:root {
    --primary: #1a237e;
    --primary-light: #3949ab;
    --primary-dark: #0d1652;
    --accent: #f64648;
    --bg: #f0f2f5;
    --card: #ffffff;
    --text: #1f2937;
    --text-light: #6b7280;
    --text-xs: #9ca3af;
    --border: #e5e7eb;
    --success: #059669;
    --success-bg: #d1fae5;
    --warning: #d97706;
    --warning-bg: #fef3c7;
    --danger: #dc2626;
    --danger-bg: #fee2e2;
    --info: #1e40af;
    --info-bg: #dbeafe;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,.08);
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font); background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.5; }

/* === SIDEBAR === */
.app { display: flex; min-height: 100vh; }
.sidebar {
    width: 260px;
    background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
}
.sidebar-brand { padding: 24px 20px 16px; border-bottom: 1px solid rgba(255,255,255,.1); }
.sidebar-brand h2 { font-size: 20px; font-weight: 700; letter-spacing: -.5px; }
.sidebar-brand small { font-size: 11px; opacity: .7; display: block; margin-top: 2px; }
.sidebar-nav { flex: 1; padding: 8px 0; overflow-y: auto; }
.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 20px;
    color: rgba(255,255,255,.85);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all .15s;
    border-left: 3px solid transparent;
}
.sidebar-nav a:hover { background: rgba(255,255,255,.1); color: #fff; }
.sidebar-nav a.active {
    background: rgba(255,255,255,.12);
    color: #fff;
    font-weight: 600;
    border-left-color: var(--accent);
}
.sidebar-nav .nav-label { font-size: 11px; color: rgba(255,255,255,.65); font-weight: 600; padding: 16px 20px 4px; text-transform: uppercase; letter-spacing: 1px; }
.sidebar-user { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,.1); display: flex; align-items: center; gap: 10px; }
.sidebar-user .avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--accent); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 14px;
    flex-shrink: 0;
}
.user-info { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.user-name { font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: 11px; opacity: .6; }
.logout-link { font-size: 18px; color: rgba(255,255,255,.5); text-decoration: none; padding: 4px; border-radius: 4px; transition: all .15s; }
.logout-link:hover { color: #fff; background: rgba(255,255,255,.1); }

/* === MAIN === */
.main-content { margin-left: 260px; flex: 1; padding: 28px 36px; min-height: 100vh; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; flex-wrap: wrap; gap: 12px; }
.page-header h1 { font-size: 26px; font-weight: 700; color: var(--primary); }
.page-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* === CARDS === */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; margin-bottom: 20px; }
.card-header {
    font-size: 16px; font-weight: 600; color: var(--primary);
    padding-bottom: 14px; margin-bottom: 16px;
    border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
}
.card-header .badge { font-size: 11px; }
.card-body { }
.card-footer { padding-top: 14px; margin-top: 16px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* === STATS === */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; position: relative; overflow: hidden; }
.stat-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 3px;
}
.stat-card.positive::before { background: var(--success); }
.stat-card.negative::before { background: var(--danger); }
.stat-card.info::before { background: var(--info); }
.stat-card .stat-icon { font-size: 24px; margin-bottom: 8px; }
.stat-card .stat-label { font-size: 12px; color: var(--text-light); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 4px; }
.stat-card .stat-value { font-size: 26px; font-weight: 700; color: var(--text); }
.stat-card .stat-sub { font-size: 12px; color: var(--text-xs); margin-top: 2px; }
.stat-card.positive .stat-value { color: var(--success); }
.stat-card.negative .stat-value { color: var(--danger); }

/* === TABLES === */
.table-wrap { overflow-x: auto; border-radius: var(--radius-sm); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; }
th { padding: 10px 14px; text-align: left; font-size: 11px; font-weight: 600; color: var(--text-light); text-transform: uppercase; letter-spacing: .05em; background: #f9fafb; border-bottom: 1px solid var(--border); }
td { padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #f8f9ff; }
td .actions { display: flex; gap: 4px; }
td code { font-size: 12px; background: #f3f4f6; padding: 2px 6px; border-radius: 3px; }

/* === FORMS === */
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 16px; }
.form-group { }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: #374151; }
.form-group .help-text { font-size: 12px; color: var(--text-light); margin-top: 4px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 9px 12px;
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    font-size: 14px; font-family: var(--font); outline: none;
    transition: border .15s, box-shadow .15s;
    background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(26,35,126,.1);
}
.form-group textarea { min-height: 80px; resize: vertical; }
.form-group input.error, .form-group select.error { border-color: var(--danger); }

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all .15s;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #048a5b; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #b45309; }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-outline-primary { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline-primary:hover { background: var(--primary); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-lg { padding: 12px 28px; font-size: 16px; }
.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: .6; cursor: not-allowed; }

