/* ══════════════════════════════════════════════════════════════
   CashFlow Design System
   ══════════════════════════════════════════════════════════════ */

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
    /* Primary */
    --cf-primary: #2563EB;
    --cf-primary-hover: #1D4ED8;
    --cf-primary-light: #DBEAFE;
    --cf-primary-subtle: #EFF6FF;

    /* Semantic */
    --cf-success: #10B981;
    --cf-success-light: #D1FAE5;
    --cf-danger: #EF4444;
    --cf-danger-light: #FEE2E2;
    --cf-warning: #F59E0B;
    --cf-warning-light: #FEF3C7;
    --cf-info: #3B82F6;
    --cf-info-light: #DBEAFE;
    --cf-purple: #7C3AED;
    --cf-purple-light: #EDE9FE;
    --cf-teal: #0D9488;
    --cf-teal-light: #CCFBF1;

    /* Neutral */
    --cf-dark: #1E293B;
    --cf-dark-soft: #334155;
    --cf-muted: #64748B;
    --cf-border: #E2E8F0;
    --cf-bg: #F8FAFC;
    --cf-surface: #FFFFFF;
    --cf-surface-hover: #F1F5F9;

    /* Sidebar */
    --cf-sidebar-bg: #1E293B;
    --cf-sidebar-width: 250px;
    --cf-sidebar-collapsed-width: 68px;

    /* Typography */
    --cf-font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Radii */
    --cf-radius-sm: 0.375rem;
    --cf-radius: 0.5rem;
    --cf-radius-md: 0.75rem;
    --cf-radius-lg: 1rem;
    --cf-radius-xl: 1.25rem;

    /* Shadows */
    --cf-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --cf-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --cf-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --cf-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);

    /* Transitions */
    --cf-transition: 0.2s ease;
    --cf-transition-slow: 0.3s ease;
}

/* ── Dark Mode ─────────────────────────────────────────────── */
[data-theme="dark"] {
    --cf-bg: #0F172A;
    --cf-surface: #1E293B;
    --cf-surface-hover: #334155;
    --cf-dark: #F1F5F9;
    --cf-dark-soft: #CBD5E1;
    --cf-muted: #94A3B8;
    --cf-border: #334155;
    --cf-sidebar-bg: #0F172A;
    --cf-shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --cf-shadow: 0 1px 3px rgba(0,0,0,0.4);
    --cf-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --cf-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4);
    --cf-primary-light: rgba(37, 99, 235, 0.2);
    --cf-primary-subtle: rgba(37, 99, 235, 0.1);
    --cf-success-light: rgba(16, 185, 129, 0.15);
    --cf-danger-light: rgba(239, 68, 68, 0.15);
    --cf-warning-light: rgba(245, 158, 11, 0.15);
}

/* ── Base ──────────────────────────────────────────────────── */
body {
    font-family: var(--cf-font);
    background-color: var(--cf-bg);
    color: var(--cf-dark);
}

a { transition: color var(--cf-transition); }

/* ── Layout: Sidebar ───────────────────────────────────────── */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--cf-sidebar-width);
    height: 100vh;
    background: var(--cf-sidebar-bg);
    color: #fff;
    z-index: 1050;
    transition: width var(--cf-transition-slow), transform var(--cf-transition-slow);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 2px; }

.sidebar .brand {
    padding: 1.25rem;
    font-size: 1.25rem;
    font-weight: 700;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}
.sidebar .brand .badge { font-size: 0.6rem; padding: 0.2em 0.5em; }

.sidebar .nav-section {
    padding: 1rem 1.25rem 0.35rem;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255,255,255,0.35);
    white-space: nowrap;
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.65);
    padding: 0.6rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    transition: all var(--cf-transition);
    border-left: 3px solid transparent;
    white-space: nowrap;
    text-decoration: none;
}
.sidebar .nav-link:hover {
    color: #fff;
    background: rgba(255,255,255,0.07);
}
.sidebar .nav-link.active {
    color: #fff;
    background: rgba(255,255,255,0.1);
    border-left-color: var(--cf-primary);
}
.sidebar .nav-link i { width: 20px; text-align: center; flex-shrink: 0; }

.sidebar .nav-divider {
    height: 1px;
    background: rgba(255,255,255,0.06);
    margin: 0.5rem 1.25rem;
}

.sidebar .back-link {
    display: block;
    padding: 0.75rem 1.25rem;
    color: rgba(255,255,255,0.5);
    text-decoration: none;
    font-size: 0.8rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    margin-top: auto;
}
.sidebar .back-link:hover { color: #fff; background: rgba(255,255,255,0.05); }

