:root[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --primary-color: #0672EA;
    --secondary-color: #4a4a4a;
    --error-color: #ff6b6b;
    --warning-color: #ffb74d;
    --success-color: #66bb6a;
    --border-color: #333333;
    --input-bg: #1f1f1f;
    --button-hover: #3a3a3a;
    --text-muted: #b8b7b7;
    --card-bg: #2d2d2d;
    --card-border: #404040;
}

:root[data-theme="light"] {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --primary-color: #0672EA;
    --secondary-color: #e0e0e0;
    --error-color: #d32f2f;
    --warning-color: #f57c00;
    --success-color: #2e7d32;
    --border-color: #dddddd;
    --input-bg: #f5f5f5;
    --button-hover: #e8e8e8;
    --text-muted: #666666;
    --card-bg: #ffffff;
    --card-border: #e0e0e0;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    transition: background-color 0.3s, color 0.3s;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navbar */
.navbar {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.nav-logo {
    width: 32px;
    height: 32px;
    margin-right: 0.5rem;
}

.light-logo {
    display: none;
}

.dark-logo {
    display: block;
}

[data-theme="light"] .light-logo {
    display: block;
}

[data-theme="light"] .dark-logo {
    display: none;
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links-group {
    display: flex;
    gap: 1rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-links a:hover {
    background-color: var(--button-hover);
    text-decoration: none;
}

.nav-links a.active {
    background-color: var(--primary-color);
    color: white;
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 1rem;
    border-radius: 50%;
    transition: background-color 0.3s;
}

.theme-toggle:hover {
    background-color: var(--button-hover);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="light"] .sun-icon {
    display: block;
}

[data-theme="light"] .moon-icon {
    display: none;
}

/* Content Container */
.content-container {
    margin-top: 80px;
    flex: 1;
    padding: 1.5rem 0.75rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 2rem;
}

code {
    background-color: var(--secondary-color);
    border: none;
    padding: 0.07rem 0.2rem;
    border-radius: 4px;
}

a {
    color: var(--primary-color);
    text-decoration: underline;
}

a:hover {
    text-decoration: none;
}

a:visited {
    color: var(--primary-color);
}

a:active {
    text-decoration: none;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(0deg, #ff00cc, #0011ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* Evolution Section */
.evolution-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}



/* Controls Section */
.controls-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.control-group {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 1.25rem;
}

.control-group h3 {
    margin-bottom: 0.75rem;
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: 600;
}

/* Radio Group */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background-color 0.2s;
    cursor: pointer;
}

.radio-item:hover {
    background-color: var(--button-hover);
}

.radio-item input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    appearance: none;
    -webkit-appearance: none;
    border-radius: 50%;
    position: relative;
    cursor: pointer;
}

.radio-item input[type="radio"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.radio-item input[type="radio"]:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 6px;
    height: 6px;
    background-color: white;
    border-radius: 50%;
}

.radio-item label {
    cursor: pointer;
    font-weight: 500;
    color: var(--text-color);
}

/* Checkbox Item */
.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background-color 0.2s;
    cursor: pointer;
    margin-top: 0.75rem;
}

.checkbox-item:hover {
    background-color: var(--button-hover);
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    appearance: none;
    -webkit-appearance: none;
    border-radius: 3px;
    position: relative;
    cursor: pointer;
}

.checkbox-item input[type="checkbox"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-item input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 14px;
    font-weight: 700;
    font-family: 'system-ui';
    line-height: 1;
}

.checkbox-item label {
    cursor: pointer;
    font-weight: 500;
    color: var(--text-color);
}

/* Slider Group */
.slider-group {
    margin-top: 1rem;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.slider-group:hover {
    background-color: var(--button-hover);
}

.slider-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.slider-group input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.slider-group input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.slider-group input[type="range"]:hover::-webkit-slider-thumb {
    background: #0d5bb8;
    transform: scale(1.1);
}

.slider-group input[type="range"]:hover::-moz-range-thumb {
    background: #0d5bb8;
    transform: scale(1.1);
}

/* Button Group */
.button-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.primary-button, .secondary-button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.primary-button {
    background-color: var(--primary-color);
    color: white;
}

.primary-button:hover:not(:disabled) {
    background-color: #0d5bb8;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(22, 120, 223, 0.3);
}

.primary-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

#reset-learning-rate-button {
    padding: 0.3rem 0.3rem;
    border-radius: 50%;
    color: red;
    background-color: var(--card-bg);
}

.secondary-button {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.secondary-button:hover:not(:disabled) {
    background-color: var(--button-hover);
    transform: translateY(-2px);
}

.secondary-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner.hidden {
    display: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Stats Section */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.stat-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.25rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

/* Loading Section */
.loading-section {
    text-align: center;
    padding: 2rem;
    margin-bottom: 1rem;
    background-color: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
}

.loading-section.hidden {
    display: none;
}

.loading-section .spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto 1rem;
}

