@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --bg-color: #f8fafc;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--gray-800);
    line-height: 1.6;
}

/* Header Styles */
.header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.5rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-menu {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    cursor: pointer;
    font-weight: 600;
}

.user-dropdown {
    position: absolute;
    top: 50px;
    right: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    display: none;
    z-index: 1000;
}

.user-dropdown.show {
    display: block;
}

.user-dropdown a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--gray-700);
    text-decoration: none;
    border-bottom: 1px solid var(--gray-100);
}

.user-dropdown a:hover {
    background: var(--gray-50);
}

.user-dropdown a:last-child {
    border-bottom: none;
    color: var(--error-color);
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    min-height: calc(100vh - 140px);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    transition: all 0.2s ease;
}

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

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

.stat-title {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

.stat-icon {
    width: 40px;
    height: 40px;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.125rem;
}

.stat-icon.blue { background: var(--primary-color); }
.stat-icon.green { background: var(--success-color); }
.stat-icon.yellow { background: var(--warning-color); }
.stat-icon.red { background: var(--error-color); }

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.stat-change {
    font-size: 0.875rem;
    color: var(--gray-600);
}

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

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

/* Quick Actions */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.action-btn {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 0.75rem;
    padding: 1.25rem;
    text-align: center;
    text-decoration: none;
    color: var(--gray-700);
    transition: all 0.2s ease;
    display: block;
}

.action-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.action-btn i {
    display: block;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.action-btn span {
    font-weight: 500;
}

/* Cards */
.card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 1rem;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 1.25rem;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
}

.card-body {
    padding: 1.25rem;
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

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

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

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

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover {
    background: var(--gray-50);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: 0.5rem;
    border: 1px solid var(--gray-200);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.875rem;
}

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

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    padding: 0.5rem;
    z-index: 100;
}

.nav-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    text-decoration: none;
    color: var(--gray-600);
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.nav-item.active,
.nav-item:hover {
    color: var(--primary-color);
    background: var(--gray-50);
}

.nav-item i {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.nav-item span {
    font-size: 0.75rem;
    font-weight: 500;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    border: 1px solid;
}

.alert-success {
    background: rgb(16 185 129 / 0.1);
    border-color: var(--success-color);
    color: #065f46;
}

.alert-warning {
    background: rgb(245 158 11 / 0.1);
    border-color: var(--warning-color);
    color: #92400e;
}

.alert-error {
    background: rgb(239 68 68 / 0.1);
    border-color: var(--error-color);
    color: #991b1b;
}

.alert-info {
    background: rgb(59 130 246 / 0.1);
    border-color: var(--primary-color);
    color: #1e40af;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background: rgb(16 185 129 / 0.1);
    color: var(--success-color);
}

.badge-warning {
    background: rgb(245 158 11 / 0.1);
    color: var(--warning-color);
}

.badge-error {
    background: rgb(239 68 68 / 0.1);
    color: var(--error-color);
}

.badge-info {
    background: rgb(59 130 246 / 0.1);
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        padding: 1rem 0.5rem;
        margin-bottom: 80px;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mobile-nav {
        display: block;
    }
    
    .header-content {
        padding: 0 0.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .table-container {
        font-size: 0.875rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .stat-card {
        padding: 1rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .action-btn {
        padding: 1rem;
    }
    
    .action-btn i {
        font-size: 1.5rem;
    }
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--white);
    border-radius: 1rem;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }

.p-2 { padding: 0.5rem; }
.p-4 { padding: 1rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }

.hidden { display: none !important; }
.block { display: block !important; }
.flex { display: flex !important; }
.grid { display: grid !important; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-full { border-radius: 9999px; }

.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }