/* ===================================
   NAVEGACIÓN PRINCIPAL RESPONSIVA
   =================================== */

.main-header {
    background: var(--Brand-White);
    box-shadow: 0 2px 10px var(--Shadow-Light);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 3px solid var(--Brand-Green);
}

.main-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* ===================================
   MARCA Y LOGO
   =================================== */

.nav-brand {
    flex-shrink: 0;
}

.brand-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--Brand-Green);
    font-weight: 700;
    font-size: 1.5rem;
    transition: opacity 0.3s ease;
}

.brand-link:hover {
    opacity: 0.8;
}

.brand-logo {
    height: 45px;
    width: auto;
    margin-right: 0.75rem;
}

.brand-text {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    letter-spacing: -0.5px;
}

/* ===================================
   BOTÓN HAMBURGUESA (MÓVIL)
   =================================== */

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    position: relative;
    z-index: 1001;
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background: var(--Brand-Green);
    margin: 3px 0;
    transition: 0.3s ease;
    border-radius: 2px;
}

/* Animación del hamburguesa cuando está activo */
.nav-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.nav-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* ===================================
   MENÚ DE NAVEGACIÓN
   =================================== */

.nav-menu {
    display: flex;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 0.75rem 1.25rem;
    text-decoration: none;
    color: var(--Brand-Gray-Dark);
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--Brand-Green);
    background: var(--Brand-Green-Accent);
}

/* CTA Button (Login) */
.nav-item-cta .nav-link-cta {
    background: var(--Brand-Green);
    color: white;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.nav-item-cta .nav-link-cta:hover {
    background: var(--Brand-Green-Dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--Brand-Green-Shadow);
}

/* ===================================
   ESPACIADO PARA HEADER FIJO
   =================================== */

body {
    padding-top: 70px;
}

/* ===================================
   RESPONSIVO - TABLET
   =================================== */

@media (max-width: 968px) {
    .main-nav {
        padding: 0 1.5rem;
    }
    
    .nav-list {
        gap: 0.25rem;
    }
    
    .nav-link {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    .brand-text {
        font-size: 1.3rem;
    }
    
    .brand-logo {
        height: 40px;
    }
}

/* ===================================
   RESPONSIVO - MÓVIL
   =================================== */

@media (max-width: 768px) {
    .main-nav {
        padding: 0 1rem;
        height: 60px;
    }
    
    body {
        padding-top: 60px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 4px 20px var(--Shadow-Medium);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        border-top: 3px solid var(--Brand-Green);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
    }
    
    .nav-item {
        width: 100%;
        text-align: center;
    }
    
    .nav-link {
        padding: 1rem 2rem;
        border-radius: 0;
        font-size: 1rem;
        border-bottom: 1px solid var(--Border-Light);
    }
    
    .nav-link:hover {
        background: var(--Brand-Green-Accent);
    }
    
    .nav-item-cta .nav-link-cta {
        margin: 1rem 2rem;
        padding: 1rem 2rem;
        border-radius: 25px;
        background: var(--Brand-Green);
        color: white;
        border-bottom: none;
    }
    
    .nav-item-cta .nav-link-cta:hover {
        background: var(--Brand-Green-Dark);
        transform: none;
    }
    
    .brand-text {
        font-size: 1.2rem;
    }
    
    .brand-logo {
        height: 35px;
        margin-right: 0.5rem;
    }
}

/* ===================================
   MÓVIL PEQUEÑO
   =================================== */

@media (max-width: 480px) {
    .main-nav {
        padding: 0 0.75rem;
    }
    
    .brand-text {
        font-size: 1.1rem;
    }
    
    .brand-logo {
        height: 32px;
    }
    
    .nav-link {
        padding: 0.875rem 1.5rem;
    }
    
    .nav-item-cta .nav-link-cta {
        margin: 0.75rem 1.5rem;
        padding: 0.875rem 1.5rem;
    }
}

/* ===================================
   ACCESIBILIDAD Y ENFOQUE
   =================================== */

.nav-link:focus,
.nav-toggle:focus,
.brand-link:focus {
    outline: 2px solid var(--Brand-Green);
    outline-offset: 2px;
}

/* Mejora de contraste para modo alto contraste */
@media (prefers-contrast: high) {
    .nav-link {
        border: 1px solid transparent;
    }
    
    .nav-link:hover,
    .nav-link:focus {
        border-color: var(--Brand-Green);
        background: white;
    }
}

/* Respeto a preferencias de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
    .nav-link,
    .brand-link,
    .nav-menu,
    .hamburger-line {
        transition: none;
    }
}