/**
 * QR Menu System - Admin Panel CSS
 * Version: 2.0
 * Modern & Professional Design
 */

/* ============================================
   CSS VARIABLES (Admin Theme)
   ============================================ */
:root {
    --admin-primary: #667eea;
    --admin-primary-dark: #5568d3;
    --admin-secondary: #764ba2;
    --admin-success: #10b981;
    --admin-danger: #ef4444;
    --admin-warning: #f59e0b;
    --admin-info: #3b82f6;
    
    --admin-bg: #f8fafc;
    --admin-sidebar: #1e293b;
    --admin-sidebar-hover: #334155;
    --admin-card: #ffffff;
    
    --admin-text: #1e293b;
    --admin-text-light: #64748b;
    --admin-border: #e2e8f0;
    
    --admin-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --admin-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    --sidebar-width: 260px;
    --topbar-height: 70px;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

button {
    cursor: pointer;
    border: none;
    font-family: inherit;
    transition: all 0.3s ease;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ============================================
   LOGIN PAGE
   ============================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--admin-primary) 0%, var(--admin-secondary) 100%);
    padding: 20px;
}

.login-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    max-width: 450px;
    width: 100%;
}

.login-header {
    text-align: center;
    padding: 40px 40px 30px;
    background: linear-gradient(135deg, var(--admin-primary) 0%, var(--admin-secondary) 100%);
    color: white;
}

.login-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.login-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.login-subtitle {
    font-size: 0.95rem;
    opacity: 0.9;
}

.login-body {
    padding: 40px;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--admin-text);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--admin-border);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--admin-bg);
}

.form-control:focus {
    outline: none;
    border-color: var(--admin-primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.btn {
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

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

.alert {
    padding: 14px 16px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-danger {
    background: #fee;
    color: var(--admin-danger);
    border-left: 4px solid var(--admin-danger);
}

.alert-success {
    background: #efe;
    color: var(--admin-success);
    border-left: 4px solid var(--admin-success);
}

/* ============================================
   ADMIN LAYOUT
   ============================================ */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.admin-sidebar {
    width: var(--sidebar-width);
    background: var(--admin-sidebar);
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 1000;
    transition: all 0.3s ease;
}

.sidebar-header {
    padding: 25px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
}

.sidebar-logo-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.sidebar-menu {
    padding: 20px 0;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
    position: relative;
}

.menu-item:hover {
    background: var(--admin-sidebar-hover);
    color: white;
}

.menu-item.active {
    background: rgba(102, 126, 234, 0.2);
    color: white;
}

.menu-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--admin-primary);
}

.menu-icon {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

/* Main Content */
.admin-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    background: var(--admin-bg);
}

/* Topbar */
.admin-topbar {
    height: var(--topbar-height);
    background: white;
    border-bottom: 1px solid var(--admin-border);
    padding: 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 999;
    box-shadow: var(--admin-shadow);
}

.topbar-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--admin-text);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    border-radius: 12px;
    background: var(--admin-bg);
}

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

.user-name {
    font-weight: 600;
    color: var(--admin-text);
}

/* Page Content */
.page-content {
    padding: 30px;
}

.page-header {
    margin-bottom: 30px;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--admin-text);
    margin-bottom: 8px;
}

.page-description {
    color: var(--admin-text-light);
    font-size: 1rem;
}

/* Cards */
.card {
    background: var(--admin-card);
    border-radius: 16px;
    box-shadow: var(--admin-shadow);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--admin-border);
    display: flex;
    justify-content: between;
    align-items: center;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--admin-text);
}

.card-body {
    padding: 24px;
}

/* Table */
.table-container {
    overflow-x: auto;
}

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

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

.table th {
    padding: 16px;
    text-align: left;
    font-weight: 600;
    color: var(--admin-text);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    padding: 16px;
    border-top: 1px solid var(--admin-border);
    color: var(--admin-text);
}

.table tbody tr {
    transition: all 0.3s ease;
}

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

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
}

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

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

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }
    
    .admin-sidebar.active {
        transform: translateX(0);
    }
    
    .admin-content {
        margin-left: 0;
    }
    
    .topbar-title {
        font-size: 1.25rem;
    }
    
    .page-content {
        padding: 20px;
    }
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.d-none { display: none; }
.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-2 { gap: 16px; }
.mt-3 { margin-top: 24px; }
.mb-3 { margin-bottom: 24px; }