/* Sidebar collapse toggle */
.sidebar-toggle {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    cursor: pointer;
    color: rgba(255,255,255,0.4);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: color var(--cf-transition);
    background: none;
    border-left: none;
    border-right: none;
    border-bottom: none;
    width: 100%;
    text-align: left;
}
.sidebar-toggle:hover { color: rgba(255,255,255,0.7); }
.sidebar-toggle i { width: 20px; text-align: center; }

/* Collapsed state */
.sidebar.collapsed { width: var(--cf-sidebar-collapsed-width); }
.sidebar.collapsed .brand-text,
.sidebar.collapsed .nav-link span,
.sidebar.collapsed .nav-section,
.sidebar.collapsed .sidebar-toggle span,
.sidebar.collapsed .back-link span { display: none; }
.sidebar.collapsed .brand { justify-content: center; padding: 1.25rem 0.5rem; }
.sidebar.collapsed .nav-link { justify-content: center; padding: 0.6rem 0; border-left: none; }
.sidebar.collapsed .nav-divider { margin: 0.5rem 0.75rem; }
.sidebar.collapsed .sidebar-toggle { justify-content: center; }
.sidebar.collapsed + .main-content { margin-left: var(--cf-sidebar-collapsed-width); }

/* ── Layout: Main Content ──────────────────────────────────── */
.main-content {
    margin-left: var(--cf-sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--cf-transition-slow);
    background: var(--cf-bg);
}

.top-navbar {
    background: var(--cf-surface);
    border-bottom: 1px solid var(--cf-border);
    padding: 0.75rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.content-area { padding: 1.5rem; }

/* ── Stat Cards ────────────────────────────────────────────── */
.stat-card {
    background: var(--cf-surface);
    border-radius: var(--cf-radius-md);
    padding: 1.25rem;
    border: 1px solid var(--cf-border);
    transition: box-shadow var(--cf-transition);
}
.stat-card:hover { box-shadow: var(--cf-shadow-md); }
.stat-card .stat-value { font-size: 1.5rem; font-weight: 700; }
.stat-card .stat-label {
    font-size: 0.75rem;
    color: var(--cf-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}
.stat-card .stat-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--cf-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.stat-card .stat-trend {
    font-size: 0.8rem;
}

/* ── Icon Circles ─────────────────────────────────────────── */
.icon-circle {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.icon-circle-lg {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

/* ── Cards ─────────────────────────────────────────────────── */
.card {
    background: var(--cf-surface);
    border-color: var(--cf-border);
    border-radius: var(--cf-radius-md);
}
.card-header {
    background: var(--cf-surface);
    border-bottom-color: var(--cf-border);
}

/* ── Tables ────────────────────────────────────────────────── */
.table-card {
    background: var(--cf-surface);
    border-radius: var(--cf-radius-md);
    border: 1px solid var(--cf-border);
    overflow: hidden;
}
.table-card .card-header {
    background: var(--cf-surface);
    border-bottom: 1px solid var(--cf-border);
    padding: 1rem 1.25rem;
    font-weight: 600;
}
.table-card .table { margin-bottom: 0; }
.table-card .table th {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--cf-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--cf-border);
}
.table-card .table td { vertical-align: middle; font-size: 0.875rem; }

.table > :not(caption) > * > * {
    background-color: var(--cf-surface);
    color: var(--cf-dark);
    border-bottom-color: var(--cf-border);
}

/* ── Badges ────────────────────────────────────────────────── */
.badge-flow-income { background-color: var(--cf-success-light); color: #065F46; }
.badge-flow-expense { background-color: var(--cf-danger-light); color: #991B1B; }
.badge-flow-transfer { background-color: var(--cf-info-light); color: #1E40AF; }

[data-theme="dark"] .badge-flow-income { color: #6EE7B7; }
[data-theme="dark"] .badge-flow-expense { color: #FCA5A5; }
[data-theme="dark"] .badge-flow-transfer { color: #93C5FD; }

.badge-status { font-size: 0.7rem; padding: 0.3em 0.6em; border-radius: 0.35rem; font-weight: 500; }

/* ── Text Utilities ────────────────────────────────────────── */
.text-positive { color: var(--cf-success) !important; }
.text-negative { color: var(--cf-danger) !important; }
.text-cf-muted { color: var(--cf-muted); }

/* ── Buttons ───────────────────────────────────────────────── */
.btn-admin {
    background: var(--cf-primary);
    color: #fff;
    border: none;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-radius: var(--cf-radius);
}
.btn-admin:hover { background: var(--cf-primary-hover); color: #fff; }

