* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Inter, sans-serif;
}

@supports (font-variation-settings: normal) {
    :root { font-family: InterVariable, sans-serif; }
}  

body {
    background: url('../landing.jpeg') no-repeat center center fixed;
    background-size: cover;
    padding: 20px;
    color: #fff;
    line-height: 1.6;
}

.step-btn{
    display: none;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(15px);
    position: relative;
}

/* Remove header styles as we don't need them */
header {
    display: none;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #fff;
}

h2 {
    margin-bottom: 15px;
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding-bottom: 10px;
}

h3 {
    margin-bottom: 10px;
    color: #f0f0f0;
}

/* Back button and How to Use button */
.back-button {
    position: absolute;
    top: 20px;
    left: 20px;
    background-color: rgba(0, 224, 255, 0.7);
    color: #000;
    border: none;
    border-radius: 8px;
    padding: 8px 15px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
    z-index: 10;
    text-decoration: none;
}

.back-button:hover {
    box-shadow: 0 5px 15px rgba(0, 224, 255, 0.4);
}

.back-button i {
    font-size: 14px;
}

.how-to-use-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background-color: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.how-to-use-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* Input section styling */
.input-section {
    margin: 50px auto 40px;
    max-width: 800px;
    padding: 20px;
    border-radius: 16px;
    background-color: rgba(61, 79, 97, 0.5);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #d0d0d0;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 12px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.2);
    border-color: #00e0ff;
}

.form-group input[type="number"] {
    width: 120px;
}

/* Fix dropdown styling */
.form-group select {
    appearance: none;
    background: rgba(255, 255, 255, 0.1) url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e") no-repeat right 10px center;
    background-size: 16px;
    padding-right: 30px;
    color: white;
}

.form-group select option {
    background-color: #1e1e1e;
    color: white;
}

/* Button styling */
button {
    padding: 10px 15px;
    background-color: rgba(0, 224, 255, 0.8);
    color: #000;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-right: 10px;
}

button:hover {
    background-color: rgba(0, 224, 255, 1);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 224, 255, 0.4);
}

button:disabled {
    background-color: rgba(204, 204, 204, 0.5);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Simulation container styling */
.simulation-container {
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 30px;
}

.simulation-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.speed-control {
    display: flex;
    align-items: center;
}

.speed-control label {
    margin-right: 10px;
    color: #d0d0d0;
}

/* Reference string display */
.reference-display {
    margin-bottom: 30px;
}

#reference-display {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.ref-item {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    font-weight: bold;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.ref-item.current {
    background-color: rgba(0, 224, 255, 0.3);
    color: white;
    border-color: rgba(0, 224, 255, 0.6);
}

/* Frames container styling */
#frames-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
    max-height: none;
    overflow-y: visible;
    padding-right: 10px;
}

.frame-row {
    display: flex;
    gap: 10px;
}

.frame {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    font-weight: bold;
}

.frame.active {
    background-color: rgba(0, 224, 255, 0.2);
    border-color: rgba(0, 224, 255, 0.4);
}

.frame.new {
    background-color: rgba(15, 157, 88, 0.3);
    border-color: rgba(15, 157, 88, 0.5);
}

.frame.replaced {
    background-color: rgba(219, 68, 55, 0.3);
    border-color: rgba(219, 68, 55, 0.5);
}

/* Statistics styling */
.statistics {
    background-color: rgba(255, 255, 255, 0.08);
    padding: 20px;
    border-radius: 16px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 20px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

/* Frame visualization improvements */
.frame-changes {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.change-indicator {
    font-size: 14px;
    padding: 5px 10px;
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
}

.new-page {
    color: #28a745;
    font-weight: bold;
}

.replaced-page {
    color: #dc3545;
    font-weight: bold;
}

.hit-result {
    background-color: rgba(15, 157, 88, 0.3);
    color: #d4edda;
    padding: 10px;
    border-radius: 8px;
    font-weight: bold;
    border: 1px solid rgba(15, 157, 88, 0.5);
}

.fault-result {
    background-color: rgba(219, 68, 55, 0.3);
    color: #f8d7da;
    padding: 10px;
    border-radius: 8px;
    font-weight: bold;
    border: 1px solid rgba(219, 68, 55, 0.5);
}

