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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --light-gray: #ecf0f1;
    --dark-gray: #95a5a6;
    --white: #ffffff;
    --text-dark: #2c3e50;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--light-gray);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    opacity: 0.8;
    text-decoration: underline;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 3rem 0;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.hero p {
    font-size: 1.2rem;
    color: var(--dark-gray);
}

/* Form Styles */
.input-section {
    background-color: var(--white);
    border-radius: 10px;
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow);
}

.analyze-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--light-gray);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.btn-primary {
    width: 100%;
    padding: 1rem;
    background-color: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-primary:disabled {
    background-color: var(--dark-gray);
    cursor: not-allowed;
}

/* Loading Spinner */
.loading {
    text-align: center;
    padding: 2rem;
}

.spinner {
    border: 4px solid var(--light-gray);
    border-top: 4px solid var(--secondary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

/* Error Message */
.error {
    background-color: #fadbd8;
    color: var(--danger-color);
    padding: 1rem;
    border-radius: 5px;
    margin-top: 1rem;
    border-left: 4px solid var(--danger-color);
}

/* Results Section */
.results {
    margin: 2rem 0;
}

.results h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--primary-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-card h4 {
    font-size: 1rem;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-value.win {
    color: var(--success-color);
}

.stat-value.loss {
    color: var(--danger-color);
}

.stat-value.draw {
    color: var(--warning-color);
}

/* Detailed Stats */
.detailed-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.stat-section {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.stat-section h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.color-stats,
.time-control-stats {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.stat-item {
    padding: 1rem;
    background-color: var(--light-gray);
    border-radius: 5px;
}

.stat-item-header {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.stat-item-details {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--dark-gray);
}

/* Info Section */
.info-section {
    margin: 2rem 0;
}

.info-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.info-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

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

.info-card li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.info-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* ==================== DASHBOARD STYLES ==================== */

/* Dashboard Container */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 20px;
    min-height: calc(100vh - 200px);
}

/* Dashboard Input Section */
.dashboard-input-section {
    margin-bottom: 2rem;
}

.input-card {
    background-color: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.input-card h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.subtitle {
    color: var(--dark-gray);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* Analytics Form */
.analytics-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.analytics-form .form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.analytics-form .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.analytics-form input,
.analytics-form select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.analytics-form input:focus,
.analytics-form select:focus {
    outline: none;
    border-color: var(--secondary-color);
}

/* Date Presets */
.date-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.date-presets label {
    font-weight: 600;
    margin-right: 0.5rem;
    color: var(--text-dark);
}

.btn-preset {
    padding: 0.5rem 1rem;
    background-color: var(--light-gray);
    border: 2px solid var(--light-gray);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9rem;
    font-weight: 500;
}

.btn-preset:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    color: var(--white);
}

/* PRD v2.2: Date Range Info and Error */
.date-range-info {
    margin-top: 0.5rem;
    margin-bottom: 1rem;
}

.date-range-info small {
    color: var(--dark-gray);
    font-size: 0.85rem;
    font-style: italic;
}

.date-range-error {
    background-color: #fee;
    border: 1px solid var(--danger-color);
    border-radius: 6px;
    padding: 0.75rem;
    margin-bottom: 1rem;
    color: var(--danger-color);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Analyze Button */
.btn-analyze {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--secondary-color), #2980b9);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.3s;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.btn-analyze:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(52, 152, 219, 0.4);
}

.btn-analyze:active {
    transform: translateY(0);
}

.btn-analyze:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    font-size: 1.2rem;
}

/* Error Message */
.error-message {
    margin-top: 1rem;
    padding: 1rem;
    background-color: #fee;
    border-left: 4px solid var(--danger-color);
    border-radius: 6px;
    color: var(--danger-color);
    font-weight: 500;
}

/* Loading State */
.loading-state {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-card {
    background-color: var(--white);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    max-width: 400px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.spinner {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem;
    border: 4px solid var(--light-gray);
    border-top-color: var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.loading-card p {
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.loading-progress {
    margin-top: 1.5rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--light-gray);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color), var(--success-color));
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--dark-gray);
}

