/* ===================================
   THEME TOGGLE - PUNTO 19
   Switch para cambiar entre tema claro/oscuro
   =================================== */

.theme-toggle {
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    margin-left: var(--spacing-md);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.theme-toggle-track {
    width: 50px;
    height: 24px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    position: relative;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.theme-toggle.dark .theme-toggle-track {
    background: var(--primary-blue);
    border-color: var(--primary-purple);
}

.theme-toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background: var(--white);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.theme-toggle.dark .theme-toggle-thumb {
    transform: translateX(26px);
    background: var(--gray-800);
}

.theme-icon {
    position: absolute;
    font-size: 10px;
    transition: all var(--transition-normal);
}

.sun-icon {
    color: var(--primary-cyan);
    opacity: 1;
    transform: rotate(0deg);
}

.moon-icon {
    color: var(--primary-purple);
    opacity: 0;
    transform: rotate(180deg);
}

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

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

/* === EFECTOS HOVER === */
.theme-toggle:hover .theme-toggle-thumb {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.theme-toggle.dark:hover .theme-toggle-thumb {
    transform: translateX(26px) scale(1.1);
}

/* === ANIMACIONES === */
@keyframes theme-switch {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(0.8);
    }
    100% {
        transform: scale(1);
    }
}

.theme-toggle-thumb.switching {
    animation: theme-switch 0.3s ease-in-out;
}

/* === ESTADOS FOCUS === */
.theme-toggle:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
}

.theme-toggle:focus .theme-toggle-track {
    border-color: var(--primary-purple);
}

/* === TEMA OSCURO === */
[data-theme="dark"] .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .theme-toggle-track {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .theme-toggle {
        position: fixed;
        top: var(--spacing-lg);
        right: 60px;
        z-index: var(--z-fixed);
        background: rgba(0, 0, 0, 0.1);
        backdrop-filter: blur(10px);
        border-radius: var(--radius-full);
        padding: var(--spacing-sm);
    }
    
    .theme-toggle-track {
        width: 40px;
        height: 20px;
    }
    
    .theme-toggle-thumb {
        width: 16px;
        height: 16px;
    }
    
    .theme-toggle.dark .theme-toggle-thumb {
        transform: translateX(20px);
    }
    
    .theme-toggle.dark:hover .theme-toggle-thumb {
        transform: translateX(20px) scale(1.1);
    }
    
    .theme-icon {
        font-size: 8px;
    }
}

/* === ACCESIBILIDAD === */
@media (prefers-reduced-motion: reduce) {
    .theme-toggle-thumb,
    .theme-icon,
    .theme-toggle-track {
        transition: none;
    }
    
    .theme-toggle-thumb.switching {
        animation: none;
    }
}

/* === INDICADOR DE TEMA ACTIVO === */
.theme-indicator {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--gray-600);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    pointer-events: none;
    z-index: var(--z-toast);
}

.theme-indicator.show {
    opacity: 1;
    transform: translateY(0);
}

.theme-indicator::before {
    content: '';
    position: absolute;
    top: -5px;
    right: 20px;
    width: 10px;
    height: 10px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-bottom: none;
    border-right: none;
    transform: rotate(45deg);
}

/* === TEMA TOGGLE EN NAVBAR === */
.navbar .theme-toggle {
    margin-left: auto;
}

@media (max-width: 768px) {
    .navbar .theme-toggle {
        display: none;
    }
}

/* === ANIMACIÓN DE CAMBIO DE TEMA === */
.theme-transition {
    transition: background-color var(--transition-slow), 
                color var(--transition-slow),
                border-color var(--transition-slow);
}

/* Aplicar transición suave a elementos principales */
body,
.header,
.hero,
section,
.card,
.btn {
    transition: background-color var(--transition-slow), 
                color var(--transition-slow),
                border-color var(--transition-slow);
}

/* === EFECTOS ESPECIALES === */
.theme-toggle-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.theme-toggle:hover .theme-toggle-glow {
    opacity: 1;
}

.theme-toggle.dark:hover .theme-toggle-glow {
    background: radial-gradient(circle, rgba(6, 182, 212, 0.3) 0%, transparent 70%);
}