.step-divider {
    margin: 20px 0;
    border-top: 1px dashed rgba(255, 255, 255, 0.2);
    padding-top: 10px;
    text-align: center;
    color: #d0d0d0;
    font-size: 14px;
}

/* Table styles */
.simulation-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    font-size: 14px;
}

.simulation-table th, 
.simulation-table td {
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 12px;
    text-align: center;
}

.simulation-table th {
    background-color: rgba(0, 224, 255, 0.2);
    font-weight: bold;
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 10;
}

.simulation-table tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.05);
}

.simulation-table tr:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Page cell styling */
.page-cell {
    font-weight: bold;
    background-color: rgba(0, 224, 255, 0.2);
}

/* Frames cell styling */
.frames-cell {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.frame-in-table {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 36px;
    height: 36px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    font-weight: bold;
}

.empty-frame {
    background-color: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.5);
}

.new-frame {
    background-color: rgba(15, 157, 88, 0.3);
    border-color: rgba(15, 157, 88, 0.5);
    color: #d4edda;
}

.hit-frame {
    background-color: rgba(0, 224, 255, 0.2);
    border-color: rgba(0, 224, 255, 0.4);
    color: #fff;
}

/* Result cell styling */
td.hit-result {
    background-color: rgba(15, 157, 88, 0.3);
    color: #d4edda;
    font-weight: bold;
}

td.fault-result {
    background-color: rgba(219, 68, 55, 0.3);
    color: #f8d7da;
    font-weight: bold;
}

/* Action cell styling */
.action-cell {
    text-align: left;
    font-size: 14px;
}

/* Row highlighting for current step */
.simulation-table tr.current-step {
    background-color: rgba(255, 193, 7, 0.2);
    border-left: 3px solid rgba(255, 193, 7, 0.6);
}

/* Enhanced table styles */
.table-caption {
    margin-bottom: 20px;
    padding: 15px;
    background-color: rgba(255, 255, 255, 0.08);
    border-left: 4px solid rgba(0, 224, 255, 0.8);
    border-radius: 0 8px 8px 0;
    font-size: 14px;
}

.table-caption ul {
    margin-top: 10px;
    margin-left: 20px;
}

.table-caption li {
    margin-bottom: 5px;
}

/* Improved result badges */
.result-badge {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 4px;
    font-weight: bold;
    text-align: center;
    min-width: 60px;
}

td.hit-result .result-badge {
    background-color: rgba(15, 157, 88, 0.6);
    color: white;
}

td.fault-result .result-badge {
    background-color: rgba(219, 68, 55, 0.6);
    color: white;
}

/* Styling for the detailed text */
.detail-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

/* To be replaced frame */
.to-be-replaced {
    background-color: rgba(255, 193, 7, 0.3);
    border-color: rgba(255, 193, 7, 0.5);
    color: #fff3cd;
}

/* Tab styling */
.view-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.tab-button {
    padding: 10px 20px;
    border: 1px solid transparent;
    background-color: transparent;
    color: rgba(255, 255, 255, 0.7);
    border-radius: 8px 8px 0 0;
    margin-right: 5px;
    cursor: pointer;
}

.tab-button:hover {
    border-color: rgba(255, 255, 255, 0.1);
    background-color: rgba(255, 255, 255, 0.05);
}

.tab-button.active {
    color: #fff;
    background-color: rgba(0, 224, 255, 0.1);
    border-color: rgba(0, 224, 255, 0.3);
    border-bottom: 1px solid transparent;
    font-weight: bold;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Step view styling */
#step-details {
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    margin-top: 20px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.step-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.step-result {
    padding: 10px 15px;
    border-radius: 8px;
    font-weight: bold;
}

.frame-comparison {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.comparison-section {
    flex: 1;
}

.comparison-section h5 {
    margin-bottom: 10px;
    color: #d0d0d0;
}

.comparison-frames {
    display: flex;
    gap: 10px;
}

.comparison-arrow {
    font-size: 24px;
    color: rgba(255, 255, 255, 0.6);
}

.comparison-frame {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    font-weight: bold;
}

.step-explanation, .algorithm-state {
    background-color: rgba(255, 255, 255, 0.08);
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid rgba(0, 224, 255, 0.8);
    margin-bottom: 20px;
}

