/* Header & Navigation */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: transparent;
    z-index: 100;
    transition: all var(--transition-normal);
}

.header.scroll-header {
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
    border-bottom: 1px solid rgba(59, 130, 246, 0.1);
}

.nav {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.nav__logo {
    display: flex;
    align-items: center;
    font-size: var(--text-xl);
    font-weight: 700;
    gap: 6px;
    transition: all var(--transition-fast);
    position: relative;
}

.nav__logo::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width var(--transition-normal);
}

.nav__logo:hover::before {
    width: 100%;
}

.nav__logo:hover {
    transform: translateY(-2px);
}

.nav__logo-bracket {
    color: var(--primary-color);
    font-family: var(--font-code);
    font-size: var(--text-2xl);
    font-weight: 400;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.nav__logo-text {
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--text-primary), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Menu */
.nav__menu {
    display: flex;
    align-items: center;
}

.nav__list {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav__item {
    position: relative;
}

.nav__link {
    position: relative;
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    padding: 10px 16px;
    display: block;
    border-radius: 8px;
}

.nav__link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 8px;
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: -1;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 6px;
    left: 16px;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width var(--transition-normal);
}

.nav__link:hover::before,
.nav__link.active::before {
    opacity: 1;
}

.nav__link:hover,
.nav__link.active {
    color: var(--primary-color);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: calc(100% - 32px);
}

/* Toggle Button (Mobile) */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 101;
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    transition: background var(--transition-fast);
}

.nav__toggle:hover {
    background: rgba(59, 130, 246, 0.1);
}

.nav__toggle-bar {
    width: 26px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all var(--transition-normal);
    position: relative;
}

.nav__toggle.active .nav__toggle-bar {
    background: var(--primary-color);
}

.nav__toggle.active .nav__toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav__toggle.active .nav__toggle-bar:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.nav__toggle.active .nav__toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        height: 70px;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 350px;
        height: 100vh;
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.98) 0%, rgba(30, 41, 59, 0.98) 100%);
        backdrop-filter: blur(20px);
        padding: 100px 30px 30px;
        transition: right var(--transition-normal);
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
        border-left: 1px solid rgba(59, 130, 246, 0.2);
    }
    
    .nav__menu.show-menu {
        right: 0;
    }
    
    .nav__list {
        flex-direction: column;
        gap: 0;
    }
    
    .nav__item {
        width: 100%;
        border-bottom: 1px solid rgba(59, 130, 246, 0.1);
    }
    
    .nav__item:last-child {
        border-bottom: none;
    }
    
    .nav__link {
        font-size: var(--text-lg);
        padding: 18px 20px;
        width: 100%;
        border-radius: 0;
    }
    
    .nav__link::after {
        left: 20px;
        bottom: 16px;
    }
    
    .nav__link.active::after,
    .nav__link:hover::after {
        width: calc(100% - 40px);
    }
    
    .nav__logo {
        font-size: var(--text-lg);
    }
    
    .nav__logo-bracket {
        font-size: var(--text-xl);
    }
    
    /* Overlay cuando el menú está abierto */
    .nav__menu.show-menu::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.5);
        z-index: -1;
        animation: fadeIn 0.3s ease;
    }
    
    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }
}