body {
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(45deg, #ffebee, #fce4ec);
    font-family: 'Quicksand', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    text-align: center;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

h1 {
    color: #e91e63;
    font-family: 'Pacifico', cursive;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.countdown-wrapper {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 2rem 0;
}

.countdown-box {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    min-width: 100px;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.countdown-box:hover {
    transform: translateY(-5px);
}

.countdown-box span:first-child {
    font-size: 2.5rem;
    font-weight: bold;
    color: #e91e63;
}

.label {
    font-size: 0.9rem;
    color: #9e9e9e;
    margin-top: 0.5rem;
}

.message {
    font-size: 1.5rem;
    color: #e91e63;
    margin-top: 2rem;
    font-family: 'Pacifico', cursive;
}

.date {
    font-size: 1.2rem;
    color: #e91e63;
    margin-top: 1rem;
    opacity: 0.8;
}

.heart-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

@keyframes float {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh);
        opacity: 0.3;
    }
}

@media (max-width: 768px) {
    .countdown-wrapper {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .countdown-box {
        min-width: 80px;
        padding: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
}

.love-button {
    margin-top: 2rem;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    background: linear-gradient(45deg, #ff4b8d, #ff6b6b);
    border: none;
    border-radius: 25px;
    color: white;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(255, 75, 141, 0.3);
    transition: transform 0.3s ease;
    font-family: 'Quicksand', sans-serif;
}

.love-button:hover {
    transform: translateY(-3px);
}

.love-button + .love-button {
    margin-left: 1rem;
    background: linear-gradient(45deg, #ff6b6b, #ffa502);
}

.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.popup-content {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.2);
    animation: popIn 0.5s ease;
    max-width: 90%;
    width: 400px;
}

.popup-content p {
    font-size: 1.8rem;  /* Tăng kích thước chữ */
    color: #e91e63;
    margin-bottom: 2rem;
    font-family: 'Pacifico', cursive;
    animation: heartBeat 1.5s infinite;  /* Thêm hiệu ứng đập */
}

.popup-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.popup-btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 15px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: transform 0.3s ease;
    font-family: 'Quicksand', sans-serif;
}

.yes-btn {
    background: #ff4b8d;
    color: white;
}

.no-btn {
    background: #ffebee;
    color: #ff4b8d;
}

.popup-btn:hover {
    transform: scale(1.05);
}

@keyframes popIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

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