/* Reset e base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 50%, #fd79a8 100%);
    min-height: 100vh;
    overflow: hidden;
    position: relative;
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    position: relative;
}

/* Sfondo sbrilluccica */
.sparkle-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 50%, #fd79a8 100%);
    background-size: 400% 400%;
    animation: gradientShift 4s ease infinite;
    z-index: -1;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Particelle sbrilluccica */
.sparkle-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, #fff, transparent),
        radial-gradient(2px 2px at 40px 70px, #fff, transparent),
        radial-gradient(1px 1px at 90px 40px, #fff, transparent),
        radial-gradient(1px 1px at 130px 80px, #fff, transparent),
        radial-gradient(2px 2px at 160px 30px, #fff, transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: sparkle 3s linear infinite;
}

@keyframes sparkle {
    0% { opacity: 0; transform: translateY(0px); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateY(-20px); }
}

/* Container lettera */
.letter-container {
    position: relative;
    z-index: 10;
}

/* Lettera chiusa */
.letter-closed {
    position: relative;
    cursor: pointer;
    animation: shake 3.5s infinite;
}

@keyframes shake {
    0%, 90%, 100% { transform: translateX(0); }
    5%, 15%, 25%, 35%, 45%, 55%, 65%, 75%, 85% { transform: translateX(-2px) rotate(-1deg); }
    10%, 20%, 30%, 40%, 50%, 60%, 70%, 80% { transform: translateX(2px) rotate(1deg); }
}

/* Wrapper della busta */
.envelope-wrapper {
    position: relative;
    width: 350px;
    height: 230px;
    margin: 0 auto;
    z-index: 10;
}

/* Busta realistica */
.envelope {
    position: relative;
    width: 350px;
    height: 230px;
    transform-style: preserve-3d;
    transition: all 0.8s ease;
}

/* Corpo principale della busta */
.envelope-body {
    position: absolute;
    width: 350px;
    height: 230px;
    background: #ffffff;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    z-index: 1;
}

/* Flap superiore */
.envelope-flap-top {
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    border-left: 175px solid transparent;
    border-right: 175px solid transparent;
    border-top: 115px solid #f8f8f8;
    transform-origin: bottom center;
    transition: transform 0.8s ease;
    z-index: 3;
}

/* Flap sinistro */
.envelope-flap-left {
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    border-top: 115px solid transparent;
    border-bottom: 115px solid transparent;
    border-left: 175px solid #f0f0f0;
    transform-origin: right center;
    transition: transform 0.8s ease;
    z-index: 2;
}

/* Flap destro */
.envelope-flap-right {
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-top: 115px solid transparent;
    border-bottom: 115px solid transparent;
    border-right: 175px solid #f0f0f0;
    transform-origin: left center;
    transition: transform 0.8s ease;
    z-index: 2;
}

/* Flap inferiore */
.envelope-flap-bottom {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 0;
    border-left: 175px solid transparent;
    border-right: 175px solid transparent;
    border-bottom: 115px solid #f0f0f0;
    transform-origin: top center;
    transition: transform 0.8s ease;
    z-index: 2;
}

/* Sigillo della busta */
.envelope-seal {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2.5rem;
    animation: heartbeat 2s ease-in-out infinite;
    z-index: 4;
}

@keyframes heartbeat {
    0% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.1); }
    100% { transform: translate(-50%, -50%) scale(1); }
}

/* Contenuto della lettera (nascosto inizialmente) */
.letter-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.8s ease;
    z-index: 0;
}

.letter-paper {
    width: 320px;
    height: 210px;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin: 10px auto;
    padding: 20px;
    overflow-y: auto;
}

.letter-message h3{
    font-family: 'Dancing Script', cursive;
    color: #333;
    line-height: 1.6;
}

.letter-message h3 {
    font-size: 1.4rem !important;
    color: #ff6b6b !important;
    margin-bottom: 12px !important;
    text-align: center !important;
    font-family: 'Dancing Script', cursive !important;
}

.letter-message p {
    font-size: 1rem !important;
    margin-bottom: 10px !important;
    font-family: 'Poppins', sans-serif !important;
    /*text-align: justify;*/
}

.signature {
    margin-top: 15px !important;
    text-align: right !important;
    font-weight: 600 !important;
    font-size: 0.9rem !important;
    color: #ff6b6b !important;
    font-family: 'Poppins', sans-serif !important;
}

/* Testo "Aprimi" */
.letter-text {
    text-align: center !important;
    margin-top: 20px !important;
    font-size: 1.8rem !important;
    font-weight: 600 !important;
    color: #2d3436 !important;
    text-shadow: 2px 2px 4px rgba(255,255,255,0.5) !important;
    animation: glow 2s ease-in-out infinite alternate !important;
    transition: opacity 0.5s ease !important;
    font-family: 'Poppins', sans-serif !important;
}

