/* ============================================================
   bluLedger v1.0 — Design System
   ============================================================ */

:root {
    --bl-bg: #f5f6f8;
    --bl-surface: #ffffff;
    --bl-surface-2: #fafbfc;
    --bl-border: #e5e7eb;
    --bl-border-strong: #d1d5db;
    --bl-text: #111827;
    --bl-text-muted: #6b7280;
    --bl-text-faint: #9ca3af;

    --bl-primary: #1e3a8a;
    --bl-primary-hover: #1e40af;
    --bl-accent: #0ea5e9;

    --bl-success: #047857;
    --bl-success-bg: #d1fae5;
    --bl-warning: #b45309;
    --bl-warning-bg: #fef3c7;
    --bl-danger: #b91c1c;
    --bl-danger-bg: #fee2e2;
    --bl-info: #1e40af;
    --bl-info-bg: #dbeafe;

    --bl-sidebar-bg: #0f172a;
    --bl-sidebar-text: #cbd5e1;
    --bl-sidebar-text-muted: #64748b;
    --bl-sidebar-active: #1e293b;
    --bl-sidebar-active-text: #ffffff;
    --bl-sidebar-accent: #38bdf8;

    --bl-radius: 8px;
    --bl-radius-sm: 4px;
    --bl-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --bl-shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
    --bl-shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.1);

    --bl-sidebar-w: 260px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    color: var(--bl-text);
    background: var(--bl-bg);
    -webkit-font-smoothing: antialiased;
}

/* ============== Layout ============== */
.app-wrapper { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--bl-sidebar-w);
    background: var(--bl-sidebar-bg);
    color: var(--bl-sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 100;
    overflow-y: auto;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 22px;
    border-bottom: 1px solid #1e293b;
}
.brand-mark {
    width: 38px; height: 38px;
    background: linear-gradient(135deg, #38bdf8, #0ea5e9);
    color: #0f172a;
    border-radius: 8px;
    display: grid; place-items: center;
    font-weight: 800; font-size: 16px;
    letter-spacing: -0.5px;
}
.brand-name { color: white; font-weight: 600; font-size: 15px; }
.brand-version { color: var(--bl-sidebar-text-muted); font-size: 11px; letter-spacing: 0.5px; }

.sidebar-nav { flex: 1; padding: 12px 12px 24px; }
.nav-section {
    text-transform: uppercase;
    color: var(--bl-sidebar-text-muted);
    font-size: 10.5px;
    letter-spacing: 1px;
    font-weight: 600;
    padding: 16px 12px 8px;
}
.nav-link {
    display: flex; align-items: center; gap: 12px;
    color: var(--bl-sidebar-text);
    text-decoration: none;
    padding: 9px 12px;
    border-radius: 6px;
    font-size: 13.5px;
    transition: background 0.12s, color 0.12s;
}
.nav-link i { font-size: 16px; width: 18px; text-align: center; opacity: 0.85; }
.nav-link:hover { background: var(--bl-sidebar-active); color: white; }
.nav-link.active {
    background: var(--bl-sidebar-active);
    color: var(--bl-sidebar-active-text);
    box-shadow: inset 3px 0 0 var(--bl-sidebar-accent);
}

.sidebar-footer {
    padding: 14px;
    border-top: 1px solid #1e293b;
}
.user-card {
    display: flex; align-items: center; gap: 10px;
    padding: 8px;
    border-radius: 8px;
    background: #1e293b;
}
.user-avatar {
    width: 34px; height: 34px;
    background: linear-gradient(135deg, #38bdf8, #0ea5e9);
    color: #0f172a;
    border-radius: 50%;
    display: grid; place-items: center;
    font-weight: 700; font-size: 12px;
}
.user-info { flex: 1; min-width: 0; }
.user-name { color: white; font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { color: var(--bl-sidebar-text-muted); font-size: 11px; text-transform: capitalize; }
.logout-btn { color: var(--bl-sidebar-text-muted); padding: 6px; border-radius: 4px; text-decoration: none; }
.logout-btn:hover { color: white; background: rgba(255,255,255,0.05); }

.main-content {
    flex: 1;
    margin-left: var(--bl-sidebar-w);
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    background: white;
    border-bottom: 1px solid var(--bl-border);
    padding: 16px 28px;
    display: flex; align-items: center; justify-content: space-between;
    position: sticky; top: 0; z-index: 50;
}
.page-title { font-size: 18px; font-weight: 600; margin: 0; color: var(--bl-text); }
.topbar-actions { display: flex; align-items: center; gap: 16px; }
.sidebar-toggle { background: none; border: none; font-size: 22px; color: var(--bl-text); }

.content-area { padding: 24px 28px 60px; }

/* ============== Cards ============== */
.bl-card {
    background: var(--bl-surface);
    border: 1px solid var(--bl-border);
    border-radius: var(--bl-radius);
    box-shadow: var(--bl-shadow-sm);
    margin-bottom: 20px;
}
.bl-card-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--bl-border);
    display: flex; justify-content: space-between; align-items: center;
}
.bl-card-title { font-size: 14px; font-weight: 600; margin: 0; color: var(--bl-text); }
.bl-card-body { padding: 20px; }

/* ============== KPI Cards ============== */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.kpi-card {
    background: var(--bl-surface);
    border: 1px solid var(--bl-border);
    border-radius: var(--bl-radius);
    padding: 18px 20px;
    position: relative;
    overflow: hidden;
}
.kpi-card::before {
    content: '';
    position: absolute;
    inset: 0 auto 0 0;
    width: 3px;
    background: var(--bl-primary);
}
.kpi-card.kpi-success::before { background: var(--bl-success); }
.kpi-card.kpi-warning::before { background: var(--bl-warning); }
.kpi-card.kpi-danger::before { background: var(--bl-danger); }
.kpi-card.kpi-info::before { background: var(--bl-info); }

