:root {
    --nav-width: 280px;
    --transition-speed: 0.3s;

    --primary-color: #4b0082;
    --secondary-color: #6a0dad;
    --accent-color: #9370db;
    --highlight-color: #da70d6;
    --hover-color: #8a2be2;
    --text-color: #e6e6fa;
    --overlay-color: rgba(0, 0, 0, 0.5);
}

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

/* Hamburger menu button (mobile only) */
.menu-toggle {
    display: none;
    position: fixed;
    top: 15px;
    left: 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: var(--text-color);
    font-size: 24px;
    z-index: 3001;
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.menu-toggle:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    transform: scale(1.05);
}

/* Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    background: var(--overlay-color);
    width: 100%;
    height: 100%;
    z-index: 3000;
    display: none;
    opacity: 0;
    transition: opacity var(--transition-speed);
}
.overlay.show { display: block; opacity: 1; }

/* Sidebar / Mobile Nav */
nav {
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    height: 100vh;
    width: var(--nav-width);
    position: fixed;
    top: 0;
    left: -100%;
    transition: left var(--transition-speed) ease-in-out;
    z-index: 1100;
    padding-top: 20px;
    display: flex;
    flex-direction: column;
    border-right: 3px solid var(--accent-color);
    overflow-y: visible;
}
nav.show { left: 0; }

/* Nav header */
.nav-header {
    padding: 15px;
    color: var(--text-color);
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    border-bottom: 2px solid var(--accent-color);
}
.nav-header i { margin-right: 8px; color: var(--highlight-color); }

/* Nav links */
nav ul { list-style: none; padding: 10px 0; }
nav ul li a {
    display: flex;
    align-items: center;
    color: var(--text-color);
    text-decoration: none;
    padding: 12px 20px;
    margin: 6px 10px;
    border-radius: 8px;
    transition: all var(--transition-speed);
    font-size: 1rem;
}
nav ul li a i { margin-right: 10px; color: var(--accent-color); width: 20px; text-align: center; }
nav ul li a:hover { background: rgba(138, 43, 226, 0.3); transform: translateX(6px); }
nav ul li a.active { background: rgba(138, 43, 226, 0.5); border-left: 4px solid var(--highlight-color); }
nav ul li a.active i { color: var(--highlight-color); }

/* Cart badge */
.cart-icon { position: relative; }
.cart-count {
    position: absolute;
    top: -6px;
    right: -8px;
    background: var(--highlight-color);
    color: white;
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 50%;
    font-weight: bold;
}

/* Dropdowns */
li.dropdown { position: relative; }
li.dropdown > a { cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
li.dropdown .dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--secondary-color);
    min-width: 180px;
    border-radius: 5px;
    padding: 0.5rem 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    z-index: 3100;
}
li.dropdown .dropdown-content li { margin: 0; }
li.dropdown .dropdown-content a { padding: 0.5rem 1rem; display: block; color: #fff; }
li.dropdown .dropdown-content a:hover { background: #8b3fdc; }

/* Desktop hover for dropdown */
@media(min-width: 1025px) {
    li.dropdown:hover .dropdown-content { display: block; }

    nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: auto;
        flex-direction: row;
        align-items: center;
        padding: 0 20px;
        border-bottom: 3px solid var(--accent-color);
        background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
        overflow: visible;
    }
    .nav-header { font-size: 1.4rem; padding: 15px 20px; }
    nav ul { display: flex; justify-content: flex-end; align-items: center; padding: 0; margin: 0; }
    nav ul li { margin: 0 10px; }
    nav ul li a { padding: 10px 15px; border-radius: 6px; }
    nav ul li a:hover { background: rgba(138,43,226,0.3); transform: none; }
    nav ul li a.active { border-bottom: 3px solid var(--highlight-color); }
    .menu-toggle, .overlay { display: none !important; }
}
/* Tablet & Mobile: vertical nav with toggle */
@media(max-width: 1024px) {
    :root { --nav-width: 280px; }

    nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: var(--nav-width);
        height: 100vh;
        flex-direction: column;
        padding-top: 20px;
        border-right: 3px solid var(--accent-color);
        background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
        overflow-y: auto;
        z-index: 1001; /* nav above page content */
    }

    .nav-header { font-size: 1.35rem; padding: 15px; }
    nav ul { display: flex; flex-direction: column; padding: 0; margin: 0; }
    nav ul li { margin: 6px 0; }
    nav ul li a { padding: 10px 18px; font-size: 0.95rem; border-radius: 6px; }

    li.dropdown .dropdown-content {
        display: block;
        position: static;
        background: transparent;
        box-shadow: none;
        padding: 0;
    }
    li.dropdown > a { display: none; }

    .menu-toggle { display: block; z-index: 1002; } /* toggle above nav */
    .overlay {
        display: none; /* shown by JS when toggle is active */
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 1000; /* below nav so links are clickable */
    }
}

/* Extra small mobile */
@media(max-width: 480px) {
    :root { --nav-width: 200px; }
    nav { width: var(--nav-width); }
    nav ul li a { font-size: 0.85rem; padding: 10px 15px; }
    .nav-header { font-size: 1.2rem; }
}