/* ===========================
   NAVIGATION
   =========================== */

nav {
    background: #2c3e50;
    color: #fff;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

nav.scrolled {
    background: #1a252f;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav .logo {
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(90deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #3498db;
    transition: width 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #3498db;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: transform 0.3s ease;
}

.menu-toggle:hover {
    transform: scale(1.1);
}

.menu-toggle:focus {
    outline: 2px solid #3498db;
    outline-offset: 4px;
}