.kpi-label {
    font-size: 11.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--bl-text-muted);
    margin-bottom: 8px;
}
.kpi-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--bl-text);
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}
.kpi-sub {
    font-size: 12px;
    color: var(--bl-text-muted);
    margin-top: 6px;
}

/* ============== Tables ============== */
.bl-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.bl-table thead th {
    background: var(--bl-surface-2);
    color: var(--bl-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.5px;
    padding: 11px 16px;
    text-align: left;
    border-bottom: 1px solid var(--bl-border);
    white-space: nowrap;
}
.bl-table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--bl-border);
    vertical-align: middle;
}
.bl-table tbody tr:hover { background: var(--bl-surface-2); }
.bl-table tbody tr:last-child td { border-bottom: none; }
.bl-table .text-right, .bl-table .text-end { text-align: right; }
.bl-table .num { text-align: right; font-variant-numeric: tabular-nums; }

/* ============== Forms ============== */
.form-label { font-size: 13px; font-weight: 500; margin-bottom: 6px; color: var(--bl-text); }
.form-control, .form-select {
    border-radius: 6px;
    border: 1px solid var(--bl-border-strong);
    padding: 8px 12px;
    font-size: 13.5px;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.form-control:focus, .form-select:focus {
    border-color: var(--bl-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
    outline: none;
}

/* ============== Buttons ============== */
.btn {
    border-radius: 6px;
    font-size: 13.5px;
    font-weight: 500;
    padding: 8px 16px;
    transition: all 0.15s;
}
.btn-primary {
    background: var(--bl-primary);
    border-color: var(--bl-primary);
}
.btn-primary:hover {
    background: var(--bl-primary-hover);
    border-color: var(--bl-primary-hover);
}
.btn-sm { padding: 5px 10px; font-size: 12.5px; }

/* ============== Status Badges ============== */
.badge {
    font-size: 11px;
    font-weight: 600;
    padding: 4px 9px;
    border-radius: 12px;
    letter-spacing: 0.2px;
}
.bg-success { background: var(--bl-success-bg) !important; color: var(--bl-success) !important; }
.bg-warning { background: var(--bl-warning-bg) !important; color: var(--bl-warning) !important; }
.bg-danger { background: var(--bl-danger-bg) !important; color: var(--bl-danger) !important; }
.bg-info { background: var(--bl-info-bg) !important; color: var(--bl-info) !important; }
.bg-secondary { background: #f1f5f9 !important; color: #475569 !important; }

/* ============== Alerts ============== */
.alert {
    border-radius: 6px;
    border: none;
    padding: 12px 16px;
    font-size: 13.5px;
}
.alert-success { background: var(--bl-success-bg); color: var(--bl-success); }
.alert-warning { background: var(--bl-warning-bg); color: var(--bl-warning); }
.alert-danger  { background: var(--bl-danger-bg); color: var(--bl-danger); }
.alert-info    { background: var(--bl-info-bg); color: var(--bl-info); }

/* ============== Page header (within content) ============== */
.page-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}
.page-header h2 { font-size: 20px; font-weight: 600; margin: 0; }
.page-header .subtitle { font-size: 13px; color: var(--bl-text-muted); margin-top: 2px; }

/* ============== Filter bar ============== */
.filter-bar {
    display: flex; gap: 10px; flex-wrap: wrap;
    background: var(--bl-surface);
    padding: 14px 16px;
    border: 1px solid var(--bl-border);
    border-radius: var(--bl-radius);
    margin-bottom: 16px;
}

/* ============== Login page ============== */
.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    padding: 20px;
}
.login-card {
    background: white;
    width: 100%;
    max-width: 400px;
    padding: 40px 36px;
    border-radius: 12px;
    box-shadow: var(--bl-shadow-lg);
}
.login-brand {
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 32px;
}
.login-brand .brand-mark {
    width: 44px; height: 44px;
    font-size: 18px;
}
.login-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--bl-text);
}
.login-subtitle { color: var(--bl-text-muted); font-size: 13px; }

/* ============== Document view ============== */
.doc-meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px 24px;
    margin-bottom: 24px;
    padding: 16px;
    background: var(--bl-surface-2);
    border-radius: var(--bl-radius);
    border: 1px solid var(--bl-border);
}
.doc-meta-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--bl-text-muted);
    margin-bottom: 4px;
}
.doc-meta-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--bl-text);
}

/* ============== Exception list ============== */
.exception-list { padding: 0; margin: 0; list-style: none; }
.exception-item {
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 8px;
    font-size: 13px;
    border-left: 3px solid;
}
.exception-error { background: var(--bl-danger-bg); border-left-color: var(--bl-danger); color: var(--bl-danger); }
.exception-warning { background: var(--bl-warning-bg); border-left-color: var(--bl-warning); color: var(--bl-warning); }

/* ============== Empty state ============== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--bl-text-muted);
}
.empty-state i {
    font-size: 48px;
    color: var(--bl-text-faint);
    margin-bottom: 12px;
}
.empty-state h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--bl-text);
    margin-bottom: 6px;
}

/* ============== Mobile ============== */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); transition: transform 0.2s; }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .content-area { padding: 16px; }
    .topbar { padding: 12px 16px; }
}

/* Print */
@media print {
    .sidebar, .topbar, .no-print { display: none !important; }
    .main-content { margin: 0; }
    .content-area { padding: 0; }
}