/* ===== MODERN GPIB ACCOUNTING SYSTEM ===== */
:root {
    --primary: #2c5aa0;
    --primary-dark: #1e3d72;
    --primary-light: #4a7bc8;
    --secondary: #6c757d;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
    --light: #f8f9fa;
    --dark: #343a40;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    line-height: 1.6;
    color: var(--gray-800);
}

/* ===== LOGIN PAGE ===== */
.login-body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.15);
}

.login-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 2.5rem 2rem;
    text-align: center;
    color: var(--white);
}

.login-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-header p {
    opacity: 0.9;
    font-size: 0.9rem;
}

.login-body-content {
    padding: 2.5rem 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
    transform: translateY(-2px);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1.5rem rgba(44, 90, 160, 0.3);
}

.btn-block {
    width: 100%;
}

/* ===== MAIN LAYOUT ===== */
.app-container {
    display: flex;
    min-height: 100vh;
    background: #f5f7fa;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: 280px;
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: var(--transition);
    z-index: 1000;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.sidebar-brand {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    padding: 0.5rem 1.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.6);
}

.nav-item {
    margin: 0.25rem 0;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
    border-left: 3px solid transparent;
    gap: 0.75rem;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border-left-color: rgba(255, 255, 255, 0.3);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    border-left-color: var(--white);
    font-weight: 600;
}

.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 0;
    background: #f5f7fa;
}

/* ===== TOP NAVBAR ===== */
.top-navbar {
    background: var(--white);
    padding: 1rem 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 999;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-title h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--gray-100);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    color: var(--gray-700);
    transition: var(--transition);
}

.user-info:hover {
    background: var(--gray-200);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 600;
    font-size: 0.9rem;
}

/* ===== CONTENT AREA ===== */
.content-area {
    padding: 2rem;
}

/* ===== CARDS ===== */
.card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: none;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    padding: 1.5rem;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
}

.card-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-body {
    padding: 1.5rem;
}

/* ===== STATS CARDS ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--white) 0%, #f8f9fa 100%);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.stat-card.income {
    border-left-color: var(--success);
}

.stat-card.expense {
    border-left-color: var(--danger);
}

.stat-card.warning {
    border-left-color: var(--warning);
}

.stat-header {
    display: flex;
    justify-content: between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.stat-card.income .stat-icon {
    background: linear-gradient(135deg, var(--success) 0%, #1e7e34 100%);
}

.stat-card.expense .stat-icon {
    background: linear-gradient(135deg, var(--danger) 0%, #c82333 100%);
}

.stat-card.warning .stat-icon {
    background: linear-gradient(135deg, var(--warning) 0%, #e0a800 100%);
}

.stat-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-800);
    margin: 0.5rem 0;
}

.stat-change {
    font-size: 0.875rem;
    font-weight: 600;
}

.stat-change.positive {
    color: var(--success);
}

.stat-change.negative {
    color: var(--danger);
}

/* ===== TABLES ===== */
.table-container {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
}

.table th {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 1rem;
    font-weight: 600;
    text-align: left;
    border: none;
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
    vertical-align: middle;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: var(--gray-50);
}

/* ===== BADGES ===== */
.badge {
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.badge-success {
    background: linear-gradient(135deg, var(--success) 0%, #1e7e34 100%);
    color: var(--white);
}

.badge-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #e0a800 100%);
    color: var(--dark);
}

.badge-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #c82333 100%);
    color: var(--white);
}

.badge-info {
    background: linear-gradient(135deg, var(--info) 0%, #138496 100%);
    color: var(--white);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    gap: 0.5rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1.5rem rgba(44, 90, 160, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #1e7e34 100%);
    color: var(--white);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #c82333 100%);
    color: var(--white);
}

.btn-outline-primary {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

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

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

/* ===== ALERTS ===== */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius-sm);
    border: none;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
    border-left: 4px solid var(--success);
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da 0%, #f1b0b7 100%);
    color: #721c24;
    border-left: 4px solid var(--danger);
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    color: #856404;
    border-left: 4px solid var(--warning);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .top-navbar {
        padding: 1rem;
    }
    
    .content-area {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .mobile-menu-btn {
        display: block !important;
    }
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--gray-700);
    cursor: pointer;
}

/* ===== UTILITIES ===== */
.text-primary { color: var(--primary) !important; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-warning { color: var(--warning) !important; }
.text-muted { color: var(--gray-600) !important; }

.bg-primary { background: var(--primary) !important; }
.bg-success { background: var(--success) !important; }
.bg-danger { background: var(--danger) !important; }
.bg-warning { background: var(--warning) !important; }

.shadow { box-shadow: var(--shadow) !important; }
.rounded { border-radius: var(--border-radius) !important; }

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}