/* Empty State */
.empty-state {
    margin-top: 3rem;
}

.empty-card {
    background-color: var(--white);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.empty-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.empty-card p {
    color: var(--dark-gray);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    text-align: left;
    max-width: 700px;
    margin: 0 auto;
}

.feature-item {
    padding: 0.75rem;
    background-color: var(--light-gray);
    border-radius: 6px;
    color: var(--text-dark);
    font-weight: 500;
}

/* Dashboard Results */
.dashboard-results {
    margin-top: 2rem;
}

/* Analysis Header */
.analysis-header {
    margin-bottom: 2rem;
}

.header-card {
    background-color: var(--white);
    border-radius: 12px;
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-main h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

#displayUsername {
    color: var(--secondary-color);
    font-weight: 700;
}

.header-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    color: var(--dark-gray);
    font-size: 0.95rem;
}

.separator {
    color: var(--light-gray);
}

.btn-export {
    padding: 0.75rem 1.5rem;
    background-color: var(--light-gray);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.3s;
}

.btn-export:hover {
    background-color: var(--dark-gray);
    color: var(--white);
}

/* Analytics Sections */
.analytics-section {
    margin-bottom: 2rem;
}

.section-card {
    background-color: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.section-header {
    margin-bottom: 1.5rem;
}

.section-header h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.section-description {
    color: var(--dark-gray);
    font-size: 0.95rem;
}

/* Section Grid Layouts */
.section-grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
}

/* Color Summary Grid */
.color-summary-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.color-summary-card {
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.white-card {
    background: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
    border-left: 4px solid #34495e;
}

.black-card {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
}

.color-summary-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.color-stats {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin-top: 1rem;
}

.color-stat-item {
    display: flex;
    flex-direction: column;
}

.color-stat-label {
    font-size: 0.85rem;
    opacity: 0.8;
    margin-bottom: 0.25rem;
}

.color-stat-value {
    font-size: 1.8rem;
    font-weight: 700;
}

/* Chart Containers */
.chart-container {
    position: relative;
    height: 350px;
    margin-bottom: 1rem;
}

.chart-doughnut {
    height: 300px;
}

/* Stats Summary */
.stats-summary {
    display: flex;
    justify-content: space-around;
    padding: 1rem;
    background-color: var(--light-gray);
    border-radius: 8px;
    margin-top: 1rem;
}

.stat-item {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--dark-gray);
    margin-bottom: 0.25rem;
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Termination Legend */
.termination-legend {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
    margin-top: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    background-color: var(--light-gray);
    border-radius: 6px;
    font-size: 0.9rem;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 3px;
}

/* Opening Content */
.opening-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.opening-section {
    padding: 1.5rem;
    background-color: #fafafa;
    border-radius: 8px;
}

.opening-subtitle {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.opening-table {
    margin-top: 1rem;
}

.opening-row {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem;
    background-color: var(--white);
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* Iteration 5: Opening header with name and games count */
.opening-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Iteration 5: Opening details section for moves and links */
.opening-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* PRD v2.1: Styling for first 6 moves display */
.opening-moves {
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: #555;
    padding: 8px 12px;
    background-color: #f8f9fa;
    border-left: 3px solid var(--secondary-color);
    border-radius: 4px;
}

/* Iteration 5: Links container */
.opening-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Iteration 5: Individual link styling */
.opening-link {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    background-color: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.85rem;
    transition: background-color 0.3s;
}

.opening-link:hover {
    background-color: var(--primary-color);
    text-decoration: none;
}

/* EA-027: Video Learning button — blue variant */
.opening-link-video {
    background-color: #3498db;
    color: white !important;
}

.opening-link-video:hover {
    background-color: #2980b9;
    color: white !important;
}

.opening-name {
    font-weight: 600;
    color: var(--text-dark);
}

.opening-games {
    font-size: 0.9rem;
    color: var(--dark-gray);
    font-weight: 500;
}

