/**
 * Message Send Animation - Voces Anónimas
 * Animación elegante de carta/sobre enviándose - MEJORADA Y CENTRADA PARA MÓVIL
 */

/* ========== ANIMACIÓN DE SOBRE ENVIÁNDOSE - MEJORADA ========== */

/* Contenedor del sobre - CENTRADO PERFECTO */
.envelope-container {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 99999;
    pointer-events: none;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* El sobre */
.envelope {
    width: 200px;
    height: 140px;
    position: relative;
    animation: envelope-appear-and-send 3.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* Cuerpo del sobre */
.envelope-body {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
    border: 2px solid rgba(124, 136, 204, 0.15);
}

/* Tapa del sobre */
.envelope-flap {
    width: 0;
    height: 0;
    border-left: 100px solid transparent;
    border-right: 100px solid transparent;
    border-top: 70px solid #7C88CC;
    position: absolute;
    top: 0;
    left: 0;
    transform-origin: top center;
    filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.25));
    opacity: 0;
    animation: flap-appear-close 1.4s ease-out 0.5s forwards;
}

/* Líneas decorativas del sobre */
.envelope-lines {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 75%;
}

.envelope-line {
    height: 3px;
    background: linear-gradient(90deg, transparent, rgba(124, 136, 204, 0.5), transparent);
    margin: 12px 0;
    border-radius: 2px;
    opacity: 0;
    animation: line-appear 0.6s ease-out forwards;
}

.envelope-line:nth-child(1) {
    animation-delay: 0.9s;
    width: 85%;
}

.envelope-line:nth-child(2) {
    animation-delay: 1.1s;
    width: 95%;
}

.envelope-line:nth-child(3) {
    animation-delay: 1.3s;
    width: 75%;
}

/* Sello/estampilla */
.envelope-stamp {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #9BA4D4 0%, #7C88CC 100%);
    border: 2px solid white;
    border-radius: 6px;
    opacity: 0;
    animation: stamp-appear 0.5s ease-out 0.8s forwards;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.envelope-stamp::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid white;
    border-radius: 50%;
}

/* Animación principal del sobre - MEJORADA */
@keyframes envelope-appear-and-send {

    /* Fase 1: Aparecer (0-20%) */
    0% {
        opacity: 0;
        transform: scale(0.4) rotateY(-90deg);
    }

    20% {
        opacity: 1;
        transform: scale(1) rotateY(0deg);
    }

    /* Fase 2: Permanecer visible (20-65%) */
    65% {
        opacity: 1;
        transform: scale(1) rotateY(0deg);
    }

    /* Fase 3: Preparar envío (65-75%) */
    75% {
        opacity: 1;
        transform: scale(0.95) translateY(-10px) rotateY(3deg);
    }

    /* Fase 4: Enviar (75-100%) */
    90% {
        opacity: 0.7;
        transform: scale(0.5) translateY(-150px) rotateY(20deg) rotateX(15deg);
    }

    100% {
        opacity: 0;
        transform: scale(0.2) translateY(-300px) rotateY(30deg) rotateX(25deg);
    }
}

/* Animación de aparecer y cerrar la tapa */
@keyframes flap-appear-close {
    0% {
        opacity: 0;
        transform: rotateX(0deg) scale(0.8);
    }

    35% {
        opacity: 1;
        transform: rotateX(0deg) scale(1);
    }

    100% {
        opacity: 1;
        transform: rotateX(180deg) scale(1);
    }
}

/* Animación de las líneas */
@keyframes line-appear {
    0% {
        opacity: 0;
        transform: translateX(-40px);
    }

    100% {
        opacity: 0.8;
        transform: translateX(0);
    }
}

/* Animación del sello */
@keyframes stamp-appear {
    0% {
        opacity: 0;
        transform: scale(0) rotate(-45deg);
    }

    70% {
        transform: scale(1.15) rotate(5deg);
    }

    100% {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
}

/* ========== PARTÍCULAS DE BRILLO - OPTIMIZADAS ========== */

.sparkle {
    position: fixed;
    width: 6px;
    height: 6px;
    background: radial-gradient(circle, rgba(255, 255, 255, 1) 0%, rgba(124, 136, 204, 0.8) 100%);
    border-radius: 50%;
    box-shadow: 0 0 15px rgba(124, 136, 204, 0.9);
    animation: sparkle-float 1.8s ease-out forwards;
    pointer-events: none;
    z-index: 99998;
}

@keyframes sparkle-float {
    0% {
        opacity: 1;
        transform: translate(0, 0) scale(1);
    }

    100% {
        opacity: 0;
        transform: translate(var(--tx), var(--ty)) scale(0);
    }
}

/* ========== ONDAS DE ÉXITO ========== */

.success-wave {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 100px;
    height: 100px;
    border: 4px solid #6BCF7F;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: wave-expand 1.2s ease-out forwards;
    pointer-events: none;
    z-index: 99997;
}

@keyframes wave-expand {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, -50%) scale(7);
        opacity: 0;
    }
}

/* ========== EFECTOS DEL FORMULARIO ========== */

.form-sending {
    opacity: 0.35;
    pointer-events: none;
    filter: blur(5px);
    transition: all 0.6s ease;
}

.btn-sending {
    position: relative;
    overflow: hidden;
}

.btn-sending::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: translate(-50%, -50%);
    animation: button-pulse 2s ease-out infinite;
}

@keyframes button-pulse {
    0% {
        width: 0;
        height: 0;
        opacity: 1;
    }

    100% {
        width: 500px;
        height: 500px;
        opacity: 0;
    }
}

/* ========== MENSAJE DE ÉXITO - APARECE SUAVEMENTE ========== */

.success-message-appear {
    animation: success-fade-in 1.2s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes success-fade-in {
    0% {
        opacity: 0;
        transform: scale(0.9) translateY(50px);
    }

    60% {
        opacity: 0.7;
        transform: scale(1.03) translateY(-10px);
    }

    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* ========== ESTRELLAS DE FONDO ========== */

.star {
    position: fixed;
    width: 4px;
    height: 4px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(124, 136, 204, 0.9);
    animation: star-twinkle 3s ease-in-out infinite;
    pointer-events: none;
    z-index: 99996;
}

@keyframes star-twinkle {

    0%,
    100% {
        opacity: 0.3;
        transform: scale(1);
    }

    50% {
        opacity: 1;
        transform: scale(2);
    }
}

/* ========== RESPONSIVE - OPTIMIZADO PARA MÓVIL ========== */

@media (max-width: 768px) {
    .envelope {
        width: 160px;
        height: 112px;
    }

    .envelope-flap {
        border-left: 80px solid transparent;
        border-right: 80px solid transparent;
        border-top: 56px solid #7C88CC;
    }

    .envelope-stamp {
        width: 30px;
        height: 30px;
        top: 12px;
        right: 12px;
    }

    .envelope-stamp::before {
        width: 16px;
        height: 16px;
    }

    .envelope-line {
        height: 2px;
        margin: 10px 0;
    }

    .sparkle {
        width: 5px;
        height: 5px;
    }

    .success-wave {
        width: 80px;
        height: 80px;
        border: 3px solid #6BCF7F;
    }

    .star {
        width: 3px;
        height: 3px;
    }
}

/* Mejora de rendimiento en móvil */
@media (max-width: 768px) {

    .envelope-container,
    .sparkle,
    .success-wave,
    .star {
        will-change: transform, opacity;
    }
}