:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --accent: #f72585;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Header */
header {
    background: linear-gradient(135deg, #4361ee, #3a0ca3);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: white;
    text-decoration: none;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    color: white;
    gap: 25px;
}

.nav-links a {
    color: var(--light);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: white;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: white;
}


/* Mobile Menu Overlay Styles */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100%;
    background: white;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: right 0.3s ease;
    overflow-y: auto;
}

.mobile-menu-overlay.active {
    right: 0;
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid #eee;
}

.mobile-menu-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--primary);
}

.mobile-menu-links {
    padding: 20px;
}

.mobile-menu-links a {
    display: block;
    padding: 15px 0;
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid #f5f5f5;
}

.mobile-menu-links a:hover {
    color: var(--primary);
}

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

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

/* Show mobile menu button only on mobile */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    .nav-links {
        display: none;
    }
}