:root {
    --bg-color: #0a0e1a;
    --bg-secondary: #0f1525;
    --card-bg: #131827;
    --text-primary: #e8ecf4;
    --text-secondary: #6b7a99;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.25);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --border-color: #1e2640;
    --glass-bg: rgba(19, 24, 39, 0.85);
    --glass-border: rgba(255, 255, 255, 0.06);
    --gradient-text: linear-gradient(135deg, #818cf8, #c084fc);
    --gradient-accent: linear-gradient(135deg, #6366f1, #8b5cf6);
    --gradient-success: linear-gradient(135deg, #10b981, #34d399);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
}

/* ─── Header ─── */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

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

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.65rem 1.25rem;
    border-radius: 0.6rem;
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.25s ease;
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-accent);
    color: white;
    box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

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

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

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

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

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

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.78rem;
    border-radius: 0.4rem;
}

/* ─── Card Grid ─── */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.doc-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all 0.35s ease;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.doc-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity 0.3s;
}

.doc-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(99, 102, 241, 0.3);
}

.doc-card:hover::before {
    opacity: 1;
}

/* ─── Status Badges ─── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.65rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-uploaded {
    background: rgba(107, 122, 153, 0.2);
    color: #94a3b8;
}

.badge-processing {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
    animation: pulse-badge 2s ease infinite;
}

.badge-processed {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.badge-verified {
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
}

@keyframes pulse-badge {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ─── Upload Zone ─── */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 1.25rem;
    padding: 3.5rem 2rem;
    text-align: center;
    background: rgba(19, 24, 39, 0.4);
    transition: all 0.3s ease;
    cursor: pointer;
    margin-bottom: 1.5rem;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--accent-color);
    background: rgba(99, 102, 241, 0.06);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.08);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 0.75rem;
    opacity: 0.7;
}

/* ─── Progress Bar ─── */
.progress-container {
    width: 100%;
    height: 8px;
    background: var(--bg-color);
    border-radius: 999px;
    overflow: hidden;
    margin: 0.75rem 0;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-accent);
    border-radius: 999px;
    transition: width 0.5s ease;
    position: relative;
}

.progress-bar.animated::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ─── Loader ─── */
.loader {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 0.8s linear infinite;
    margin: 1rem auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ─── Forms ─── */
.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input, select, textarea {
    width: 100%;
    padding: 0.65rem 0.85rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ─── Split View ─── */
.split-view {
    display: grid;
    grid-template-columns: 0.8fr 1.5fr;
    gap: 1.5rem;
    height: calc(100vh - 95px);
}

.viewer-pane, .editor-pane {
    background: var(--card-bg);
    border-radius: 0.75rem;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.pane-header {
    padding: 0.85rem 1.25rem;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pane-content {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: #fff;
}

.doc-container {
    flex: 1;
    background: #1a1a2e;
}

/* ─── Data Table ─── */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.data-table th {
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.75rem 0.6rem;
    text-align: left;
    border-bottom: 2px solid var(--border-color);
    z-index: 5;
}

.data-table td {
    padding: 0.5rem 0.6rem;
    border-bottom: 1px solid rgba(30, 38, 64, 0.5);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: background 0.15s;
}

.data-table tbody tr:nth-child(even) {
    background: rgba(15, 21, 37, 0.4);
}

.data-table tbody tr:hover {
    background: rgba(99, 102, 241, 0.06);
}

.data-table input {
    background: transparent;
    border: 1px solid transparent;
    padding: 0.3rem 0.4rem;
    font-size: 0.84rem;
    border-radius: 0.3rem;
    width: 100%;
}

.data-table input:focus {
    background: var(--bg-color);
    border-color: var(--accent-color);
    box-shadow: none;
}

/* ─── Search Bar ─── */
.search-bar {
    position: relative;
    margin-bottom: 1rem;
}

.search-bar input {
    padding-left: 2.5rem;
    background: var(--bg-secondary);
}

.search-bar::before {
    content: '🔍';
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.9rem;
    opacity: 0.5;
}

/* ─── Stats Bar ─── */
.stats-bar {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.stat-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.85rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.stat-chip strong {
    color: var(--text-primary);
}

/* ─── Info Card ─── */
.info-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

/* ─── Processing Status ─── */
.process-status {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    text-align: center;
    display: none;
}

.process-status.active {
    display: block;
}

.process-status h3 {
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.process-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}

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

.process-stat .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.process-stat .label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

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

.empty-state .icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

/* ─── Action Bar ─── */
.action-bar {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-color); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

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

    header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    h1 { font-size: 1.35rem; }

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

    .split-view {
        grid-template-columns: 1fr;
        grid-template-rows: 350px auto;
        height: auto;
    }

    .viewer-pane { height: 350px; }
    .editor-pane { height: auto; min-height: 400px; }

    .action-bar { width: 100%; }
    .action-bar .btn { flex: 1; justify-content: center; }

    .stats-bar { gap: 0.5rem; }

    .process-stats { flex-direction: column; gap: 0.5rem; }

    .data-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .data-table th, .data-table td { min-width: 100px; }
}

/* ─── Animations ─── */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.4s ease forwards;
}

/* ─── Pagination ─── */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.4rem;
    padding: 0.75rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 0.5rem;
}

.pagination button {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.35rem 0.65rem;
    border-radius: 0.35rem;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.2s;
}

.pagination button:hover {
    border-color: var(--accent-color);
    color: var(--text-primary);
}

.pagination button.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.pagination button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ─── Toast ─── */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 0.85rem 1.5rem;
    border-radius: 0.6rem;
    font-weight: 600;
    font-size: 0.875rem;
    z-index: 1000;
    animation: slideUp 0.3s ease;
    box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

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

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

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ─── Table Responsive Wrapper ─── */
.table-wrapper {
    overflow: auto;
    flex: 1;
}

/* ─── Delete Row Button ─── */
.row-delete {
    color: var(--danger-color);
    cursor: pointer;
    font-size: 1.1rem;
    text-align: center;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.row-delete:hover {
    opacity: 1;
}