.loading-section p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin: 0;
}

/* Sequences Section */
.sequences-section {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.sequences-section h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
    font-size: 1.2rem;
    font-weight: 600;
}

.sequences-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 0.75rem;
}

.sequence-card {
    background-color: var(--input-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    padding: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.sequence-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 115, 230, 0.2);
}

.sequence-card.selected {
    border-color: var(--success-color);
    background-color: rgba(102, 187, 106, 0.1);
}

.sequence-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: var(--text-color);
    word-break: break-word;
    text-align: center;
    line-height: 1;
}

/* Share Section */
.share-section {
    padding: 1.25rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.share-section .control-group {
    margin-bottom: 0;
    padding: 0;
}

.share-section h3 {
    margin-bottom: 0.75rem;
    color: var(--text-color);
    font-size: 1.1rem;
}

.share-section .button-group {
    justify-content: center;
}

.share-section .help-text {
    margin-top: 0.5rem;
    font-size: 0.85rem;
}



/* Responsive Design */
@media (max-width: 768px) {
    .nav-content {
        padding: 0.5rem;
    }
    
    .nav-brand {
        font-size: 1rem;
    }
    
    .nav-logo {
        width: 24px;
        height: 24px;
    }
    
    .content-container {
        margin-top: 70px;
        padding: 1rem 0.5rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .controls-section {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stats-section {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sequences-grid {
        grid-template-columns: 1fr;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .button-group button {
        width: 100%;
        justify-content: center;
    }
    .checkpoint-message {
        padding: 0 0 0 0 !important;
        margin-top: 0.8rem !important;
    }
}

/* Focus Styles */
button:focus,
input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

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

/* Notification System */
.notification-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.notification {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 12px 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 500;
    max-width: 300px;
    word-wrap: break-word;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease;
    pointer-events: auto;
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification.success {
    border-left: 4px solid var(--success-color);
    background-color: rgba(102, 187, 106, 0.2);
}

.notification.error {
    border-left: 4px solid var(--error-color);
    background-color: rgba(255, 107, 107, 0.2);
}

.notification.warning {
    border-left: 4px solid var(--warning-color);
    background-color: rgba(255, 183, 77, 0.2);
}

.notification.info {
    border-left: 4px solid var(--primary-color);
    background-color: rgba(0, 115, 230, 0.2);
}

.notification:hover {
    transform: translateX(-5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

/* Mobile responsive notifications */
@media (max-width: 768px) {
    .notification-container {
        bottom: 10px;
        right: 10px;
        left: 10px;
    }
    
    .notification {
        max-width: none;
        font-size: 0.85rem;
    }
}

/* Wow button styles */
.wow-button {
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
    border: none;
    color: white;
    font-weight: bold;
    transition: all 0.3s ease;
}

.wow-button:hover {
    background: linear-gradient(135deg, #ff5252, #ff8c00);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
}

.wow-button:disabled {
    background: linear-gradient(135deg, #ccc, #999);
    transform: none;
    box-shadow: none;
    cursor: not-allowed;
}

.wow-button i {
    margin-right: 0.5rem;
}

.help-text {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.375rem;
    text-align: center;
}

/* Checkpoint Selection UI */
.checkpoint-selection {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.checkpoint-selection-content {
    width: 100%;
    max-width: 800px;
    text-align: center;
}

.checkpoint-selection-content h2 {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.checkpoint-intro {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.checkpoint-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.checkpoint-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.25rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.checkpoint-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.checkpoint-score {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--success-color);
    margin-bottom: 0.375rem;
}

.checkpoint-date {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.checkpoint-load-btn {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.checkpoint-load-btn:hover:not(:disabled) {
    background: #0d5bb8;
}

.checkpoint-load-btn:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
}

.checkpoint-actions {
    margin-top: 1.5rem;
}

.checkpoint-actions .primary-button {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 500;
}

/* Responsive design for checkpoint selection */
@media (max-width: 768px) {
    .checkpoint-selection {
        padding: 0.75rem;
    }
    
    .checkpoint-selection-content h2 {
        font-size: 2rem;
    }
    
    .checkpoint-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .checkpoint-card {
        padding: 0.875rem;
    }
} 

/* Checkpoint Message */
.checkpoint-message {
    padding: 0.25rem;
    text-align: center;
    margin-top: -2.7rem;
}

.checkpoint-message-content p {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-color);
    line-height: 1.6;
}

.checkpoint-message-content a {
    text-decoration: underline;
    font-weight: 500;
    transition: color 0.3s ease;
}

.checkpoint-message-content a:hover {
    text-decoration: none;
}

/* Responsive design for checkpoint message */
@media (max-width: 768px) {
    .checkpoint-message {
        padding: 0.875rem;
        margin-bottom: 1.25rem;
    }
    
    .checkpoint-message-content p {
        font-size: 1rem;
    }
}