/* ==================== */
/* ROOT VARIABLES       */
/* ==================== */
:root {
    /* Light Theme (default) */
    --primary-color: #2563eb;
    --primary-light: #dbeafe;
    --primary-dark: #1d4ed8;
    
    --secondary-color: #6b7280;
    --secondary-light: #f3f4f6;
    --secondary-dark: #4b5563;
    
    --success-color: #059669;
    --success-light: #d1fae5;
    --success-dark: #047857;
    
    --warning-color: #d97706;
    --warning-light: #fef3c7;
    --warning-dark: #b45309;
    
    --danger-color: #dc2626;
    --danger-light: #fee2e2;
    --danger-dark: #b91c1c;
    
    --info-color: #0ea5e9;
    --info-light: #e0f2fe;
    --info-dark: #0284c7;
    
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --bg-tertiary: #e5e7eb;
    
    --border-color: #e5e7eb;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    --card-bg: #ffffff;
    --card-border: #e5e7eb;
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    
    --input-bg: #ffffff;
    --input-border: #d1d5db;
    --input-text: #111827;
    
    --table-header-bg: #f9fafb;
    --table-row-hover: rgba(37, 99, 235, 0.05);
    
    --sidebar-bg: #f8fafc;
    --sidebar-border: #e2e8f0;
    
    --navbar-bg: #ffffff;
    --navbar-border: #e5e7eb;
    
    --progress-bg: #e5e7eb;
    
    --transition-speed: 0.3s;
    --border-radius: 0.5rem;
    --border-radius-sm: 0.375rem;
    --border-radius-lg: 0.75rem;
}

/* ==================== */
/* DARK THEME VARIABLES */
/* ==================== */
[data-theme="dark"] {
    --primary-color: #60a5fa;
    --primary-light: #1e3a8a;
    --primary-dark: #3b82f6;
    
    --secondary-color: #94a3b8;
    --secondary-light: #1e293b;
    --secondary-dark: #64748b;
    
    --success-color: #34d399;
    --success-light: #064e3b;
    --success-dark: #10b981;
    
    --warning-color: #fbbf24;
    --warning-light: #78350f;
    --warning-dark: #f59e0b;
    
    --danger-color: #f87171;
    --danger-light: #7f1d1d;
    --danger-dark: #ef4444;
    
    --info-color: #38bdf8;
    --info-light: #0c4a6e;
    --info-dark: #0ea5e9;
    
    --dark-color: #0f172a;
    --light-color: #1e293b;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    
    --border-color: #334155;
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    --card-bg: #1e293b;
    --card-border: #334155;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    
    --input-bg: #334155;
    --input-border: #475569;
    --input-text: #f1f5f9;
    
    --table-header-bg: #1e293b;
    --table-row-hover: rgba(96, 165, 250, 0.1);
    
    --sidebar-bg: #1e293b;
    --sidebar-border: #334155;
    
    --navbar-bg: #1e293b;
    --navbar-border: #334155;
    
    --progress-bg: #475569;
}

/* ==================== */
/* GLOBAL STYLES        */
/* ==================== */
* {
    transition: background-color var(--transition-speed) ease,
                color var(--transition-speed) ease,
                border-color var(--transition-speed) ease,
                box-shadow var(--transition-speed) ease;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Inter', sans-serif;
    min-height: 100vh;
    line-height: 1.6;
}

/* ==================== */
/* NAVBAR               */
/* ==================== */
.navbar {
    background-color: var(--navbar-bg) !important;
    border-bottom: 1px solid var(--navbar-border);
    box-shadow: 0 1px 3px var(--shadow-color);
    padding: 0.75rem 0;
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
    font-size: 1.25rem;
}

.navbar-brand i {
    color: var(--primary-color);
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.theme-toggle-btn:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
    transform: rotate(15deg);
}

/* ==================== */
/* SIDEBAR              */
/* ==================== */
.sidebar {
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    min-height: calc(100vh - 64px);
    position: sticky;
    top: 64px;
    overflow-y: auto;
}

.sidebar .nav-link {
    color: var(--text-secondary);
    padding: 0.75rem 1rem;
    margin: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    transition: all var(--transition-speed) ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar .nav-link:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
    transform: translateX(5px);
}

.sidebar .nav-link.active {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.sidebar .nav-link i {
    width: 20px;
    text-align: center;
}

.sidebar-heading {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
    padding: 1rem 1rem 0.5rem;
    margin-top: 1rem;
}

/* ==================== */
/* CARDS                */
/* ==================== */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed) ease, 
                box-shadow var(--transition-speed) ease;
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--shadow-color);
}

.card-header {
    background-color: rgba(0, 0, 0, 0.02);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

[data-theme="dark"] .card-header {
    background-color: rgba(255, 255, 255, 0.02);
}

.card-body {
    padding: 1.25rem;
}

/* Stat Cards */
.stat-card {
    border: none;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.stat-icon.investment {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.stat-icon.expense {
    background-color: var(--warning-light);
    color: var(--warning-color);
}

.stat-icon.profit {
    background-color: var(--success-light);
    color: var(--success-color);
}

