>
        </div>
    </article>

<a id="youtube" href="https://www.youtube.com/@yulismayagmur" target="_blank" aria-label="Watch how this component was coded">
        <span>Watch Tutorial</span>
    </a>
</body>
</html>

CSS