/**
 * Battlefield 6 TTK Visualization - Stylesheet
 * Features a military-inspired dark theme with responsive design
 */

/* ============================================
   CSS Variables for Theme Management
   ============================================ */
:root {
    /* Dark Theme Colors */
    --bg-primary: #121212;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --bg-card: #1e1e1e;

    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;

    --accent-primary: #ff6b35;    /* Orange-red */
    --accent-secondary: #f7931e;  /* Orange */
    --accent-success: #4ecdc4;    /* Teal */
    --accent-warning: #ffc857;    /* Yellow */

    --border-color: #333;
    --border-radius: 8px;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'Fira Code', 'Consolas', 'Monaco', monospace;
}

.light-theme {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e8e8e8;
    --bg-card: #fafafa;

    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #808080;

    --border-color: #ddd;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Skip Links for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accent-primary);
    color: white;
    padding: 8px;
    z-index: 1000;
    text-decoration: none;
    border-radius: 4px;
}

.skip-link:focus {
    top: 6px;
}

body.dark-theme {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

code, pre {
    font-family: var(--font-mono);
    background-color: var(--bg-tertiary);
    border-radius: 4px;
}

code {
    padding: 0.2em 0.4em;
    font-size: 0.9em;
}

pre {
    padding: var(--spacing-md);
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
}

pre code {
    padding: 0;
    background: none;
}

/* ============================================
   Layout Components
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

header {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-bottom: 2px solid var(--accent-primary);
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
}

header h1 {
    margin-bottom: var(--spacing-sm);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
}

.header-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

/* ============================================
   Buttons
   ============================================ */
button, .btn-primary, .btn-secondary {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-family);
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.4);
    text-decoration: none;
}

.btn-secondary {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-primary);
    text-decoration: none;
}

/* ============================================
   Controls Section
   ============================================ */
.controls-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.control-group label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.control-group small {
    color: var(--text-muted);
    font-size: 0.8rem;
}

select, input[type="text"] {
    padding: var(--spacing-sm);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: var(--font-family);
    transition: border-color 0.2s ease;
}

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

select[multiple] {
    min-height: 150px;
}

/* Recoil Impact control visibility */
#recoilImpactGroup { display: none; }
.show-recoil #recoilImpactGroup { display: block; }

/* ============================================
   Statistics Summary
   ============================================ */
.stats-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
}

/* ============================================
   Chart Sections
   ============================================ */
.chart-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.chart-container {
    min-height: 500px;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.chart-info {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border-left: 4px solid var(--accent-warning);
    border-radius: 4px;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.chart-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
}

.chart-container-small {
    min-height: 400px;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
}

/* Loading and Error States */
.loading-indicator, .error-message {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    border-radius: var(--border-radius);
}

.loading-indicator {
    background-color: var(--bg-secondary);
    color: var(--accent-primary);
    animation: pulse 2s ease-in-out infinite alternate;
}

.error-message {
    background-color: rgba(231, 76, 60, 0.1);
    color: #e74c3c;
    border: 2px solid #e74c3c;
}

@keyframes pulse {
    from { opacity: 0.6; }
    to { opacity: 1; }
}

/* ============================================
   Table Section
   ============================================ */
.table-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.table-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
}

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--border-radius);
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-secondary);
}

thead {
    background-color: var(--bg-tertiary);
    position: sticky;
    top: 0;
    z-index: 10;
}

th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--accent-primary);
    color: var(--text-secondary);
}

td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

tr:hover {
    background-color: var(--bg-tertiary);
}

tr.incomplete-data {
    opacity: 0.6;
}

/* Status badges */
.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.complete {
    background-color: rgba(78, 205, 196, 0.2);
    color: var(--accent-success);
}

.status-badge.incomplete {
    background-color: rgba(255, 201, 87, 0.2);
    color: var(--accent-warning);
}

/* ============================================
   Contribute Section
   ============================================ */
.contribute-section, .methodology-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.contribute-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contribute-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    text-align: center;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.contribute-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
}

.contribute-card h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.contribute-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Methodology Section
   ============================================ */
.methodology-content ul {
    margin-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.methodology-content li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

/* ============================================
   Footer
   ============================================ */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xxl);
    text-align: center;
}

footer p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.disclaimer {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ============================================
   Utility Classes
   ============================================ */
.error-message {
    background-color: rgba(255, 107, 53, 0.1);
    border: 1px solid var(--accent-primary);
    border-left: 4px solid var(--accent-primary);
    color: var(--accent-primary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

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

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

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

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

    .header-actions {
        flex-direction: column;
    }

    .table-controls {
        flex-direction: column;
    }

    .search-input {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

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

    .stat-value {
        font-size: 1.5rem;
    }
}

/* ============================================
   Dark/Light Theme Transitions
   ============================================ */
body, .btn-secondary, select, input, table, .stat-card,
.chart-section, .controls-section, .contribute-card {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    header, footer, .controls-section, .contribute-section {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .chart-section, .table-section {
        page-break-inside: avoid;
    }
}