/* =================== CSS Variables =================== */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --sidebar-width: 260px;
    --header-height: 70px;
}

/* =================== Global Styles =================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* =================== Admin Wrapper =================== */
.admin-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* =================== Header =================== */
.admin-header {
    background: var(--card-bg);
    height: var(--header-height);
    padding: 0 2rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.sidebar-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    display: none;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.header-search {
    position: relative;
    display: flex;
    align-items: center;
}

.header-search i {
    position: absolute;
    left: 1rem;
    color: var(--text-secondary);
}

.header-search input {
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 300px;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.header-search input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.header-notifications {
    position: relative;
    cursor: pointer;
    font-size: 1.3rem;
    color: var(--text-secondary);
}

.notification-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--danger-color);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
}

.header-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: background 0.3s;
}

.header-profile:hover {
    background: var(--bg-color);
}

.profile-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.profile-name {
    font-weight: 500;
    color: var(--text-primary);
}

/* =================== Container =================== */
.admin-container {
    display: flex;
    flex: 1;
}

/* =================== Sidebar =================== */
.admin-sidebar {
    width: var(--sidebar-width);
    background: var(--card-bg);
    box-shadow: var(--shadow);
    height: calc(100vh - var(--header-height));
    position: sticky;
    top: var(--header-height);
    overflow-y: auto;
}

.sidebar-nav {
    padding: 1.5rem 0;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.nav-menu {
    list-style: none;
    flex: 1;
}

.nav-item {
    margin: 0.25rem 1rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    border-radius: 8px;
    transition: all 0.3s;
    color: var(--text-secondary);
}

.nav-link i {
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
}

.nav-link:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

.nav-item.active .nav-link {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    font-weight: 600;
}

.sidebar-footer {
    padding: 0 1rem;
    margin-top: auto;
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    border-radius: 8px;
    transition: all 0.3s;
    color: var(--danger-color);
    font-weight: 500;
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* =================== Main Content =================== */
.admin-main {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* =================== Footer =================== */
.admin-footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* =================== Dashboard =================== */
.dashboard-header {
    margin-bottom: 2rem;
}

.dashboard-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.dashboard-header p {
    color: var(--text-secondary);
}

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

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 1.5rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.stat-content h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stat-change {
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

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

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

.dashboard-content {
    margin-top: 2rem;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 1.5rem;
}

.content-card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.view-all {
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 500;
}

.view-all:hover {
    text-decoration: underline;
}

.card-body {
    padding: 1.5rem;
}

/* =================== Tables =================== */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--bg-color);
}

.data-table th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
}

.data-table td {
    padding: 1rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background: var(--bg-color);
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

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

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

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

/* =================== Quick Stats =================== */
.quick-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.quick-stat-item {
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 8px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 2rem;
}

.login-box {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.login-header {
    text-align: center;
    padding: 2rem 2rem 1rem;
}

.login-header i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.login-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.login-form {
    padding: 2rem;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

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

.form-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-group i {
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-footer {
    margin-top: 1.5rem;
    text-align: center;
}

.back-to-login {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.back-to-login:hover {
    text-decoration: underline;
}

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

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.forgot-link {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 500;
}

.forgot-link:hover {
    text-decoration: underline;
}

.btn {
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-block {
    width: 100%;
}

/* =================== Responsive =================== */
@media (max-width: 768px) {
    .sidebar-toggle {
        display: block;
    }
    
    .admin-sidebar {
        position: fixed;
        left: -100%;
        z-index: 1000;
        transition: left 0.3s;
    }
    
    .admin-sidebar.active {
        left: 0;
    }
    
    .header-search {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 0.5rem;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}