:root {
    --bg: #ffffff;
    --text: #111;
    --muted: #666;
    --accent: #2563eb;
    --border: #e5e7eb;
}

nav {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    font-family: "Inter", "Segoe UI", Arial, sans-serif;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.menu {
    max-width: 1200px;
    margin: auto;
    padding: 14px 32px;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 32px;
}

.menu li {
    position: relative;
}

.menu a {
    text-decoration: none;
    color: var(--text);
    font-size: 15px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 4px;
    transition: color .2s ease;
}

.menu a i {
    font-size: 14px;
    color: var(--muted);
}

.menu a:hover {
    color: var(--accent);
}

.menu a:hover i {
    color: var(--accent);
}

.menu li ul {
    position: absolute;
    top: 130%;
    left: 0;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    min-width: 190px;
    padding: 8px;
    list-style: none;
    box-shadow: 0 12px 30px rgba(0,0,0,.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: all .2s ease;
}

.menu li ul a {
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 14px;
}

.menu li ul a:hover {
    background: #f3f4f6;
}

.menu li:hover > ul {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    padding: 18px;
}

.navbar-toggle div {
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: .3s;
}

@media (max-width: 900px) {

    nav {
        padding: 0;
    }

    .navbar-toggle {
        display: flex;
    }

    .menu {
        display: none;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        gap: 12px;
    }

    .menu.active {
        display: flex;
    }

    .menu li {
        width: 100%;
    }

    .menu li ul {
        position: static;
        box-shadow: none;
        border: none;
        padding-left: 15px;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
    }

    .menu li.open ul {
        display: block;
    }
}