:root {
    --primary-color: #4361ee;
    --primary-dark: #3730a3;
    --primary-light: #eef2ff;
    --secondary-color: #6366f1;
    --success-color: #10b981;
    --success-dark: #059669;
    --success-light: #ecfdf5;
    --warning-color: #f59e0b;
    --warning-dark: #d97706;
    --danger-color: #ef4444;
    --dark-color: #0f172a;
    --light-color: #f8fafc;
    --border-color: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --surface: #ffffff;
    --bg: #f1f5f9;
    --shadow: 0 1px 3px rgba(15,23,42,0.07), 0 1px 2px rgba(15,23,42,0.04);
    --shadow-lg: 0 10px 15px -3px rgba(15,23,42,0.08), 0 4px 6px -4px rgba(15,23,42,0.05);
    --shadow-xl: 0 25px 50px -12px rgba(15,23,42,0.18);
    --radius: 12px;
    --radius-lg: 16px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Inter', sans-serif;
    background: var(--bg);
    background-image:
        radial-gradient(ellipse at 0% 0%, rgba(67,97,238,0.06) 0%, transparent 45%),
        radial-gradient(ellipse at 100% 100%, rgba(124,58,237,0.05) 0%, transparent 45%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 24px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 36px;
    padding: 32px 24px;
    background: linear-gradient(135deg, #0f172a 0%, #1a2e4a 55%, #1e3a8a 100%);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(15,23,42,0.28), inset 0 1px 0 rgba(255,255,255,0.07);
    color: white;
    position: relative;
    overflow: hidden;
}

.header::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -5%;
    width: 350px;
    height: 200%;
    background: radial-gradient(ellipse, rgba(255,255,255,0.04) 0%, transparent 65%);
    pointer-events: none;
}

.header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: -0.03em;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.header .subtitle {
    font-size: 1rem;
    opacity: 0.82;
    font-weight: 400;
}

.header .notice {
    font-size: 0.88rem;
    margin-top: 16px;
    padding: 11px 20px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    display: inline-block;
    font-weight: 500;
    backdrop-filter: blur(8px);
}

.header .notice i {
    margin-right: 7px;
    color: #fbbf24;
}

/* Upload Section */
.upload-section {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 36px;
    margin-bottom: 28px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.upload-box {
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    padding: 56px 40px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.upload-box:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.upload-box.drag-over {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.upload-box i {
    font-size: 3.5rem;
    color: var(--primary-color);
    margin-bottom: 18px;
    display: block;
}

.upload-box h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.upload-box p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.file-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 18px 20px;
    background: var(--success-light);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 10px;
    font-size: 1rem;
}

.file-info i {
    font-size: 1.8rem;
    color: var(--success-color);
}

/* Buttons */
.button-group {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 11px 28px;
    border: none;
    border-radius: 9px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.1px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(67,97,238,0.35);
}

.btn-primary i {
    color: white !important;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #312e81 0%, var(--primary-dark) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(67,97,238,0.45);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--success-dark) 0%, var(--success-color) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(5,150,105,0.35);
}

.btn-secondary i {
    color: white !important;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #047857 0%, var(--success-dark) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(5,150,105,0.45);
}

.btn-danger {
    background: #475569;
    color: white;
    box-shadow: 0 2px 6px rgba(71,85,105,0.3);
}

.btn-danger i {
    color: white !important;
}

.btn-danger:hover {
    background: #334155;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(71,85,105,0.4);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.85rem;
}

/* Summary Cards */
.summary-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 18px;
    margin-bottom: 20px;
}

/* Date Range Section */
.date-range-section {
    margin-bottom: 28px;
}

.date-range-card {
    background: linear-gradient(135deg, #0f172a 0%, #1a2e4a 55%, #1e3a8a 100%);
    color: white;
    padding: 18px 28px;
    border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(15,23,42,0.22);
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 1rem;
    transition: var(--transition);
}

.date-range-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(15,23,42,0.28);
}

.date-range-card i {
    font-size: 1.8rem;
    opacity: 0.85;
}

.date-range-text {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.date-range-text strong {
    font-weight: 700;
}

