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

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --light-bg: #f8fafc;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--light-bg);
}

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

/* Header */
.header {
    background: white;
    padding: 1rem 2rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    border-radius: 8px;
}

.header-left {
    display: flex;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

.nav {
    display: flex;
    gap: 1rem;
    margin: 0 2rem;
}

.nav-link {
    padding: 0.5rem 1rem;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: 6px;
    transition: all 0.2s;
}

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

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

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

.user-info {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
}

.stat-card.stat-pending {
    border-left-color: var(--warning-color);
}

.stat-card.stat-ready {
    border-left-color: var(--primary-color);
}

.stat-card.stat-progress {
    border-left-color: var(--info-color);
}

.stat-card.stat-complete {
    border-left-color: var(--success-color);
}

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

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

/* Filters */
.filters {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

.filter-form {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Card */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.card-body {
    padding: 1.5rem;
}

/* Form Elements */
.input {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.875rem;
    transition: all 0.2s;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background-color: #1d4ed8;
}

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

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

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

.btn-success:hover {
    background-color: #059669;
}

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

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 12px;
    text-transform: uppercase;
}

.badge-primary {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.badge-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.badge-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.badge-info {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
}

.badge-secondary {
    background-color: rgba(100, 116, 139, 0.1);
    color: var(--secondary-color);
}

/* Table */
.table {
    width: 100%;
    border-collapse: collapse;
}

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

.table th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
}

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

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

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
    border: 1px solid var(--info-color);
}

/* Upload Form */
.upload-form {
    margin: 2rem 0;
}

.upload-area {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    transition: all 0.2s;
    background-color: var(--light-bg);
}

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

.upload-area.drag-over {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.1);
}

.upload-area input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-label {
    cursor: pointer;
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

/* Info Box */
.info-box {
    background-color: rgba(59, 130, 246, 0.05);
    border: 1px solid var(--info-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-top: 2rem;
}

.info-box h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--info-color);
}

.info-box ul {
    margin-left: 1.5rem;
}

.info-box li {
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

/* Preview Section */
.preview-section {
    margin-top: 2rem;
}

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

.preview-card {
    background-color: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.preview-card h4 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.preview-table {
    width: 100%;
}

.preview-table th {
    text-align: left;
    padding: 0.5rem;
    font-weight: 600;
    width: 30%;
}

.preview-table td {
    padding: 0.5rem;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

.pagination-list {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.pagination-list li {
    display: inline-block;
}

.pagination-list a {
    display: block;
    padding: 0.5rem 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: all 0.2s;
}

.pagination-list a:hover {
    background-color: var(--light-bg);
}

.pagination-list li.active a {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-state a {
    color: var(--primary-color);
    text-decoration: none;
}

.empty-state a:hover {
    text-decoration: underline;
}

/* Notification System */
.notification-container {
    position: relative;
}

.notification-bell {
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.2s;
}

.notification-bell:hover {
    background-color: var(--light-bg);
}

.notification-bell .icon {
    width: 24px;
    height: 24px;
    color: var(--text-secondary);
}

.notification-count {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--danger-color);
    color: white;
    border-radius: 10px;
    padding: 2px 6px;
    font-size: 0.75rem;
    font-weight: 600;
    min-width: 20px;
    text-align: center;
}

.notification-dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    min-width: 320px;
    max-width: 400px;
    max-height: 400px;
    overflow-y: auto;
    z-index: 1000;
}

.notification-dropdown.hidden {
    display: none;
}

.notification-dropdown a {
    display: block;
    padding: 1rem;
    text-decoration: none;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s;
}

.notification-dropdown a:last-child {
    border-bottom: none;
}

.notification-dropdown a:hover {
    background-color: var(--light-bg);
}

.notification-dropdown p {
    padding: 1rem;
    margin: 0;
    color: var(--text-secondary);
    text-align: center;
}

.hidden {
    display: none;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
    }

    .nav {
        margin: 0;
    }

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

    .filter-form {
        flex-direction: column;
    }

    .filter-form .input {
        width: 100%;
    }

    .table {
        font-size: 0.75rem;
    }

    .table th,
    .table td {
        padding: 0.5rem;
    }

    .notification-dropdown {
        right: auto;
        left: 0;
        min-width: 280px;
    }
}