@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* CSS Variables for easy theming */
:root {
    --primary-color: #4a90e2;
    --primary-hover-color: #357abd;
    --secondary-color: #f5f7fa;
    --text-color: #333;
    --text-light-color: #666;
    --border-color: #e0e0e0;
    --background-color: #f8f9fa;
    --white-color: #fff;
    --danger-color: #e74c3c;
    --danger-hover-color: #c0392b;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --font-family: 'Inter', sans-serif;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Navigation Bar */
.navbar {
    background-color: var(--white-color);
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1rem;
}

.nav-link {
    color: var(--text-light-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: background-color 0.3s, color 0.3s;
    font-weight: 500;
}

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

.nav-link.active {
    background-color: var(--primary-color);
    color: var(--white-color);
    font-weight: 600;
}

/* Main Content Area */
.main-content {
    padding-top: 2rem;
}

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

.page-header h2 {
    color: var(--text-color);
    font-size: 2rem;
    font-weight: 700;
}

/* Buttons */
.btn {
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: all 0.3s;
    font-weight: 600;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(74, 144, 226, 0.3);
}

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

.btn-secondary:hover {
    background-color: #e9ecef;
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

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

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

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

.form-row {
    display: flex;
    gap: 1.5rem;
}

.form-row .form-group {
    flex: 1;
}

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

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: border-color 0.3s, box-shadow 0.3s;
    background-color: var(--white-color);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.2);
}

/* Tables */
.table-container {
    background: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

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

.data-table th {
    background-color: var(--secondary-color);
    color: var(--text-color);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
    border-bottom: 2px solid var(--border-color);
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

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

.data-table tbody tr:hover {
    background-color: #f1f3f5;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slide-down 0.3s ease-out;
}

@keyframes slide-down {
    from {
        transform: translateY(-30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: var(--text-color);
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light-color);
    transition: color 0.3s;
}

.close-btn:hover {
    color: var(--text-color);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    background-color: var(--secondary-color);
}

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

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

.card-header h3 {
    color: var(--text-color);
    margin: 0;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* Filter and Control Sections */
.filter-section, .period-control {
    background: var(--white-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

.filter-row, .date-range {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}

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

.stat-card {
    background: var(--white-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light-color);
    font-size: 14px;
    font-weight: 500;
}

/* Welcome Section on Homepage */
.welcome-section {
    text-align: center;
    margin-bottom: 3rem;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #4a90e2 0%, #5469d4 100%);
    color: var(--white-color);
    border-radius: var(--border-radius);
}

.welcome-section h2 {
    margin-bottom: 1rem;
    font-size: 2.5rem;
    font-weight: 700;
}

.welcome-section p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .form-row, .filter-row {
        flex-direction: column;
        gap: 0;
    }
}

/* 统计页面 - 项目分布布局 */
.distribution-layout {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.chart-container {
    flex: 1 1 50%;
    max-width: 50%;
    background: var(--white-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.distribution-table {
    flex: 1 1 50%;
    max-width: 50%;
}

/* 导入页面特定样式 */
.import-history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.import-card {
    background: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
}

.import-card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.import-card-header h4 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.import-date {
    font-size: 0.9rem;
    color: var(--text-light-color);
}

.import-card-body {
    padding: 1.5rem;
    flex-grow: 1;
}

.import-card-stats {
    display: flex;
    justify-content: space-around;
    text-align: center;
    margin-bottom: 1.5rem;
}

.stat-item span {
    display: block;
}

.stat-item .stat-value {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.stat-item .stat-label {
    font-size: 0.8rem;
}

.source-preview {
    background-color: var(--secondary-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    font-family: monospace;
    white-space: pre-wrap;
    word-break: break-all;
    font-size: 0.85rem;
    max-height: 150px;
    overflow-y: auto;
}

.import-card-footer {
    padding: 1rem 1.5rem;
    background-color: var(--secondary-color);
    border-top: 1px solid var(--border-color);
    text-align: right;
}

.status-badge {
    padding: 0.3rem 0.8rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--white-color);
}

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

.status-partial {
    background-color: var(--warning-color);
}

.status-fail {
    background-color: var(--danger-color);
}

.failures-list {
    list-style-type: none;
    padding-left: 0;
    background-color: #fff0f0;
    border: 1px solid #ffd0d0;
    border-radius: var(--border-radius);
    padding: 1rem;
    max-height: 200px;
    overflow-y: auto;
}

.failures-list li {
    padding: 0.5rem;
    border-bottom: 1px solid #ffe0e0;
}

.failures-list li:last-child {
    border-bottom: none;
}