/* Nascondi "Aprimi" quando la busta è aperta */
.letter-container.opened .letter-text {
    opacity: 0;
    pointer-events: none;
}

@keyframes glow {
    from { text-shadow: 2px 2px 4px rgba(255,255,255,0.5), 0 0 10px rgba(255,255,255,0.3); }
    to { text-shadow: 2px 2px 4px rgba(255,255,255,0.8), 0 0 20px rgba(255,255,255,0.6); }
}

/* Effetto hover sulla lettera */
.letter-closed:hover .envelope-body {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.2);
}

.letter-closed:hover .envelope-seal {
    animation: bounce 0.6s ease infinite;
}

@keyframes bounce {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.2); }
}

/* Animazioni per l'apertura della busta */
.envelope.opened .envelope-flap-top {
    transform: rotateX(-120deg);
}

.envelope.opened .envelope-flap-left {
    transform: rotateY(-60deg);
}

.envelope.opened .envelope-flap-right {
    transform: rotateY(60deg);
}

.envelope.opened .envelope-flap-bottom {
    transform: rotateX(60deg);
}

.envelope.opened .envelope-seal {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0);
}

.letter-content.opened {
    opacity: 1;
    transform: scale(1);
    z-index: 5;
}

/* Ingrandimento graduale della busta dopo l'apertura */
.envelope-wrapper.opened {
    transform: scale(1.5);
    transition: transform 1.2s ease-in-out;
}

.letter-container.opened {
    transform: scale(1.5);
    transition: transform 1.2s ease-in-out;
}

/* Foto che ruotano intorno alla lettera */
.rotating-photos {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    opacity: 0;
    transition: opacity 1s ease;
    pointer-events: none;
    z-index: 5;
}

.rotating-photos.show {
    opacity: 1;
}

.photo-item {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60px !important;
    height: 60px !important;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: all 0.3s ease;
}

.photo-item.exit {
    opacity: 1;
    animation: exitFromEnvelope 1s ease-out forwards;
}

.photo-item.rotate {
    animation: rotateAround 20s linear infinite;
}

/* Stile Polaroid */
.polaroid-photo {
    width: 100% !important;
    height: 100% !important;
    background: white !important;
    border-radius: 8px !important;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15) !important;
    border: 1px solid #e0e0e0 !important;
    display: flex !important;
    flex-direction: column !important;
    overflow: hidden !important;
    transition: all 0.3s ease !important;
    position: relative !important;
}

.polaroid-photo:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 35px rgba(0,0,0,0.25);
}

.polaroid-image {
    width: 100% !important;
    height: 70% !important;
    object-fit: cover !important;
    border-radius: 6px 6px 0 0 !important;
}

.polaroid-text {
    height: 50px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-family: 'Poppins', sans-serif !important;
    font-size: 0.5rem !important;
    font-weight: 600 !important;
    color: #333 !important;
    text-align: center !important;
    padding: 1px !important;
    background: white !important;
    border-radius: 0 0 6px 6px !important;
    letter-spacing: 0.1em !important;
}

/* Animazione di uscita dalla busta */
@keyframes exitFromEnvelope {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, -50%) translateY(-100px) scale(0.8);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) rotate(var(--rotation)) translateY(-200px) rotate(calc(-1 * var(--rotation))) scale(1);
        opacity: 1;
    }
}

/* Animazione di rotazione continua */
@keyframes rotateAround {
    0% {
        transform: translate(-50%, -50%) rotate(var(--rotation)) translateY(-200px) rotate(calc(-1 * var(--rotation)));
    }
    100% {
        transform: translate(-50%, -50%) rotate(calc(var(--rotation) + 360deg)) translateY(-200px) rotate(calc(-1 * var(--rotation) - 360deg));
    }
}

.fiori-container {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 150px;
    z-index: 10;
    justify-content: center;
    align-items: center;
    display: flex;
    opacity: 0;
    transform: translateY(100%);
    transition: all 1.5s ease-out;
    pointer-events: none;
}

.fiori-container.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
#fiori {
    width: 100px;
    height: 150px;
    object-fit: cover;
}
/* Responsive Design */
@media (max-width: 768px) {
    .envelope-wrapper {
        width: 200px;
        height: 130px;
    }
    
    .envelope {
        width: 200px;
        height: 130px;
    }
    
    .envelope-body {
        width: 200px;
        height: 130px;
    }
    
    .envelope-flap-top {
        border-left: 100px solid transparent;
        border-right: 100px solid transparent;
        border-top: 65px solid #f8f8f8;
    }
    
    .envelope-flap-left {
        border-top: 65px solid transparent;
        border-bottom: 65px solid transparent;
        border-left: 100px solid #f0f0f0;
    }
    
