/* Header Profesional Rediseñado - CORREGIDO */
header {
    background-color: var(--primary);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    animation: slideDown 0.6s ease-out;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Añadir padding al body para compensar el header fijo */
body {
    padding-top: 80px;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    z-index: 1001;
}

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

.logo img {
    height: 45px;
    transition: all 0.3s ease;
    filter: brightness(0) invert(1);
}

/* CORRECCIÓN MODO CLARO/OSCURO */
body.light-mode header {
    background-color: var(--primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

body.light-mode .logo img {
    filter: brightness(0) invert(1); /* Logo blanco en ambos modos para el header */
}

nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 35px;
    margin: 0;
    padding: 0;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 8px 0;
    font-family: 'Montserrat', sans-serif;
    letter-spacing: 0.5px;
}

nav a:hover {
    color: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
}

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: linear-gradient(90deg, white, rgba(255, 255, 255, 0.7));
    border-radius: 2px;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

nav a:hover::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
    z-index: 1001;
}

/* Toggle de modo claro/oscuro - CORREGIDO */
.theme-toggle {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    padding: 10px;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    transform: rotate(180deg) scale(1.1);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

/* Iconos del toggle - CORREGIDO */
.theme-toggle .fa-sun,
.theme-toggle .fa-moon {
    position: absolute;
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.theme-toggle .fa-moon {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

.theme-toggle .fa-sun {
    opacity: 0;
    transform: scale(0) rotate(-180deg);
}

body.light-mode .theme-toggle .fa-moon {
    opacity: 0;
    transform: scale(0) rotate(180deg);
}

body.light-mode .theme-toggle .fa-sun {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

/* Botón Menú Móvil - CORREGIDO */
.mobile-menu-btn {
    display: none;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 1.3rem;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    padding: 10px;
    border-radius: 12px;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1001;
}

.mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.15);
}

.mobile-menu-btn.active {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.6);
}

/* Efecto de scroll en el header - MEJORADO */
.header-scrolled {
    background-color: rgba(229, 57, 53, 0.98);
    backdrop-filter: blur(30px);
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.2);
    padding: 0;
}

body.light-mode .header-scrolled {
    background-color: rgba(229, 57, 53, 0.98);
}

/* Animaciones mejoradas */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Menú Móvil - PROFESIONAL Y CORREGIDO */
@media (max-width: 768px) {
    body {
        padding-top: 70px; /* Ajustar para móvil */
    }
    
    .header-container {
        padding: 10px 15px;
    }
    
    .logo img {
        height: 38px;
    }
    
    nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        flex-direction: column;
        padding: 100px 20px 30px;
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.3);
        z-index: 999;
        transition: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
        justify-content: flex-start;
        backdrop-filter: blur(20px);
    }
    
    body.light-mode nav {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    }
    
    nav.active {
        right: 0;
    }
    
    nav ul {
        flex-direction: column;
        width: 100%;
        gap: 0;
        align-items: center;
    }
    
    nav ul li {
        width: 100%;
        max-width: 280px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        opacity: 0;
        transform: translateX(50px);
        transition: all 0.4s ease;
    }
    
    nav.active ul li {
        opacity: 1;
        transform: translateX(0);
    }
    
    nav.active ul li:nth-child(1) { transition-delay: 0.1s; }
    nav.active ul li:nth-child(2) { transition-delay: 0.2s; }
    nav.active ul li:nth-child(3) { transition-delay: 0.3s; }
    nav.active ul li:nth-child(4) { transition-delay: 0.4s; }
    
    nav ul li:last-child {
        border-bottom: none;
    }
    
    nav a {
        display: block;
        padding: 18px 0;
        width: 100%;
        text-align: center;
        font-size: 1.1rem;
        font-weight: 600;
        letter-spacing: 1px;
    }
    
    nav a::after {
        display: none;
    }
    
    nav a:hover {
        transform: translateX(10px);
        background: rgba(255, 255, 255, 0.1);
        border-radius: 12px;
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .header-actions {
        gap: 10px;
    }
    
    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .header-scrolled {
        padding: 0;
    }
}

@media (max-width: 480px) {
    body {
        padding-top: 65px; /* Ajuste más fino para móviles pequeños */
    }
    
    .header-container {
        padding: 8px 12px;
    }
    
    .logo img {
        height: 32px;
    }
    
    nav {
        padding: 90px 15px 30px;
    }
    
    nav a {
        font-size: 1rem;
        padding: 16px 0;
    }
    
    .mobile-menu-btn,
    .theme-toggle {
        width: 38px;
        height: 38px;
        font-size: 0.9rem;
    }
}

/* Efecto de partículas en el fondo del header móvil */
nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    z-index: -1;
}