:root {
    --bg-color: #fff0f3;
    --card-bg: rgba(255, 255, 255, 0.9);
    --accent-color: #ff4d6d;
    --text-color: #4a4a4a;
}

body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #fff0f3 0%, #ffccd5 100%);
    font-family: 'Montserrat', sans-serif;
    overflow-x: hidden;
}

.app-container {
    width: 90%;
    max-width: 400px;
    perspective: 1000px;
}

.card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 30px;
    box-shadow: 0 15px 35px rgba(255, 77, 109, 0.2);
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid white;
    transition: all 0.5s ease;
    animation: fadeIn 0.8s ease-out;
}

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

.main-gif {
    width: 100%;
    max-height: 250px;
    object-fit: contain;
    border-radius: 20px;
    margin-bottom: 20px;
}

.slide-text {
    font-size: 1.1rem;
    line-height: 1.5;
    color: var(--text-color);
    margin-bottom: 25px;
    font-weight: 400;
}

.next-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    transition: transform 0.2s, box-shadow 0.2s;
}

.next-btn:hover {
    transform: scale(1.03);
    box-shadow: 0 5px 15px rgba(255, 77, 109, 0.4);
}

.btn-gif {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    object-fit: cover;
}

.final-signature {
    font-family: 'Caveat', cursive;
    font-size: 2rem;
    color: var(--accent-color);
    margin-top: 20px;
    display: block;
}