.stat-icon.balance {
    background-color: var(--info-light);
    color: var(--info-color);
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ==================== */
/* TABLES               */
/* ==================== */
.table {
    color: var(--text-primary);
    margin-bottom: 0;
}

.table thead th {
    background-color: var(--table-header-bg);
    border-bottom: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    padding: 0.75rem 1rem;
    white-space: nowrap;
}

.table tbody td {
    padding: 0.75rem 1rem;
    border-color: var(--border-color);
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: var(--table-row-hover) !important;
}

/* ==================== */
/* FORMS                */
/* ==================== */
.form-control, .form-select {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--input-text);
    border-radius: var(--border-radius-sm);
    padding: 0.5rem 0.75rem;
    transition: all var(--transition-speed) ease;
}

.form-control:focus, .form-select:focus {
    background-color: var(--input-bg);
    border-color: var(--primary-color);
    color: var(--input-text);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

.form-label {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* ==================== */
/* BUTTONS              */
/* ==================== */
.btn {
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all var(--transition-speed) ease;
    border: 1px solid transparent;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.btn:active {
    transform: translateY(0);
}

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

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

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: transparent;
}

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

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

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

.btn-outline-warning {
    color: var(--warning-color);
    border-color: var(--warning-color);
    background: transparent;
}

.btn-outline-warning:hover {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
    color: white;
}

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

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

/* ==================== */
/* BADGES               */
/* ==================== */
.badge {
    padding: 0.35em 0.65em;
    font-weight: 600;
    border-radius: 0.375rem;
    font-size: 0.75em;
}

.badge.bg-primary {
    background-color: var(--primary-color) !important;
}

.badge.bg-success {
    background-color: var(--success-color) !important;
}

.badge.bg-warning {
    background-color: var(--warning-color) !important;
}

.badge.bg-danger {
    background-color: var(--danger-color) !important;
}

.badge.bg-info {
    background-color: var(--info-color) !important;
}

/* ==================== */
/* ALERTS               */
/* ==================== */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.25rem;
    border-left: 4px solid;
}

.alert-success {
    background-color: var(--success-light);
    color: var(--success-color);
    border-left-color: var(--success-color);
}

.alert-danger {
    background-color: var(--danger-light);
    color: var(--danger-color);
    border-left-color: var(--danger-color);
}

.alert-warning {
    background-color: var(--warning-light);
    color: var(--warning-color);
    border-left-color: var(--warning-color);
}

.alert-info {
    background-color: var(--info-light);
    color: var(--info-color);
    border-left-color: var(--info-color);
}

.alert-fixed {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1060;
    min-width: 300px;
    max-width: 400px;
    animation: slideInRight 0.3s ease-out;
    box-shadow: 0 4px 12px var(--shadow-color);
}

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

/* ==================== */
/* PROGRESS BARS        */
/* ==================== */
.progress {
    background-color: var(--progress-bg);
    border-radius: 1rem;
    overflow: hidden;
    height: 0.5rem;
}

.progress-bar {
    border-radius: 1rem;
    transition: width 0.6s ease;
}

/* ==================== */
/* CHART CONTAINERS     */
/* ==================== */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* ==================== */
/* UTILITY CLASSES      */
/* ==================== */
.text-success {
    color: var(--success-color) !important;
}

.text-danger {
    color: var(--danger-color) !important;
}

.text-warning {
    color: var(--warning-color) !important;
}

.text-primary {
    color: var(--primary-color) !important;
}

.text-muted {
    color: var(--text-muted) !important;
}

.bg-light {
    background-color: var(--bg-secondary) !important;
}

.border {
    border-color: var(--border-color) !important;
}

/* ==================== */
/* DROPDOWN MENUS       */
/* ==================== */
.dropdown-menu {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    box-shadow: 0 10px 25px var(--shadow-color);
}

.dropdown-item {
    color: var(--text-primary);
    padding: 0.5rem 1rem;
}

.dropdown-item:hover, .dropdown-item:focus {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
}

/* ==================== */
/* PAGINATION           */
/* ==================== */
.page-link {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.page-link:hover {
    background-color: var(--bg-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* ==================== */
/* LIST GROUPS          */
/* ==================== */
.list-group-item {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.list-group-item:hover {
    background-color: var(--bg-secondary);
}

/* ==================== */
/* MODALS               */
/* ==================== */
.modal-content {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
}

.modal-header {
    border-bottom-color: var(--border-color);
}

.modal-footer {
    border-top-color: var(--border-color);
}

/* ==================== */
/* RESPONSIVE           */
/* ==================== */
@media (max-width: 768px) {
    .sidebar {
        position: static;
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid var(--sidebar-border);
    }
    
    .alert-fixed {
        left: 20px;
        right: 20px;
        max-width: none;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
}

@media (max-width: 576px) {
    .card-body {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.375rem 0.75rem;
        font-size: 0.875rem;
    }
    
    .stat-icon {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
}

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

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* ==================== */
/* SCROLLBAR            */
/* ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* ==================== */
/* PRINT STYLES         */
/* ==================== */
@media print {
    .sidebar, .navbar, .btn, .theme-toggle-btn {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .card {
        border: 1px solid #ddd !important;
        box-shadow: none !important;
    }
}