/* ===== ANIMACIONES Y TRANSICIONES ===== */

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

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* Animaciones específicas para notas */
@keyframes noteHit {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 rgba(76, 175, 80, 0.5);
    }
    50% {
        transform: scale(1.15);
        box-shadow: 0 0 20px rgba(76, 175, 80, 0.8);
    }
    100% {
        transform: scale(1.1);
        box-shadow: 0 0 15px rgba(76, 175, 80, 0.6);
    }
}

@keyframes noteClose {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

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

/* Animaciones para el estado de la aplicación */
@keyframes statusPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.1);
    }
}

@keyframes recordingBlink {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.3;
    }
}

/* Animaciones para el medidor de precisión */
@keyframes precisionSlide {
    from {
        left: 50%;
    }
    to {
        left: var(--target-position, 50%);
    }
}

@keyframes precisionGlow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
    }
    50% {
        box-shadow: 0 0 15px rgba(255, 255, 255, 0.8);
    }
}

/* Efectos de hover mejorados */
@keyframes buttonHover {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(-2px);
    }
}

@keyframes buttonPress {
    from {
        transform: translateY(-2px) scale(1);
    }
    to {
        transform: translateY(0) scale(0.98);
    }
}

/* Animaciones de carga */
@keyframes loading {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes loadingDots {
    0%, 20% {
        opacity: 0.2;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
    100% {
        opacity: 0.2;
        transform: scale(1);
    }
}

/* Animaciones para errores */
@keyframes errorShake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

@keyframes errorGlow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(244, 67, 54, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(244, 67, 54, 0.6);
    }
}

/* Clases de animación */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

.fade-out {
    animation: fadeOut 0.5s ease-in;
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

.slide-out {
    animation: slideOut 0.3s ease-in;
}

/* Animaciones de notas */
.note-item.hit {
    animation: noteHit 0.3s ease-out;
}

.note-item.close {
    animation: noteClose 1s ease-in-out infinite;
}

.note-item.far {
    animation: noteFar 0.8s ease-in-out infinite;
}

/* Estados de la aplicación */
.status-light.recording {
    animation: recordingBlink 1s ease-in-out infinite;
}

.status-indicator.active {
    animation: statusPulse 2s ease-in-out infinite;
}

/* Precisión animada */
.precision-indicator {
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.precision-indicator.glowing {
    animation: precisionGlow 1.5s ease-in-out infinite;
}

/* Botones animados */
.btn {
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:active {
    animation: buttonPress 0.1s ease-out;
}

/* Carga y loading */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top: 2px solid var(--primary-color);
    animation: loading 1s linear infinite;
}

.loading-dots {
    display: inline-flex;
    gap: 4px;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: loadingDots 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

/* Errores animados */
.error-display {
    animation: fadeIn 0.3s ease-out;
}

.error-content {
    animation: errorShake 0.6s ease-out;
}

.error-content.glowing {
    animation: errorGlow 1s ease-in-out infinite;
}

/* Transiciones suaves para cambios de estado */
.transition-smooth {
    transition: all var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-fast {
    transition: all var(--transition-fast) ease-out;
}

.transition-slow {
    transition: all var(--transition-slow) ease-in-out;
}

/* Efectos de paralaje ligero */
@keyframes parallaxFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

.float-effect {
    animation: parallaxFloat 4s ease-in-out infinite;
}

/* Efectos de brillo para elementos activos */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.shimmer {
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    background-size: 1000px 100%;
    animation: shimmer 2s ease-in-out infinite;
}

/* ========================================
   ANIMACIONES FASE 4: VISUALIZACIONES AVANZADAS
   ======================================== */

/* Animaciones del medidor visual circular */
@keyframes meterGlow {
    0%, 100% {
        box-shadow: 0 0 10px rgba(33, 150, 243, 0.3);
        filter: brightness(1);
    }
    50% {
        box-shadow: 0 0 25px rgba(33, 150, 243, 0.6);
        filter: brightness(1.1);
    }
}

