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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #64748b;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --bg: #f8fafc;
    --bg-secondary: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* Header */
.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    box-shadow: var(--shadow);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.header-left .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 1.25rem;
}

.header-nav {
    display: flex;
    gap: 2rem;
    flex: 1;
    justify-content: center;
}

.header-nav a {
    color: var(--text);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    transition: background-color 0.2s;
}

.header-nav a:hover {
    background-color: var(--bg);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.username {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Main Content */
.main-content {
    padding: 2rem 0;
    min-height: calc(100vh - 80px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Session Navigation Bar */
.session-nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.session-nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.session-info {
    flex: 1;
    min-width: 200px;
    display: flex;
    flex-direction: column;
}

.session-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 0.25rem 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
}

.session-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.badge-shared {
    background: #4CAF50;
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.session-nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.session-nav-link {
    padding: 0.5rem 1rem;
    color: var(--text);
    text-decoration: none;
    border-radius: 0.375rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.session-nav-link:hover {
    background: var(--bg);
    color: var(--primary);
}

.session-nav-link.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.session-nav-actions {
    display: flex;
    gap: 0.5rem;
    margin-left: 0.5rem;
    padding-left: 0.5rem;
    border-left: 1px solid var(--border);
}

.btn-icon {
    padding: 0.5rem;
    min-width: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-danger {
    background: #dc3545;
    border-color: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
    border-color: #bd2130;
}

@media (max-width: 768px) {
    .session-nav-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .session-nav-links {
        width: 100%;
        justify-content: space-between;
    }
    
    .session-nav-link {
        flex: 1;
        text-align: center;
    }
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 700;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
}

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

.btn-secondary:hover {
    background-color: #475569;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-hint {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* Auth Pages */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-container {
    width: 100%;
    max-width: 400px;
    padding: 1.5rem;
}

.auth-card {
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.auth-card h1 {
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 1.75rem;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

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

.auth-footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1.5rem;
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

/* Cards */
.session-card,
.upload-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.session-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.session-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.session-meta {
    margin-bottom: 1rem;
}

.text-muted {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.session-actions {
    display: flex;
    gap: 0.5rem;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--bg);
    color: var(--text);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Sessions Grid */
.sessions-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.date-header {
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border);
}

.date-header:first-child {
    margin-top: 0;
}

.date-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-state svg {
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.empty-state p {
    margin-bottom: 2rem;
}

/* Tables */
.table-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background-color: var(--bg);
}

.data-table th {
    padding: 0.875rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.data-table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}

.data-table tbody tr:hover {
    background-color: var(--bg);
}

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

/* Chart Sections */
.chart-section,
.table-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.chart-section h2,
.table-section h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.chart-container {
    position: relative;
    height: 400px;
    margin-top: 1rem;
}

/* Filters */
.filters-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1.25rem 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.filter-form {
    display: flex;
    flex-direction: column;
    min-height: 180px;
    justify-content: flex-end;
}

.filter-bottom-row {
    display: flex;
    gap: 1.5rem;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-top: auto;
}

.filter-right-column {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
    min-width: 150px;
}

.filter-club {
    min-width: 150px;
}

.filter-distance {
    flex: 1;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.filter-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

/* Distance Range Slider with Histogram */
#distance-filter-container {
    position: relative;
    padding: 15px 15px 15px 15px;
    background: var(--bg, #f8fafc);
    border-radius: 8px;
    margin-top: 0.5rem;
    border: 1px solid var(--border);
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

#histogram-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.4;
    pointer-events: none;
    border-radius: 8px;
}

/* noUiSlider customization */
#distance-range-slider {
    position: relative;
    z-index: 1;
    margin-top: 10px;
    margin-bottom: 0;
    padding-bottom: 0;
}

.filter-distance label {
    margin-bottom: 0.5rem;
}

/* Override noUiSlider styles to match theme */
#distance-range-slider .noUi-connect {
    background: var(--primary);
}

#distance-range-slider .noUi-handle {
    background: var(--primary);
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

#distance-range-slider .noUi-handle:before,
#distance-range-slider .noUi-handle:after {
    background: rgba(255, 255, 255, 0.3);
}

#distance-range-slider .noUi-tooltip {
    background: var(--primary);
    color: white;
    border: none;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 4px;
}

#distance-range-slider .noUi-base {
    background: rgba(0, 0, 0, 0.05);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
}

.chart-description {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

/* Upload Hint */
.upload-hint {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed var(--border);
    border-radius: 0.5rem;
    padding: 3rem 2rem;
    text-align: center;
    background: var(--bg);
    margin-bottom: 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.drop-zone:hover {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.drop-zone.drag-over {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
    transform: scale(1.02);
}

.drop-zone-content {
    pointer-events: none;
}

.drop-zone-content svg {
    margin-bottom: 1rem;
    color: var(--text-muted);
    opacity: 0.7;
}

.drop-zone.drag-over .drop-zone-content svg {
    color: var(--primary);
    opacity: 1;
}

.drop-zone-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.drop-zone-content p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Drag active state for main content */
.main-content.drag-active {
    position: relative;
}

.main-content.drag-active::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(37, 99, 235, 0.1);
    border: 3px dashed var(--primary);
    border-radius: 0.5rem;
    pointer-events: none;
    z-index: 1000;
    margin: 1rem;
}

/* Alert info style */
.alert-info {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .header-nav {
        flex-direction: column;
        gap: 0.5rem;
        width: 100%;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .table-container {
        overflow-x: auto;
    }
    
    .data-table {
        min-width: 800px;
    }
}

/* Analytics Page Additional Styles */
.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.stat-card h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 0.75rem 0;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 0.5rem 0;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.stat-description {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.filter-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.filter-section h3 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.125rem;
    font-weight: 600;
}

.filter-section label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
}

.filter-section select,
.filter-section input {
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    font-size: 0.875rem;
    background: var(--bg);
    color: var(--text);
    min-width: 150px;
}

.filter-section select:focus,
.filter-section input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.chart-description {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.chart-description strong {
    color: var(--text);
    font-weight: 600;
}

/* Responsive grid for charts */
.session-charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    align-items: start;
}

.session-charts-grid .swings-donut-container {
    height: 140px !important;
    max-width: 180px;
}

.session-charts-grid .swings-donut-container canvas {
    max-height: 110px !important;
}

@media (max-width: 968px) {
    .session-charts-grid {
        grid-template-columns: 1fr !important;
    }
    
    .session-charts-grid .chart-container {
        height: auto !important;
    }
    
    .session-charts-grid .swings-donut-container {
        max-width: 250px;
        margin: 0 auto;
        height: 200px !important;
    }
}

@media (max-width: 768px) {
    .chart-section > div[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }
    
    .chart-section > div[style*="grid-template-columns"] > div.chart-container {
        height: auto !important;
        min-height: 250px;
    }
}