    .envelope-flap-right {
        border-top: 65px solid transparent;
        border-bottom: 65px solid transparent;
        border-right: 100px solid #f0f0f0;
    }
    
    .envelope-flap-bottom {
        border-left: 100px solid transparent;
        border-right: 100px solid transparent;
        border-bottom: 65px solid #f0f0f0;
    }
    
    .letter-paper {
        width: 180px;
        /*height: 110px;*/
        padding: 12px;
    }
    
    .envelope-seal {
        font-size: 1.5rem;
    }
    
    .letter-text {
        font-size: 1.2rem;
    }
    
    /* Ingrandimento ridotto per mobile */
    .envelope-wrapper.opened {
        transform: scale(1.3);
    }
    
    .letter-container.opened {
        transform: scale(1.3);
    }
    
    /* Font ridotto per mobile */
    .letter-message h3 {
        font-size: 1.1rem;
        margin-bottom: 8px;
    }
    
    .letter-message p {
        font-size: 0.8rem;
        margin-bottom: 8px;
    }
    
    .signature {
        margin-top: 10px;
        font-size: 0.7rem;
    }
    
    /* Foto più piccole per mobile */
    .rotating-photos {
        width: 280px;
        height: 280px;
    }
    
    .photo-item {
        width: 45px;
        height: 45px;
    }
    
    .polaroid-text {
        font-size: 0.6rem;
        padding: 3px;
    }
    
    /* Fiori per mobile */
    .fiori-container {
        height: 120px;
    }
    
    #fiori {
        width: 80px;
        height: 120px;
    }
    
    /* Animazione di uscita per mobile */
    @keyframes exitFromEnvelope {
        0% {
            transform: translate(-50%, -50%) scale(0.5);
            opacity: 0;
        }
        50% {
            transform: translate(-50%, -50%) translateY(-80px) scale(0.8);
            opacity: 1;
        }
        100% {
            transform: translate(-50%, -50%) rotate(var(--rotation)) translateY(-120px) rotate(calc(-1 * var(--rotation))) scale(1);
            opacity: 1;
        }
    }
}

@media (max-width: 480px) {
    .envelope-wrapper {
        width: 180px;
        height: 120px;
    }
    
    .envelope {
        width: 180px;
        height: 120px;
    }
    
    .envelope-body {
        width: 180px;
        height: 120px;
    }
    
    .envelope-flap-top {
        border-left: 90px solid transparent;
        border-right: 90px solid transparent;
        border-top: 60px solid #f8f8f8;
    }
    
    .envelope-flap-left {
        border-top: 60px solid transparent;
        border-bottom: 60px solid transparent;
        border-left: 90px solid #f0f0f0;
    }
    
    .envelope-flap-right {
        border-top: 60px solid transparent;
        border-bottom: 60px solid transparent;
        border-right: 90px solid #f0f0f0;
    }
    
    .envelope-flap-bottom {
        border-left: 90px solid transparent;
        border-right: 90px solid transparent;
        border-bottom: 60px solid #f0f0f0;
    }
    
    .letter-paper {
        width: 160px;
        /*height: 100px;*/
        padding: 10px;
    }
    
    .envelope-seal {
        font-size: 1.2rem;
    }
    
    .letter-text {
        font-size: 1rem;
    }
    
    /* Ingrandimento ancora più ridotto per schermi piccoli */
    .envelope-wrapper.opened {
        transform: scale(1.25);
    }
    
    .letter-container.opened {
        transform: scale(1.25);
    }
    
    .letter-message h3 {
        font-size: 0.8rem !important;
        margin-bottom: 6px;
    }
    
    .letter-message p {
        font-size: 0.7rem !important;
        margin-bottom: 6px;
    }
    
    .signature {
        margin-top: 8px;
        font-size: 0.6rem !important;
    }
    
    /* Foto ancora più piccole */
    .rotating-photos {
        width: 240px;
        height: 240px;
    }
    
    .photo-item {
        width: 115px !important;
        height: 100px !important;
    }
    
    .polaroid-text {
        font-size: 0.5rem;
        padding: 2px;
    }
    
    /* Fiori per schermi piccoli */
    .fiori-container {
        height: 100px;
    }
    
    #fiori {
        width: 60px;
        height: 100px;
    }
    
    /* Animazione di uscita per schermi molto piccoli */
    @keyframes exitFromEnvelope {
        0% {
            transform: translate(-50%, -50%) scale(0.5);
            opacity: 0;
        }
        50% {
            transform: translate(-50%, -50%) translateY(-70px) scale(0.8);
            opacity: 1;
        }
        100% {
            transform: translate(-50%, -50%) rotate(var(--rotation)) translateY(-100px) rotate(calc(-1 * var(--rotation))) scale(1);
            opacity: 1;
        }
    }
}