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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f1c40f;
    --text-color: #333;
    --light-gray: #f5f6fa;
    --border-color: #dcdde1;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    background: var(--light-gray);
    color: var(--text-color);
}

/* Admin layout */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
    background: var(--light-gray);
}

.admin-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 250px;
    height: 100vh;
    background: var(--primary-color);
    color: #fff;
    z-index: 1000;
}

.admin-header {
    position: fixed;
    top: 0;
    right: 0;
    left: 250px;
    height: 60px;
    background: #fff;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 900;
}

.content-wrapper {
    flex: 1;
    margin-left: 250px;
    margin-top: 60px;
    padding: 2rem;
    background: var(--light-gray);
}

/* Sidebar styles */
.sidebar-nav {
    padding: 1rem 0;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 0.5rem;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 0.8rem 1.5rem;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-nav a:hover,
.sidebar-nav .active a {
    background: rgba(255,255,255,0.1);
    padding-left: 2rem;
}

.sidebar-nav i {
    width: 20px;
    margin-right: 10px;
    text-align: center;
}

/* Content header */
.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.content-header h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin: 0;
}

/* Card styles */
.card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.card-body {
    padding: 1.5rem;
}

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

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

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

.table th {
    font-weight: 600;
    background: var(--light-gray);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary-color);
}

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

/* Button styles */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.3s;
}

.btn i {
    margin-right: 0.5rem;
}

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

.btn-primary:hover {
    background: #34495e;
}

.btn-secondary {
    background: #95a5a6;
    color: #fff;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.btn-danger {
    background: var(--danger-color);
    color: #fff;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
}

/* Badge styles */
.badge {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.badge-success {
    background: var(--success-color);
    color: #fff;
}

.badge-warning {
    background: var(--warning-color);
    color: #333;
}

/* Form actions */
.form-actions {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
}

/* Logo styles */
.logo h1 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin: 0;
}

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

.user-menu span {
    color: var(--text-color);
}

.btn-logout {
    background: var(--danger-color);
    color: #fff;
    padding: 0.5rem 1rem;
}

.btn-logout:hover {
    background: #c0392b;
}