.algorithm-state ul {
    margin-left: 20px;
    margin-top: 10px;
}

/* Complete modal redesign for proper viewport positioning */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100vh;
    border-radius: 10px;
    background-color: rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: none;
    margin : 0;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

body.modal-open {
    overflow: hidden;
}

.modal-content {
    position: relative;
    background-color: rgba(30, 30, 30, 0.938);
    width: 90%;
    max-width: 700px;
    max-height: 85vh;
    border-radius: 16px;
    padding: 30px;
    margin: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    color: #fff;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow-y: auto;
    transform: translateY(0);
    display: flex;
    flex-direction: column;
}

.modal-content h2 {
    position: static;
    color: #00e0ff;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(0, 224, 255, 0.3);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 1002;
    background-color: transparent;
    width: auto;
    height: auto;
    border-radius: 0;
    color: white;
    font-size: 28px;
    font-weight: 300;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

/* Custom scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 224, 255, 0.3);
    border-radius: 10px;
    border: 2px solid rgba(30, 30, 30, 0.8);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 224, 255, 0.5);
}

/* Footer styling */
footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 30px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* Title styling */
.page-title {
    text-align: center;
    margin: 20px 0 40px;
    font-size: 32px;
    color: white;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* Ensure input fields have proper styling */
input, select {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Algorithm section styling */
.modal-section {
    margin-bottom: 30px;
    padding: 0 5px;
}

.modal-section h3 {
    color: #00e0ff;
    margin-bottom: 15px;
    font-size: 20px;
}

.modal-section h4 {
    color: white;
    margin: 20px 0 10px;
    background-color: rgba(0, 224, 255, 0.1);
    padding: 8px 12px;
    border-radius: 6px;
    border-left: 3px solid rgba(0, 224, 255, 0.6);
}

.modal-section p {
    margin-bottom: 15px;
    line-height: 1.6;
}

.modal-section ul, .modal-section ol {
    margin-left: 25px;
    margin-bottom: 15px;
}

.modal-section li {
    margin-bottom: 8px;
    line-height: 1.5;
}

/* Add visual dividers between sections */
.modal-section:not(:last-child) {
    border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
    padding-bottom: 25px;
}

/* Algorithm advantages/disadvantages */
.modal-section ul li strong {
    color: #00e0ff;
}

/* Numbered steps in how-to-use section */
.modal-section ol {
    counter-reset: step-counter;
    list-style-type: none;
    margin-left: 5px;
}

.modal-section ol li {
    counter-increment: step-counter;
    position: relative;
    padding-left: 35px;
    margin-bottom: 15px;
}

.modal-section ol li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: -2px;
    width: 25px;
    height: 25px;
    background-color: rgba(0, 224, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
}

/* Understanding results section */
.modal-section p strong {
    color: #00e0ff;
    font-weight: 600;
}

/* Theory Section Styling */
.theory-section {
    background-color: #ffffff;
    border-radius: 15px;
    padding: 2.5rem;
    margin: 2rem 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.theory-section h2 {
    color: #1a237e;
    font-size: 2.2rem;
    margin-bottom: 1.8rem;
    border-bottom: 3px solid #3f51b5;
    padding-bottom: 0.8rem;
}

.theory-section h3 {
    color: #283593;
    font-size: 1.8rem;
    margin: 2rem 0 1.2rem 0;
}

.theory-section h4 {
    color: #303f9f;
    font-size: 1.4rem;
    margin: 1.5rem 0 1rem 0;
}

.theory-section p {
    font-size: 1.15rem;
    line-height: 1.7;
    color: #333;
    margin-bottom: 1.5rem;
}

.theory-section ul {
    padding-left: 2.5rem;
    margin: 1.2rem 0;
}

.theory-section li {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1rem;
    color: #37474f;
    position: relative;
}

.theory-section strong {
    color: #1565c0;
    font-weight: 600;
}

/* Key concepts section */
.theory-section ul li strong {
    display: inline-block;
    min-width: 150px;
}

/* Performance metrics styling */
.theory-section ul li:has(strong) {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    padding: 0.5rem 0;
}

/* Memory access patterns styling */
.theory-section h3:last-of-type + ul li {
    background-color: #f5f5f5;
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    margin-bottom: 0.8rem;
}

/* Hover effects */
.theory-section li:hover {
    background-color: #f3f6f9;
    transform: translateX(8px);
    transition: all 0.3s ease;
    border-radius: 6px;
}

/* Algorithm details section */
.theory-section h4 + p {
    background-color: #e8eaf6;
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
}