body {
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top, #ffe6f2, #ffb3d9);
    font-family: "Poppins", sans-serif;
    color: #ff3399;
    text-align: center;
    overflow: hidden;
}

.time {
    font-size: 80px;
    font-weight: 700;
    text-shadow: 0 0 12px rgba(255, 105, 180, 0.4);
}

.date {
    font-size: 22px;
    margin-top: 10px;
    color: #cc2e8a;
}

.info {
    font-size: 15px;
    color: #cc2e8a;
    margin-top: 20px;
    min-height: 20px;
}

.btn {
    margin-top: 25px;
    background: linear-gradient(90deg, #ff66b3, #ff99cc);
    border: none;
    color: white;
    font-weight: 600;
    font-size: 16px;
    padding: 10px 24px;
    border-radius: 25px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 105, 180, 0.4);
    transition: all 0.25s ease;
}

.btn:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(255, 105, 180, 0.6);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

/* 🌸 Popup nhập mã */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.popup {
    background: white;
    padding: 25px 35px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 0 20px rgba(255, 105, 180, 0.4);
    color: #cc2e8a;
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.face {
    font-size: 40px;
    margin-bottom: 10px;
    transition: transform 0.3s ease;
}

.face.happy {
    color: #ff66b3;
    transform: scale(1.2);
}

.popup input {
    margin-top: 10px;
    padding: 8px 15px;
    border: 2px solid #ff99cc;
    border-radius: 20px;
    outline: none;
    text-align: center;
    color: #cc2e8a;
}

.popup button {
    margin-top: 15px;
    background: linear-gradient(90deg, #ff66b3, #ff99cc);
    border: none;
    color: white;
    padding: 8px 18px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: 0.25s;
}

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