:root {
    --primary-color: #0070BA;
    --primary-dark: #005a96;
    --dark-color: #333;
    --light-color: #f4f6f9;
    --sidebar-width: 250px;
    --header-height: 60px;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--light-color);
    color: var(--dark-color);
}

/* Admin Container */
.admin-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.admin-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--dark-color);
    color: white;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 1.5rem;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header .logo {
    width: 80px;
    height: auto;
    margin-bottom: 1rem;
}

.sidebar-header h2 {
    margin: 0;
    font-size: 1.2rem;
    color: white;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.sidebar-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav li a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.3s ease;
}

.sidebar-nav li a:hover,
.sidebar-nav li a.active {
    background-color: rgba(255,255,255,0.1);
    color: white;
}

.sidebar-nav li a i {
    margin-right: 0.75rem;
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.logout-btn {
    display: flex;
    align-items: center;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.logout-btn:hover {
    color: white;
}

.logout-btn i {
    margin-right: 0.75rem;
}

/* Main Content */
.admin-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background-color: var(--light-color);
    padding: 2rem;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1001;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 0.5rem;
    cursor: pointer;
    font-size: 1.25rem;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .admin-sidebar {
        transform: translateX(-100%);
    }

    .admin-sidebar.active {
        transform: translateX(0);
    }

    .admin-main {
        margin-left: 0;
        padding: 1rem;
        padding-top: 4rem;
    }
}

/* Common Components */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

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

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

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

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.alert {
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
    border: 1px solid transparent;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}