:root {
    --bg-color: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-border: rgba(0, 0, 0, 0.08);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --primary: #0284c7;
    --primary-hover: #0369a1;
    --accent: #d946ef;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --success: #10b981;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
    --radius: 16px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0b1329;
        --card-bg: rgba(15, 23, 42, 0.75);
        --card-border: rgba(255, 255, 255, 0.1);
        --text-main: #f8fafc;
        --text-muted: #94a3b8;
        --primary: #38bdf8;
        --primary-hover: #0284c7;
        --danger: #f87171;
        --danger-hover: #ef4444;
        --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

.app-header {
    width: 100%;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border-bottom: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.back-link {
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.05);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.2s;
}

@media (prefers-color-scheme: dark) {
    .back-link {
        background: rgba(255, 255, 255, 0.08);
    }
}

.back-link:hover {
    color: var(--primary);
    transform: translateX(-2px);
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

.app-main {
    max-width: 1600px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Stats Bar */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-top: 0.2rem;
}

/* Controls Card */
.controls-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.filters-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.filter-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.select-input, .text-input {
    width: 100%;
    padding: 0.65rem 0.9rem;
    border-radius: 10px;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-main);
    font-size: 0.9rem;
    outline: none;
    transition: all 0.2s;
}

@media (prefers-color-scheme: dark) {
    .select-input, .text-input {
        background: rgba(255, 255, 255, 0.05);
    }
}

.select-input:focus, .text-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.actions-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--card-border);
}

.actions-left, .actions-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn {
    padding: 0.65rem 1.2rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;

}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.primary-btn:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.secondary-btn {
    background: rgba(0, 0, 0, 0.06);
    color: var(--text-main);
}

@media (prefers-color-scheme: dark) {
    .secondary-btn {
        background: rgba(255, 255, 255, 0.1);
    }
}

.secondary-btn:hover:not(:disabled) {
    background: rgba(0, 0, 0, 0.12);
}

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

.danger-btn:hover:not(:disabled) {
    background: var(--danger);
    color: white;
}

.text-btn {
    background: transparent;
    color: var(--text-muted);
}

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

/* Table Card */
.table-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.table-container {
    overflow-x: auto;
    max-height: 620px;
    position: relative;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
    white-space: nowrap;
}

.data-table th {
    background: rgba(0, 0, 0, 0.03);
    color: var(--text-muted);
    font-weight: 600;
    padding: 0.9rem 1rem;
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(10px);
}

@media (prefers-color-scheme: dark) {
    .data-table th {
        background: rgba(255, 255, 255, 0.05);
    }
}

.data-table td {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--card-border);
    color: var(--text-main);
}

.data-table tbody tr:hover {
    background: rgba(2, 132, 199, 0.04);
}

.text-right {
    text-align: right;
}

.text-center {
    text-align: center;
}

.num-cell {
    font-family: 'SF Mono', Menlo, Monaco, Consolas, monospace;
    font-weight: 500;
}

.badge {
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
}

.badge-blue {
    background: rgba(2, 132, 199, 0.1);
    color: #0284c7;
}

.badge-purple {
    background: rgba(217, 70, 239, 0.1);
    color: #d946ef;
}

.pagination-bar {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--card-border);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.pagination-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-main);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.3s;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    width: 90%;
    max-width: 620px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
}

.modal-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.drop-zone {
    border: 2px dashed var(--primary);
    border-radius: 14px;
    padding: 2.5rem 1.5rem;
    text-align: center;
    background: rgba(2, 132, 199, 0.03);
    cursor: pointer;
    transition: all 0.2s;
}

.drop-zone:hover, .drop-zone.drag-over {
    background: rgba(2, 132, 199, 0.08);
    transform: scale(1.01);
}

.drop-icon {
    width: 48px;
    height: 48px;
    color: var(--primary);
    margin-bottom: 1rem;
}

.drop-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.drop-title span {
    color: var(--primary);
    text-decoration: underline;
}

.drop-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.hidden-file-input {
    display: none;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 150px;
    overflow-y: auto;
}

.file-item {
    background: rgba(0, 0, 0, 0.03);
    padding: 0.6rem 0.9rem;
    border-radius: 8px;
    font-size: 0.85rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.summary-box {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
    padding: 1rem;
    border-radius: 10px;
    font-size: 0.85rem;
}

.error-box {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
    padding: 1rem;
    border-radius: 10px;
    font-size: 0.85rem;
    white-space: pre-wrap;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--card-border);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Toast Container */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 1rem 1.25rem;
    border-radius: 10px;
    color: white;
    font-size: 0.9rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    animation: slideIn 0.3s ease-out;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--primary); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.hidden { display: none !important; }