#dateRangeText {
    font-weight: 600;
    background: rgba(255, 255, 255, 0.15);
    padding: 5px 15px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.15);
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 18px;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: white;
    flex-shrink: 0;
}

.card-icon.blue { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%); }
.card-icon.green { background: linear-gradient(135deg, var(--success-dark) 0%, var(--success-color) 100%); }
.card-icon.orange { background: linear-gradient(135deg, var(--warning-dark) 0%, var(--warning-color) 100%); }
.card-icon.red { background: linear-gradient(135deg, #dc2626 0%, var(--danger-color) 100%); }

.card-content h3 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 4px;
    letter-spacing: -0.04em;
    line-height: 1;
}

.card-content p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
}

/* Tabs */
.tabs-section {
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    margin-bottom: 28px;
}

.tabs {
    display: flex;
    background: var(--light-color);
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 16px 24px;
    background: none;
    border: none;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    letter-spacing: -0.01em;
}

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

.tab-btn.active {
    background: var(--surface);
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    margin-bottom: -1px;
}

.tab-content {
    display: none;
    padding: 28px;
}

.tab-content.active {
    display: block;
}

/* Table Controls */
.table-controls {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 250px;
    position: relative;
}

.search-box i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.search-box input {
    width: 100%;
    padding: 11px 14px 11px 42px;
    border: 1.5px solid var(--border-color);
    border-radius: 9px;
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--surface);
    color: var(--text-primary);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67,97,238,0.10);
}

.filter-box {
    display: flex;
    gap: 10px;
}

.filter-box select {
    padding: 11px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: 9px;
    font-size: 0.92rem;
    cursor: pointer;
    background: var(--surface);
    color: var(--text-primary);
    min-width: 150px;
    transition: var(--transition);
}

.filter-box select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67,97,238,0.10);
}

/* Table */
.table-wrapper {
    overflow-x: auto;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
}

thead {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

th {
    padding: 13px 15px;
    text-align: left;
    font-weight: 600;
    color: rgba(255,255,255,0.85);
    border-bottom: none;
    white-space: nowrap;
    font-size: 0.85rem;
    letter-spacing: 0.2px;
}

td {
    padding: 13px 15px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

tbody tr {
    transition: background 0.15s ease;
}

tbody tr:nth-child(even) td {
    background: #fafcff;
}

tbody tr:hover td {
    background: var(--primary-light);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.status-completed { background: var(--success-light); color: var(--success-dark); }
.status-inprogress { background: #fffbeb; color: var(--warning-dark); }
.status-pending { background: #fef2f2; color: #dc2626; }

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.pagination button {
    padding: 8px 14px;
    border: 1.5px solid var(--border-color);
    background: var(--surface);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 36px;
}

.pagination button:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(67,97,238,0.3);
}

.pagination button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 2px 6px rgba(67,97,238,0.3);
}

.pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Charts */
.chart-container-full {
    background: var(--surface);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    margin-bottom: 28px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.chart-container-full::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color) 0%, #7c3aed 60%, transparent 100%);
    opacity: 0.5;
}

.chart-container-full h3 {
    margin-bottom: 18px;
    color: var(--text-primary);
    font-size: 1.05rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 9px;
    letter-spacing: -0.02em;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
}

.chart-container {
    background: var(--surface);
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.chart-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color) 0%, #7c3aed 60%, transparent 100%);
    opacity: 0.4;
}

.chart-container h3 {
    margin-bottom: 16px;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* Footer */
.footer {
    text-align: center;
    color: var(--text-secondary);
    padding: 24px 20px;
    opacity: 0.7;
    font-size: 0.82rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.5rem;
    }

    .header .subtitle {
        font-size: 0.9rem;
    }

    .upload-section {
        padding: 20px;
    }

    .upload-box {
        padding: 36px 20px;
    }

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

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

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

    .filter-box select {
        width: 100%;
    }

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

    .tab-btn {
        font-size: 0.88rem;
        padding: 13px 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px 12px;
    }

    .card {
        flex-direction: column;
        text-align: center;
    }

    table {
        font-size: 0.82rem;
    }

    th, td {
        padding: 9px 10px;
    }
}