/* ── Filter Bar ────────────────────────────────────────────── */
.filter-bar {
    background: var(--cf-surface);
    border-radius: var(--cf-radius-md);
    border: 1px solid var(--cf-border);
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}
.filter-bar .form-control,
.filter-bar .form-select {
    font-size: 0.875rem;
    border-color: var(--cf-border);
    background-color: var(--cf-surface);
    color: var(--cf-dark);
}

/* ── Forms ─────────────────────────────────────────────────── */
.form-control, .form-select {
    background-color: var(--cf-surface);
    border-color: var(--cf-border);
    color: var(--cf-dark);
}
.form-control:focus, .form-select:focus {
    border-color: var(--cf-primary);
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.15);
    background-color: var(--cf-surface);
    color: var(--cf-dark);
}
.form-label { font-weight: 500; font-size: 0.875rem; color: var(--cf-dark); }
.form-text { color: var(--cf-muted); font-size: 0.8rem; }

/* ── Alerts (dark mode) ────────────────────────────────────── */
[data-theme="dark"] .alert { border: none; }

/* ── Empty State ───────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}
.empty-state-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--cf-surface-hover);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}
.empty-state-icon i { font-size: 1.75rem; color: var(--cf-muted); }
.empty-state h5 { font-weight: 600; color: var(--cf-dark); }
.empty-state p { color: var(--cf-muted); max-width: 360px; margin: 0 auto; }

/* ── Page Header ───────────────────────────────────────────── */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

/* ── User Avatar ───────────────────────────────────────────── */
.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    flex-shrink: 0;
}

/* ── Notification Badge ────────────────────────────────────── */
.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    font-size: 0.6rem;
    line-height: 18px;
    text-align: center;
    border-radius: 9px;
    padding: 0 4px;
}

/* ── Breadcrumbs ───────────────────────────────────────────── */
.breadcrumb {
    font-size: 0.8rem;
    margin-bottom: 0;
    background: none;
    padding: 0;
}
.breadcrumb-item a { color: var(--cf-muted); text-decoration: none; }
.breadcrumb-item a:hover { color: var(--cf-primary); }
.breadcrumb-item.active { color: var(--cf-muted); }

/* ── Notification Type Colors ──────────────────────────────── */
.notif-icon-bill_due, .notif-icon-bill_overdue { color: var(--cf-warning); }
.notif-icon-goal_achieved { color: var(--cf-success); }
.notif-icon-goal_milestone { color: var(--cf-primary); }
.notif-icon-low_balance { color: var(--cf-danger); }
.notif-icon-sync_error { color: var(--cf-danger); }
.notif-icon-system { color: var(--cf-info); }

.notif-unread {
    border-left: 3px solid var(--cf-primary);
    background: var(--cf-primary-subtle);
}

/* ── Progress bars ─────────────────────────────────────────── */
.progress {
    background-color: var(--cf-surface-hover);
    border-radius: var(--cf-radius);
}

/* ── List Group Dark Mode ──────────────────────────────────── */
[data-theme="dark"] .list-group-item {
    background-color: var(--cf-surface);
    border-color: var(--cf-border);
    color: var(--cf-dark);
}
[data-theme="dark"] .list-group-item-action:hover {
    background-color: var(--cf-surface-hover);
    color: var(--cf-dark);
}

/* ── Mobile Bottom Nav ─────────────────────────────────────── */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--cf-surface);
    border-top: 1px solid var(--cf-border);
    z-index: 1050;
    padding: 0.5rem 0;
}
.mobile-nav a {
    flex: 1;
    text-align: center;
    color: var(--cf-muted);
    text-decoration: none;
    font-size: 0.65rem;
    padding: 0.25rem;
    transition: color var(--cf-transition);
}
.mobile-nav a.active { color: var(--cf-primary); }
.mobile-nav a i { display: block; font-size: 1.15rem; margin-bottom: 0.15rem; }

/* ── Sidebar Overlay ───────────────────────────────────────── */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1040;
    display: none;
    backdrop-filter: blur(2px);
}
.sidebar-overlay.show { display: block; }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.show { transform: translateX(0); }
    .sidebar.collapsed { width: var(--cf-sidebar-width); } /* no collapse on mobile */
    .main-content { margin-left: 0 !important; padding-bottom: 70px; }
    .mobile-nav { display: flex; }
    .content-area { padding: 1rem; }
}

@media (max-width: 576px) {
    .stat-card .stat-value { font-size: 1.2rem; }
    .table { font-size: 0.85rem; }
    .card-header { padding: 0.75rem; }
    .card-body { padding: 0.75rem; }
}

/* ── Loading / Spinner ─────────────────────────────────────── */
.btn-loading {
    pointer-events: none;
    opacity: 0.75;
}

/* ── Toast container ───────────────────────────────────────── */
.toast-container-cf {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 1090;
}