.opening-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
}

.opening-stat {
    display: flex;
    flex-direction: column;
}

.opening-stat-label {
    color: var(--dark-gray);
}

.opening-stat-value {
    font-weight: 700;
}

/* Strength Grid */
.strength-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.strength-card {
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 10px;
    text-align: center;
    border-left: 4px solid var(--secondary-color);
}

.strength-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.strength-subtitle {
    font-size: 0.85rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.strength-stats {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.strength-stat-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem;
    background-color: var(--white);
    border-radius: 6px;
}

.strength-win-rate {
    font-size: 2rem;
    font-weight: 700;
    margin: 1rem 0;
}

/* Time Grid */
.time-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.time-card {
    padding: 1.5rem;
    background: linear-gradient(135deg, #fff5e6 0%, #ffe8cc 100%);
    border-radius: 10px;
    text-align: center;
    border-left: 4px solid var(--warning-color);
}

.time-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.time-subtitle {
    font-size: 0.85rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.time-stats {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.time-stat-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem;
    background-color: var(--white);
    border-radius: 6px;
}

.time-win-rate {
    font-size: 2rem;
    font-weight: 700;
    margin: 1rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h2 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .detailed-stats {
        grid-template-columns: 1fr;
    }

    .nav-links {
        gap: 1rem;
    }
    
    /* Dashboard Responsive */
    .section-grid-2 {
        grid-template-columns: 1fr;
    }
    
    .strength-grid,
    .time-grid {
        grid-template-columns: 1fr;
    }
    
    .header-card {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .analytics-form .form-row {
        grid-template-columns: 1fr;
    }
    
    .date-presets {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .chart-container {
        height: 300px;
    }
    
    .opening-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
}

/* ==================== MILESTONE 8: MISTAKE ANALYSIS STYLES ==================== */

/* Mistake Summary Cards */
.mistake-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.mistake-summary-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.mistake-summary-card h4 {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.mistake-highlight {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

/* Mistake Table */
.table-container {
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.mistake-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--white);
}

.mistake-table thead {
    background-color: #f8f9fa;
    border-bottom: 2px solid #dee2e6;
}

.mistake-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-dark);
    white-space: nowrap;
}

.mistake-table td {
    padding: 1rem;
    border-bottom: 1px solid #f0f0f0;
    font-size: 0.95rem;
}

.mistake-table tbody tr:hover {
    background-color: #f8f9fa;
}

.mistake-table tbody tr:last-child td {
    border-bottom: none;
}

/* Stage Names */
.stage-name {
    font-weight: 600;
    color: var(--primary-color);
}

.stage-early {
    color: #27ae60;
}

.stage-middle {
    color: #f39c12;
}

.stage-endgame {
    color: #e74c3c;
}

/* Mistake Counts */
.mistake-count {
    display: inline-block;
    min-width: 30px;
    text-align: center;
}

.mistake-count-high {
    color: #e74c3c;
    font-weight: 600;
}

.mistake-count-medium {
    color: #f39c12;
    font-weight: 500;
}

.mistake-count-low {
    color: #27ae60;
}

/* CP Loss Display */
.cp-loss {
    font-family: 'Courier New', monospace;
    font-weight: 500;
}

.cp-loss-high {
    color: #e74c3c;
}

.cp-loss-medium {
    color: #f39c12;
}

.cp-loss-low {
    color: #27ae60;
}

/* v2.5: Move Quality Display */
.move-quality {
    display: inline-block;
    min-width: 35px;
    text-align: center;
    font-weight: 500;
}

.quality-high {
    color: #27ae60;  /* Green for high brilliant moves */
    font-weight: 600;
}

.quality-medium {
    color: #3498db;  /* Blue for medium brilliant moves */
    font-weight: 500;
}

.quality-low {
    color: #95a5a6;  /* Gray for low brilliant moves */
}

.quality-high-bad {
    color: #e74c3c;  /* Red for many mistakes */
    font-weight: 600;
}

