/**
 * DarkSpace Office Platform - Admin Panel Styles
 * 
 * Responsive, modern admin interface
 * 
 * @version 1.0.0
 */

/* ============================================================================
   CSS Variables (Theme)
   ========================================================================= */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    
    --bg-color: #f8fafc;
    --bg-dark: #1e293b;
    --text-color: #1e293b;
    --text-light: #64748b;
    --text-white: #ffffff;
    
    --border-color: #e2e8f0;
    --border-radius: 8px;
    --box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --box-shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.1);
    
    --sidebar-width: 260px;
    --header-height: 64px;
    
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* ============================================================================
   Reset & Base Styles
   ========================================================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-dark);
}

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-dark);
    color: var(--text-white);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    transition: transform 0.3s;
    z-index: 1000;
}

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

.sidebar-logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-white);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
}

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

.sidebar-nav-item {
    display: block;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sidebar-nav-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-white);
}

.sidebar-nav-item.active {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--text-white);
    border-left-color: var(--primary-color);
}

.sidebar-nav-item i {
    width: 20px;
    margin-right: 10px;
}

.sidebar-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.sidebar-user-info {
    flex: 1;
}

.sidebar-user-name {
    font-weight: 600;
    font-size: 14px;
}

.sidebar-user-role {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    height: var(--header-height);
    background-color: var(--text-white);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-color);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-light);
}

.breadcrumb-item {
    color: var(--text-light);
}

.breadcrumb-item.active {
    color: var(--text-color);
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.btn-logout {
    padding: 8px 16px;
    background-color: var(--danger-color);
    color: var(--text-white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s;
}

.btn-logout:hover {
    background-color: #dc2626;
}

/* Content Area */
.content {
    flex: 1;
    padding: 30px;
}

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

.page-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 8px;
}

.page-subtitle {
    color: var(--text-light);
    font-size: 14px;
}

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

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

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-color);
}

/* ============================================================================
   Stats Cards
   ========================================================================= */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--text-white);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-lg);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-icon.primary {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

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

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

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

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-light);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-color);
}

.stat-change {
    font-size: 12px;
    margin-top: 4px;
}

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

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

/* ============================================================================
   Tables
   ========================================================================= */
.table-responsive {
    overflow-x: auto;
}

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

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

th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-light);
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

tr:hover {
    background-color: var(--bg-color);
}

/* ============================================================================
   Buttons
   ========================================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

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

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

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

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

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

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* ============================================================================
   Forms
   ========================================================================= */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
select,
textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: border-color 0.2s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* ============================================================================
   Badges
   ========================================================================= */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-primary {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

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

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

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

/* ============================================================================
   Alerts
   ========================================================================= */
.alert {
    padding: 16px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--info-color);
    border-left: 4px solid var(--info-color);
}

/* ============================================================================
   Responsive Design
   ========================================================================= */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .content {
        padding: 20px;
    }
}

/* ============================================================================
   Utilities
   ========================================================================= */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-2 {
    gap: 16px;
}