/* ============================================
   3. LAYOUT - Navigation & Common Structures
   ============================================ */

/* Navigation Bar */
nav {
    position: fixed;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    border-radius: 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

body.dark-mode nav {
    background: rgba(212, 255, 0, 0.95);
    border: none;
}

nav:hover {
    box-shadow: 0 8px 40px rgba(212, 255, 0, 0.2);
}

/* Logo */
.logo {
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
}

.logo:hover {
    transform: scale(1.05);
}

body.dark-mode .logo-light {
    display: none !important;
}

body.dark-mode .logo-dark {
    display: block !important;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    transition: all 0.3s;
    border-radius: 2px;
}

body.dark-mode .menu-toggle span {
    background: #000;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Navigation Links */
.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    transition: color 0.3s;
    letter-spacing: 0.02em;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #d4ff00;
    transition: width 0.3s ease;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: #d4ff00;
}

body.dark-mode .nav-links a {
    color: #000;
}

body.dark-mode .nav-links a:hover,
body.dark-mode .nav-links a.active {
    color: #000;
}

body.dark-mode .nav-links a::after {
    background: #000;
}