/* ============================================
   NAVEGACIÓN — Nav, Logo, Theme toggle, Menu
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-color);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid var(--text-light);
}

.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    display: block;
    cursor: pointer;
}

.logo-ascii {
    font-size: 0.35rem;
    line-height: 1;
    margin: 0;
    color: var(--primary-color);
    transition: var(--transition);
}

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

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

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
}

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

.theme-toggle {
    position: relative;
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 1rem;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.theme-toggle .theme-checkbox {
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.theme-toggle .slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: transparent;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
}

.theme-toggle .slider:before {
    position: absolute;
    content: "";
    height: 8px;
    width: 8px;
    background-color: var(--primary-color);
    transition: var(--transition);
    border-radius: 50%;
    opacity: 0;
    transform: scale(0);
}

.theme-toggle .theme-checkbox:checked + .slider {
    border-color: #ffffff;
}

.theme-toggle .theme-checkbox:checked + .slider:before {
    opacity: 1;
    transform: scale(1);
    background-color: #ffffff;
}

.theme-toggle .slider:hover {
    opacity: 0.8;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: var(--transition);
}