/* === BADGES === */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}
.badge-success { background: var(--success-bg); color: #065f46; }
.badge-warning { background: var(--warning-bg); color: #92400e; }
.badge-danger { background: var(--danger-bg); color: #991b1b; }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-neutral { background: #f3f4f6; color: #6b7280; }

/* === TABS === */
.tabs { display: flex; gap: 0; border-bottom: 2px solid var(--border); margin-bottom: 24px; }
.tab {
    padding: 10px 24px;
    font-size: 14px; font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all .15s;
    user-select: none;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* === STEPS (Import wizard) === */
.steps { display: flex; gap: 0; margin-bottom: 32px; counter-reset: step; }
.step {
    flex: 1;
    text-align: center;
    position: relative;
    padding: 16px 12px 12px;
}
.step::before {
    content: '';
    position: absolute;
    top: 28px;
    left: 50%;
    right: -50%;
    height: 3px;
    background: var(--border);
    z-index: 0;
}
.step:last-child::before { display: none; }
.step .step-num {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--border);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700; font-size: 14px;
    margin: 0 auto 8px;
    position: relative;
    z-index: 1;
}
.step .step-label { font-size: 13px; color: var(--text-light); font-weight: 500; }
.step.active .step-num { background: var(--primary); color: #fff; }
.step.active .step-label { color: var(--primary); font-weight: 600; }
.step.active::before { background: var(--primary); }
.step.done .step-num { background: var(--success); color: #fff; }
.step.done .step-label { color: var(--success); }
.step.done::before { background: var(--success); }

/* === UPLOAD ZONE === */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 48px 32px;
    text-align: center;
    cursor: pointer;
    transition: all .2s;
    background: #fafbfc;
    margin-bottom: 20px;
}
.upload-zone:hover { border-color: var(--primary-light); background: #f0f2ff; }
.upload-zone.dragover { border-color: var(--primary); background: #e8eaff; border-style: solid; }
.upload-zone .zone-icon { font-size: 48px; margin-bottom: 12px; }
.upload-zone .zone-title { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.upload-zone .zone-desc { font-size: 14px; color: var(--text-light); margin-bottom: 12px; }
.upload-zone .zone-hint { font-size: 12px; color: var(--text-xs); }
.upload-zone.file-selected { border-color: var(--success); background: #f0fdf4; }
.upload-zone.file-selected .zone-icon { font-size: 48px; }
.upload-zone.file-selected .zone-icon { content: '✅'; }

/* === FORMAT SAMPLE === */
.format-sample {
    background: #1f2937;
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    color: #e5e7eb;
    overflow-x: auto;
    margin-bottom: 16px;
    line-height: 1.6;
}
.format-sample .header-row { color: #9ca3af; }
.format-sample .data-row { color: #a7f3d0; }
.format-sample .comment { color: #6b7280; font-style: italic; }
.format-sample .highlight { background: rgba(255,255,255,.1); border-radius: 2px; padding: 0 2px; }

/* === ALERTS === */
.alert { padding: 14px 18px; border-radius: var(--radius-sm); margin-bottom: 20px; font-size: 14px; display: flex; align-items: flex-start; gap: 10px; }
.alert .alert-icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.alert-success { background: var(--success-bg); color: #065f46; border: 1px solid #a7f3d0; }
.alert-danger { background: var(--danger-bg); color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: var(--warning-bg); color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: var(--info-bg); color: var(--info); border: 1px solid #bfdbfe; }

/* === EMPTY STATE === */
.empty-state { text-align: center; padding: 48px 24px; }
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state .empty-title { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.empty-state .empty-desc { font-size: 14px; color: var(--text-light); margin-bottom: 16px; }

/* === MODAL === */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,.5); z-index: 200;
    display: flex; align-items: center; justify-content: center;
    padding: 20px;
}
.modal { background: var(--card); border-radius: var(--radius); max-width: 500px; width: 100%; padding: 24px; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.modal h2 { font-size: 18px; font-weight: 600; margin-bottom: 16px; }
.modal p { color: var(--text-light); margin-bottom: 16px; }

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .sidebar { width: 0; overflow: hidden; }
    .main-content { margin-left: 0; padding: 16px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
}

/* === PRINT === */
@media print {
    .sidebar, .page-actions, .btn, .actions, .no-print, .page-header, .tabs { display: none !important; }
    .main-content { margin-left: 0; padding: 12px; }
    .card { box-shadow: none; border: 1px solid #ddd; break-inside: avoid; padding: 8px; margin-bottom: 8px; }
    .card-header { font-size: 13px; padding-bottom: 4px; margin-bottom: 4px; }
    table { font-size: 11px; }
    th, td { padding: 4px 6px; }
    body { font-size: 12px; }
    .print-header { display: block !important; text-align: center; margin-bottom: 16px; }
    .print-header h2 { font-size: 16px; margin-bottom: 2px; }
    .print-header p { font-size: 11px; color: #666; margin: 0; }
}
@media not print {
    .print-header { display: none; }