:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --danger-dark: #b91c1c;
    --background: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --border: #e2e8f0;
    --text-muted: #64748b;
    --sidebar-width: 250px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.5;
    padding: 1rem;
}

/* Header Styles */
.header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 2rem;
    animation: slideDown 0.5s ease-out;
}

.header h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.25rem;
    color: var(--text);
    margin: 0;
}

/* Menu Trigger Button */
.menu-trigger {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem;
    border-radius: 0.5rem;
    cursor: pointer;
    z-index: 1001;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.menu-trigger:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 8px -2px rgba(0, 0, 0, 0.1);
}

.menu-trigger.hidden {
    display: none;
}

/* Sidebar Styles */
.sidebar {
    position: fixed;
    left: -500px; /* Start off-screen */
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--card);
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, opacity 0.3s ease; /* Changed transition property */
    z-index: 1000;
    opacity: 0;
    visibility: hidden; /* Hide initially */
    transform: translateX(-100%); /* Use transform instead of left */
}

.sidebar.active {
    transform: translateX(0); /* Slide in using transform */
    opacity: 1;
    visibility: visible;
    left: 0;
}

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

.sidebar-header h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.sidebar-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.2s;
}

.sidebar-close:hover {
    color: var(--primary);
}

/* Navigation Links */
.nav-links {
    list-style: none;
    padding: 1rem 0;
    margin: 0;
}

.nav-links li a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--text);
    text-decoration: none;
    transition: all 0.2s ease;
    gap: 0.75rem;
    font-weight: 500;
}

.nav-links li a:hover,
.nav-links li a.active {
    background-color: var(--background);
    color: var(--primary);
    transform: translateX(4px);
}

.nav-links li a i {
    width: 1.25rem;
    text-align: center;
    color: var(--text-muted);
    transition: color 0.2s;
}

.nav-links li a:hover i,
.nav-links li a.active i {
    color: var(--primary);
}

/* Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Content Area */
.content {
    margin-left: 0;
    padding: 2rem;
    transition: margin-left 0.3s ease;
}

/* Animations */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .content {
        margin-left: 0;
        padding: 1rem;
    }
    
    .sidebar {
        width: 100%;
        max-width: 300px;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .header h1 {
        font-size: 1.75rem;
    }
}