/* Envelope Section */
.envelope-section {
    min-height: 100vh;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 80px 20px;
    background: #ffffff;
    position: relative;
    overflow: hidden;
}

.envelope-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: none;
    opacity: 0.5;
}

.envelope-container {
    max-width: 1200px;
    width: 100%;
    text-align: center;
    position: relative;
    z-index: 1;
}

.envelope-title {
    font-size: 3rem;
    color: #333;
    margin-bottom: 1rem;
    font-weight: 300;
    letter-spacing: 2px;
    text-shadow: none;
}

.envelope-subtitle {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 4rem;
    font-weight: 300;
}

/* Envelope Wrapper */
.envelope-wrapper {
    height: 280px;
    width: 400px;
    margin: 0 auto;
    background-color: #8A9BA8;
    position: relative;
    display: flex;
    justify-content: center;
    border-radius: 4px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: transform 0.3s ease;
}

.envelope-wrapper:hover {
    transform: scale(1.02);
}

/* Envelope Lids */
.envelope-lid {
    position: absolute;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    border-right: 200px solid transparent;
    border-bottom: 140px solid transparent;
    border-left: 200px solid transparent;
    transform-origin: top;
    transition: transform 0.4s ease;
}

/* Front lid (closed) */
.envelope-lid.one {
    border-top: 140px solid #6B7F8E;
    transform: rotateX(0deg);
    z-index: 3;
    transition-delay: 0.75s;
}

/* Back lid */
.envelope-lid.two {
    border-top: 140px solid #8A9BA8;
    transform: rotateX(90deg);
    z-index: 1;
    transition-delay: 0.5s;
}

/* Envelope Body */
.envelope-body {
    position: absolute;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    border-top: 140px solid transparent;
    border-right: 200px solid #9DAEBB;
    border-bottom: 140px solid #9DAEBB;
    border-left: 200px solid #7A8D9C;
    z-index: 3;
    pointer-events: none;
}

/* Letter */
.envelope-letter {
    position: absolute;
    top: 20px;
    width: 85%;
    height: 85%;
    background: linear-gradient(to bottom, #ffffff 0%, #f8f8f8 100%);
    border-radius: 8px;
    z-index: 2;
    transition: transform 0.6s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.letter-content {
    opacity: 0;
    transition: opacity 0.5s ease;
    transition-delay: 0.8s;
    text-align: center;
}

.letter-content h3 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 0.5rem;
    font-weight: 400;
    font-family: 'Georgia', serif;
}

.wedding-date {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 1rem;
    font-weight: 500;
}

.invitation-text {
    font-size: 0.95rem;
    color: #555;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    max-width: 280px;
    margin-left: auto;
    margin-right: auto;
}

.btn-primary {
    background: #333;
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    font-weight: 500;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    background: #555;
}

/* Hover Effects */
.envelope-wrapper:hover .envelope-lid.one {
    transform: rotateX(90deg);
    transition-delay: 0s;
}

.envelope-wrapper:hover .envelope-lid.two {
    transform: rotateX(180deg);
    transition-delay: 0.25s;
}

.envelope-wrapper:hover .envelope-letter {
    transform: translateY(-110px);
    transition-delay: 0.5s;
}

.envelope-wrapper:hover .letter-content {
    opacity: 1;
}

/* Opened State (when clicked) */
.envelope-wrapper.opened .envelope-lid.one {
    transform: rotateX(90deg);
    transition-delay: 0s;
}

.envelope-wrapper.opened .envelope-lid.two {
    transform: rotateX(180deg);
    transition-delay: 0.25s;
}

.envelope-wrapper.opened .envelope-letter {
    transform: translateY(-110px);
    transition-delay: 0.5s;
}

.envelope-wrapper.opened .letter-content {
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .envelope-title {
        font-size: 2rem;
    }

    .envelope-subtitle {
        font-size: 1rem;
        margin-bottom: 3rem;
    }

    .envelope-wrapper {
        height: 220px;
        width: 320px;
    }

    .envelope-lid {
        border-right: 160px solid transparent;
        border-bottom: 110px solid transparent;
        border-left: 160px solid transparent;
    }

    .envelope-lid.one {
        border-top: 110px solid #6B7F8E;
    }

    .envelope-lid.two {
        border-top: 110px solid #8A9BA8;
    }

    .envelope-body {
        border-top: 110px solid transparent;
        border-right: 160px solid #9DAEBB;
        border-bottom: 110px solid #9DAEBB;
        border-left: 160px solid #7A8D9C;
    }

    .letter-content h3 {
        font-size: 1.5rem;
    }

    .wedding-date {
        font-size: 1rem;
    }

    .invitation-text {
        font-size: 0.85rem;
    }

    .btn-primary {
        padding: 10px 25px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .envelope-wrapper {
        height: 180px;
        width: 280px;
    }

    .envelope-lid {
        border-right: 140px solid transparent;
        border-bottom: 90px solid transparent;
        border-left: 140px solid transparent;
    }

    .envelope-lid.one {
        border-top: 90px solid #6B7F8E;
    }

    .envelope-lid.two {
        border-top: 90px solid #8A9BA8;
    }

    .envelope-body {
        border-top: 90px solid transparent;
        border-right: 140px solid #9DAEBB;
        border-bottom: 90px solid #9DAEBB;
        border-left: 140px solid #7A8D9C;
    }

    .envelope-letter {
        padding: 15px;
    }

    .letter-content h3 {
        font-size: 1.3rem;
    }

    .invitation-text {
        font-size: 0.8rem;
        max-width: 220px;
    }
}