.quality-medium-bad {
    color: #f39c12;  /* Orange for some mistakes */
    font-weight: 500;
}

.quality-low-good {
    color: #27ae60;  /* Green for few mistakes */
    font-weight: 500;
}

.quality-neutral {
    color: #34495e;  /* Dark gray for neutral moves */
}

/* Critical Mistake Link */
.critical-mistake-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.critical-mistake-link:hover {
    color: #2980b9;
    text-decoration: underline;
}

.section-note {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: #f8f9fa;
    border-left: 4px solid var(--secondary-color);
    border-radius: 4px;
}

.section-note p {
    margin: 0;
    font-size: 0.9rem;
    color: #6c757d;
}

/* ==================== MILESTONE 9: AI ADVISOR STYLES ==================== */

.ai-advisor-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
}

.ai-advisor-card .section-header h3 {
    color: var(--white);
}

.ai-advisor-card .section-description {
    color: rgba(255, 255, 255, 0.9);
}

/* AI Loading State */
.ai-loading {
    text-align: center;
    padding: 3rem 2rem;
}

.spinner {
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid var(--white);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

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

.ai-loading p {
    margin: 0.5rem 0;
    font-size: 1.1rem;
}

.ai-loading-detail {
    font-size: 0.9rem !important;
    opacity: 0.8;
}

/* AI Content */
.ai-content {
    background-color: var(--white);
    border-radius: 12px;
    padding: 2rem;
    color: var(--text-dark);
}

.ai-suggestions {
    margin-bottom: 2rem;
}

.ai-suggestions h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.ai-suggestions ul {
    list-style: none;
    padding-left: 0;
}

.ai-suggestions li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 1rem;
    line-height: 1.6;
    color: #2c3e50;
}

.ai-suggestions li:before {
    content: "•";
    position: absolute;
    left: 0.5rem;
    font-size: 1.5rem;
    color: var(--secondary-color);
    font-weight: bold;
}

.ai-overall {
    padding: 1.5rem;
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
    border-left: 4px solid #667eea;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.ai-overall h4 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.ai-overall p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.7;
    color: #2c3e50;
}

/* Regenerate Button */
.btn-regenerate {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: block;
    margin: 0 auto;
}

.btn-regenerate:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-regenerate:active {
    transform: translateY(0);
}

/* Cost Info */
.ai-cost-info {
    text-align: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e0e0e0;
}

.ai-cost-info small {
    color: #6c757d;
    font-size: 0.85rem;
}

/* AI Error State */
.ai-error {
    text-align: center;
    padding: 2rem;
    background-color: rgba(231, 76, 60, 0.1);
    border-radius: 8px;
    color: var(--danger-color);
}

.ai-error p {
    margin: 0;
    font-size: 1rem;
}

@media (max-width: 480px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .input-section {
        padding: 1rem;
    }

    .stat-value {
        font-size: 2rem;
    }
    
    .dashboard-container {
        padding: 1rem 10px;
    }
    
    .input-card,
    .section-card {
        padding: 1.5rem;
    }
    
    .loading-card {
        padding: 2rem;
        margin: 1rem;
    }
    
    .chart-container {
        height: 250px;
    }
    
    /* Mistake Analysis Responsive */
    .mistake-summary {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .table-container {
        font-size: 0.85rem;
    }
    
    .mistake-table th,
    .mistake-table td {
        padding: 0.75rem 0.5rem;
    }
    
    /* AI Advisor Responsive */
    .ai-content {
        padding: 1.5rem;
    }
    
    .ai-suggestions li {
        padding-left: 1.5rem;
        font-size: 0.95rem;
    }
}

/* Loading Spinner for Async Operations */
.loading-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.5rem;
}

.spinner {
     border: 4px solid var(--light-gray);
    border-top: 4px solid var(--secondary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    font-size: 1rem;
    color: var(--text-dark);
    font-weight: 500;
}