test.css

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    padding: 20px;
    background: #f0f4f8;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.text-container {
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    background: white;
}


:root {
    --cell-size: 50px;
    --state-0: #FFF;
    --state-1: #000;
    --iterations: 0;
}

.turing-machine {
    display: grid;
    grid-template-columns: repeat(3, var(--cell-size));
    gap: 5px;
    position: relative;
    margin: 100px auto;
    width: calc(3 * var(--cell-size) + 10px);
}

/* Tape cells as checkboxes */
.cell {
    width: var(--cell-size);
    height: var(--cell-size);
    border: 2px solid #333;
    appearance: none;
    position: relative;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

/* State representation */
.cell:checked {
    background: var(--state-1);
    transform: rotate(calc(var(--iterations) * 1deg));
}

.cell:not(:checked) {
    background: var(--state-0);
    transform: rotate(calc(var(--iterations) * -1deg));
}

/* Universal transition rule using adjacent sibling combinator */
#cell-1:checked ~ #cell-2,
#cell-2:checked ~ #cell-3,
#cell-4:checked ~ #cell-5,
#cell-5:checked ~ #cell-6,
#cell-7:checked ~ #cell-8,
#cell-8:checked ~ #cell-9 {
    filter: invert(1);
}

/* Infinite loop animation */
@keyframes computation {
    0% { --iterations: 0; }
    100% { --iterations: 360; }
}

body {
    animation: computation 10s infinite linear;
}

/* Hover effects with complex calc() */
.cell:hover {
    transform: 
        scale(1.2)
        translateX(calc(sin(var(--iterations)) * 10px))
        translateY(calc(cos(var(--iterations)) * 10px));
    z-index: 1;
    box-shadow: 0 0 15px rgba(0,0,0,0.3);
}

/* Hidden counter */
#counter {
    counter-reset: computation-step;
}

.cell:checked {
    counter-increment: computation-step;
}

#counter::after {
    content: counter(computation-step);
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2em;
}


.text-container:hover {
    transform: translateY(-5px);
}

.text-container1 {
    background: linear-gradient(145deg, #e3f2fd, #bbdefb);
    border-left: 5px solid #2196f3;
}

.text-container2 {
    background: linear-gradient(145deg, #fbe9e7, #ffccbc);
    border-left: 5px solid #ff5722;
}

.text-container3 {
    background: linear-gradient(145deg, #f1f8e9, #dcedc8);
    border-left: 5px solid #8bc34a;
}

.text-container4 {
    background: linear-gradient(145deg, #fff3e0, #ffe0b2);
    border-left: 5px solid #ff9800;
}

.text-container5 {
    background: linear-gradient(145deg, #ede7f6, #d1c4e9);
    border-left: 5px solid #673ab7;
}

.sub-container {
    margin: 15px 0;
    padding: 15px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 8px;
}

h1, h2, h3 {
    color: #2d3436;
    margin-bottom: 15px;
}

h1 {
    font-size: 2.5em;
    text-align: center;
}

h2 {
    font-size: 1.8em;
    color: #34495e;
}

h3 {
    font-size: 1.4em;
    color: #2c3e50;
}

code {
    display: block;
    padding: 10px;
    margin: 10px 0;
    background: #1e1e1e;
    color: #dcdcdc;
    border-radius: 5px;
    font-family: 'Courier New', Courier, monospace;
}

ul, ol {
    margin-left: 25px;
}

.future-list li {
    padding: 8px;
    margin: 5px 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

.equation-box {
    padding: 20px;
    text-align: center;
    background: #ffffff;
    border-radius: 10px;
    margin: 15px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .text-container {
        padding: 15px;
    }
    
    h1 {
        font-size: 2em;
    }
}