/* Error-Correcting Codes Simulator Styles */
/* Constraint Theory Research Project */

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --border-color: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #adb5bd;
    --text-muted: #6c757d;
    --accent-blue: #4a9eff;
    --accent-green: #51cf66;
    --accent-red: #ff6b6b;
    --accent-yellow: #ffd43b;
    --shadow: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

header h1 {
    font-size: 2.5rem;
    color: var(--accent-blue);
    margin-bottom: 10px;
    text-shadow: 0 2px 4px var(--shadow);
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* Controls */
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 150px;
}

.control-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.control-group input[type="text"],
.control-group select {
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.control-group input[type="text"]:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.control-group input[type="range"] {
    width: 100%;
    cursor: pointer;
}

.control-group button {
    padding: 10px 16px;
    background: var(--accent-blue);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.control-group button:hover {
    background: #3a8eef;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px var(--shadow);
}

.control-group button:active {
    transform: translateY(0);
}

.step-btn {
    background: var(--accent-green) !important;
}

.step-btn:hover {
    background: #4ab857 !important;
}

/* Stats Bar */
.stats-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
    padding: 15px 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-blue);
    font-family: 'Courier New', monospace;
}

/* Visualization Container */
.visualization-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.viz-panel {
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 20px;
    box-shadow: 0 4px 12px var(--shadow);
}

.viz-panel h3 {
    color: var(--accent-blue);
    margin-bottom: 15px;
    font-size: 1.2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

/* Canvas */
canvas {
    width: 100%;
    height: auto;
    background: var(--bg-tertiary);
    border-radius: 6px;
    margin-bottom: 15px;
}

/* Legend */
.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 10px;
    padding: 10px;
    background: var(--bg-tertiary);
    border-radius: 6px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid var(--text-secondary);
}

.legend-color.valid {
    background: var(--accent-green);
}

.legend-color.invalid {
    background: var(--bg-tertiary);
}

.legend-color.received {
    background: var(--accent-yellow);
}

.legend-color.corrected {
    background: var(--accent-blue);
}

/* Bits Display */
.bits-display {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 15px;
}

.bit-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.group-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bits {
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
    color: var(--text-primary);
    letter-spacing: 4px;
    padding: 10px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.bits.code-word {
    color: var(--accent-blue);
    font-weight: 700;
    font-size: 1.3rem;
}

.bits.syndrome {
    color: var(--accent-red);
}

.bits.corrected {
    color: var(--accent-green);
}

.bits.decoded {
    color: var(--accent-yellow);
    font-weight: 700;
}

.position {
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    color: var(--accent-yellow);
    padding: 10px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-weight: 700;
}

/* Explanation */
.explanation {
    margin-top: 15px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-left: 4px solid var(--accent-blue);
    border-radius: 6px;
    font-size: 0.9rem;
    line-height: 1.6;
}

.explanation strong {
    color: var(--accent-blue);
}

/* Info Panel */
.info-panel {
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 20px;
    margin-bottom: 20px;
}

.info-panel h3 {
    color: var(--accent-blue);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.info-content {
    display: grid;
    gap: 20px;
}

.info-section {
    padding: 15px;
    background: var(--bg-tertiary);
    border-radius: 6px;
}

.info-section h4 {
    color: var(--accent-green);
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.info-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 10px;
}

.info-section ul {
    list-style: none;
    padding-left: 0;
}

.info-section li {
    color: var(--text-secondary);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.info-section li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent-blue);
    font-weight: bold;
}

.info-section li strong {
    color: var(--accent-yellow);
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .controls {
        flex-direction: column;
    }

    .control-group {
        min-width: 100%;
    }

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }

    .visualization-container {
        grid-template-columns: 1fr;
    }

    .viz-panel {
        padding: 15px;
    }

    .bits {
        font-size: 1rem;
        letter-spacing: 2px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

    .stat-value {
        font-size: 1.2rem;
    }

    .legend {
        flex-direction: column;
    }
}

/* Animations */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes slideIn {
    from {
        transform: translateY(-10px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.viz-panel {
    animation: slideIn 0.3s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Selection */
::selection {
    background: var(--accent-blue);
    color: white;
}

/* Focus Styles */
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: 1rem;
}

.mb-2 {
    margin-bottom: 1rem;
}