@keyframes needleSwing {
    0% { transform: rotate(-45deg); }
    50% { transform: rotate(0deg); }
    100% { transform: rotate(45deg); }
}

@keyframes frequencyPulse {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
    }
    50% {
        transform: scale(1.05);
        filter: drop-shadow(0 4px 12px rgba(76, 175, 80, 0.6));
    }
}

/* Animaciones del panel de notas interactivo */
@keyframes noteActivate {
    0% {
        transform: scale(1);
        background: #2a2a2a;
        border-color: #666;
    }
    50% {
        transform: scale(1.1);
        background: #1a1a1a;
    }
    100% {
        transform: scale(1);
        background: #1a1a1a;
        border-color: currentColor;
    }
}

@keyframes noteGlow {
    0% {
        opacity: 0;
        transform: scale(1);
    }
    50% {
        opacity: 0.4;
        transform: scale(1.3);
    }
    100% {
        opacity: 0.2;
        transform: scale(1.2);
    }
}

@keyframes notePulse {
    0%, 100% {
        transform: scale(1);
    }
    25% {
        transform: scale(1.05);
    }
    50% {
        transform: scale(1.1);
    }
    75% {
        transform: scale(1.05);
    }
}

/* Animaciones de precisión */
@keyframes precisionPulse {
    0% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 10px currentColor;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.3);
        box-shadow: 0 0 25px currentColor;
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 15px currentColor;
    }
}

@keyframes precisionExact {
    0%, 100% {
        box-shadow: 0 0 15px #4CAF50;
        background: #4CAF50;
    }
    50% {
        box-shadow: 0 0 30px #4CAF50, 0 0 60px #4CAF50;
        background: #66BB6A;
    }
}

@keyframes precisionClose {
    0%, 100% {
        box-shadow: 0 0 10px #FF9800;
        background: #FF9800;
    }
    50% {
        box-shadow: 0 0 20px #FF9800;
        background: #FFB74D;
    }
}

@keyframes precisionFar {
    0%, 100% {
        box-shadow: 0 0 8px #F44336;
        background: #F44336;
    }
    50% {
        box-shadow: 0 0 16px #F44336;
        background: #EF5350;
    }
}

/* Animaciones de canvas */
@keyframes canvasFadeIn {
    from {
        opacity: 0;
        filter: blur(5px);
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        filter: blur(0);
        transform: scale(1);
    }
}

/* Clases de animación aplicables para Fase 4 */
.animate-meter-glow {
    animation: meterGlow 2s ease-in-out infinite;
}

.animate-frequency-pulse {
    animation: frequencyPulse 1.5s ease-in-out infinite;
}

.animate-note-activate {
    animation: noteActivate 0.4s ease-out forwards;
}

.animate-note-pulse {
    animation: notePulse 0.8s ease-in-out infinite;
}

.animate-note-glow {
    animation: noteGlow 0.6s ease-out forwards;
}

.animate-precision-pulse {
    animation: precisionPulse 0.5s ease-out;
}

.animate-precision-exact {
    animation: precisionExact 1s ease-in-out infinite;
}

.animate-precision-close {
    animation: precisionClose 1.5s ease-in-out infinite;
}

.animate-precision-far {
    animation: precisionFar 2s ease-in-out infinite;
}

.animate-canvas-fade-in {
    animation: canvasFadeIn 0.8s ease-out forwards;
}

/* Mejoras de performance */
.gpu-accelerated {
    transform: translateZ(0);
    will-change: transform;
}

/* Desactivar animaciones para usuarios que prefieren movimiento reducido */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .status-light.recording {
        animation: none;
        opacity: 1;
    }
    
    .note-item.close,
    .note-item.far {
        animation: none;
    }
    
    /* Desactivar animaciones específicas de Fase 4 */
    .animate-meter-glow,
    .animate-frequency-pulse,
    .animate-note-pulse,
    .animate-precision-exact,
    .animate-precision-close,
    .animate-precision-far {
        animation: none !important;
    }
}